Store FAQ

• Do you accept orders placed outside of the US?

  We sure do! We accept orders placed from almost all worldwide countries except some remote countries. We use DHL global shipping, EMS, Swiss air post or Netherlands air post shipping service. The delivery day may be 5-15 days. Some countries may need longer.

• How long will it take to receive my order?

  It takes us 2-5 days for shipment preparation and 5-15 days for delivery. So, you will receive your order in 7-20 days or shorter after order is placed.

• Is there technical support for the products

  Yes, there is free technical support. Like other alarm system supplier, we have our support forum and blog for learning our products. It locates at https://www.vedard.com/forum and https://www.vedard.com/blog And email [email protected] is for our technical supports. We will provide skype id, online php BB chat for providing more clear solution for your question. Meanwhile, detailed installing manual is included with the product shipped.

• How is the quality of the products

  The quality of the products are guaranteed for at least 6 months. They are all professional home security and business security device. The most advanced technologies are adopted such as wireless signal encryption, detector status and power status check, system self checking, tamper-resistant, neighbor instead alarm report, duress code alarm sending etc. Some products are industry grade security systems such as solar-power perimeter detector, long range wireless guard alarm signal systems etc. The components used are long life, environment friendly grade. The fire alarm system meets requirement of NFPA coding, Form-A standard contact relay output for fire communication. The products are designed with the most advanced alarm security system technology and reliability, accurate alarm and high security is our orientation.

• What type of fire alarm system do you supply

  Fire alarm system is selected according to fire security project design. There are conventional fire alarm system (non-addressable types wired security system) and addressable fire alarm system. Fire detection and monitor capacity are varied according to remand. For example, for conventional fire alarm control panel, there are 2-zones, 4-zones, 8-zones or 16-zones fire alarm panel. Each zone can monitor 20 detectors. For addressable fire alarm, there are 2-loop, 4- loops, 6- loops, 8-loops or 10-loops alarm panel. Each loop can monitor 200-300 detectors and monitor device. For industry requirement, explosion proof gas detector, heat detector or special gas sensor, siren strobe explosion proof is required. So, we can make the fire security solution and select the suitable security equipment according to the security project requirement. Some information and user manual of fire alarm system is available to download at http://www.vedard.com/forum

• Can I install the home security system by myself

  Self installing home security system is not hard cause there is phone app, detailed user manual guidance for setting and operation. You should strictly follow the steps. For example, the setting only can be done at disarm status, so, you should note of it and follow. For app connection, it may have problem to connect to server. There will be error hint and you need to read and understand it. So, if you decide to install a home security system by yourself at first time, you should better have electronics experience. At least you should be able to read user manual carefully. It is hard to say it is easy or difficult to install a home security system. For some people, it is easy and for another one, it maybe hard and gets mess. Read more about home security system installation and troubleshooting at https//www.vedard.com/blog

• How to test and install solar beam system

  Solar beam wireless perimeter security system is popular used for security protection of factory, community, warehouse, villa etc. It is easy to install without any wiring. It is easy to maintenance with fault, low battery report and tamper-resistant. It is easy to be added to exist security system with wireless signal adapter. It is easy to use with CMS security service management software. How to test and install the solar beam system? 1. Test Method To test the quality of wireless solar powered alarm beams, we should test 4 parts of the system. They are battery, infrared distance, wireless signal transmitting distance and solar panel charging capability at cloudy and rainy days. A. Test of battery The rate voltage of the battery is 4.2V. If the solar powered wireless beam works at illumination under 1600Lx for continual days and the battery voltage is down to 3.8V, the product will activate battery protection system. It will protect the battery from overusing and the solar powered beams don’t work now. After the battery is recharged to 4.1V, it restart to work. At normal working environment, the battery starts to recharge when voltage is 3.9V and without low voltage protection. Test 1: Working time without sunlight The solar powered beams can work for 20 days without sunlight. Put the beams with battery installed at place without illumination such as drawer, box, then trigger it. The day before receiver terminal indicator doesn’t light on is the last work day. Test 2: Battery recharging time At normal sunlight environment, the battery recharging time is 1 day. (from low voltage to full voltage) Put the beam with battery installed at place full of sunlight, take down the battery and test its voltage after 1 day. B. Test of infrared distance The infrared distance of wireless solar powered beams is 100m Install the batteries in beams, aiming and then enroll it to alarm panel. Take the transmitter and receiver beams to 100m distance, aiming again, receiver terminal indicator flash slow then flash fast and then light off. Trigger the beams, the alarm panel send out alarm signal. C. Test of wireless transmitting distance The distance between wireless beams and alarm panel is 100m (can reach to 1 km with high power) Put the alarm panel at a place, enroll the wireless beams to the panel, put the beams at another place which is 100m from the panel, trigger the beams, the panel will alarm. Repeat to trigger the beams to test the stability. D. Test of solar panel charging capability at bad days Amorphous silicon solar panel is used for the beams. It enables the beams to be recharged at cloudy and rainy days. At cloudy or rainy day, put the beam outdoor without battery installed. Place the solar panel towards outside. The beam indicator red LED will keep flashing. That means the solar panel is charging. The solar panel works via absorbing UV light and can work at illumination level is over 1700Lx. The illumination can reach to 2500-2700Lx with sun light and reach to 2000Lx without sun light. Notes of using the solar powered wireless beams 1. Trigger way Only all beams are blocked, the product will trigger alarm. To avoid false alarm by animals and falling down things, the product is designed with required blocking speed. A thicker object such as a book is required for test. Not too fast speed is required to test. Please make sure the receiver indicator lights on when it is triggered. When the product is triggered, the receiver terminal indicator will light on, then light off. Only after it lights off, it will be on work status again for next time trigger. If the indicator is lighting on and now trigger it again, it will not send alarm signal. 2. Aiming If transmitter terminal and receiver terminal are not aimed, the indicator of receiver will keep lighting on. When they are aimed, the receiver terminal indicator will flsh slow, then fast and lights off at last. Now, it is at work status. 3. Alarm Panel Antenna of the alarm panel should be pulled out totally to ensure the receiving distance. Remember to enroll the test beams to the alarm panel and arm the panel before test. Avoid to test and use the wireless alarm products at places which is with high magnetism, high voltage equipment or metal objects. Video guidance and details at https://vedard.com/blog/how-to-test-and-install-solar-beam-system

• Why should home safety include perimeter security

  In the past, perimeter security was generally used only in factories, industries, and corporate buildings. But with the development of technology and the improvement of products, the installation and maintenance of perimeter security alarm system is very simple. Perimeter security is the most important part of home security system. Perimeter security is the first line of defense of home security. The perimeter burglar alarm system can block the thieves in the outdoor to protect the family and property. Can people DIY perimeter security? Yes. Solar wireless beam, detector, infrared grating, infrared wall alarm system is the simplest perimeter security equipment for DIY or professional installation. How easy is it to install a solar perimeter alarm system? The simplest security kit is Solar power motion light courtyard lighting. It can be placed in balcony, courtyard, garden. When someone passes by, it will light up. As a result, the burglar will give up further burglary. Another simple perimeter security kit is driveway monitor solar wireless infrared detector with wireless alarm bell. You can place the solar detector on the entrance of driveway or gate. The entry of vehicle or people will be detected and notified by alarm bell indoor. So, people indoor will receive notify and get ready when someone or the thieves entering into the driveway or yard. You can add a door magnetic contact and receive alarm when someone opens the door. If you have a fence, you need to prevent and monitor climbing, then you need to use 2-beam, 3-beams or 4-beams solar wireless photoelectric infrared beam break alarm system. If you have a garden, you can use solar garden lamp with intruder detector alarm system. For windows, balcony, you need to use solar wireless infrared grating for intrusion detection and alert before breaking. Solar power wireless alarm system includes solar wireless outdoor detector, break beam, infrared grating, garden lamp with intruder detector, indoor solar PIR sensor, smoke alarm, gas sensor, water leakage detector, panic button, door contact, wireless alarm bell or app alarm host. You can add up to 32 to 99 wireless detectors and remote controller to one alarm receiver. Find solar wireless alarm brochure. Self-defense is fundamental to home safety. Choosing the right security system can better resist the intrusion of thieves. Perimeter security is an important part of home security system. A perimeter security system must be included when designing a home security solution. For already installed home security system, solar wireless perimeter security system can also be easily added. Solar energy perimeter security system is equipped with wireless wired adaptor, wireless long distance repeater. It can be combined with a third-party wireless home alarm system. Read more and watch video guidance at https://vedard.com/blog/perimeter-security-should-be-included-in-home-security-system

• Can solar beam be used at gas station or oil depots

  As we know, mobile phones and other wireless electronic devices are generally prohibited in flammable and explosive dangerous places such as oil depots or gas filling stations. Because gasoline is a volatile substance, oil and gas tanks and natural gas pipelines may leak and form a combustible gas danger zone, the radio frequency spark generated by mobile phones is easy to cause explosions, leading to disasters. Is there also a risk of explosion if wireless electronic alarms are installed at the perimeter of such places? Flammable and explosive places such as oil depots or gas filling stations must avoid the connection of conductive cables, so as to avoid the generation of strong electricity or electrostatic sparks. Solar Wireless Intrusion Detector Infrared beam is designed according to industrial and commercial security standards. It can be used at gas station or oil depots cause of following features. 1.The waterproof and dust-proof grade of the whole wireless anti-theft equipment is IP66. All metal conductors and electronic components are sealed inside the cavity, which can fully prevent the contact between the combustible gas and dust outside the shell and the internal electronic components. 2.The signal transmission frequency band of all wireless anti-theft equipment belongs to the legal civil frequency 433MHz. The wireless communication module (433MHz band) is safe and reliable. 3.Low amount of wireless radiation, minimal impact on the safety of the surrounding environment. Due to the independent power supply mode, the all-wireless anti-theft equipment has been fully considered in the design of energy-saving mode to reduce power consumption and wireless transmission frequency.Therefore, the wireless signal intensity of the device is zero when it is in standby state. Only when detecting illegal intrusion alarm, it will send a trace of wireless signal (the signal radiation intensity is less than 1/10000 of mobile communication equipment), instead of sending wireless signal in real time, which effectively reduces the radiation amount. 4.All-wireless anti-theft equipment solar beam is installed in the perimeter of the place, which is outside the safety red line, so as to avoid close contact with high-density combustible gas, dust and so on, and it is safe. Watch solar beam security system installation video at https://vedard.com/blog/can-solar-beam-be-used-at-gas-station-or-oil-depots

• How to add additional sensor to the receiver?

  Up to 32 sensors can be added to one receiver. Step 1 Plug the receiver into an outlet Step 2 Press and hold the "Volume" button for 5 seconds and release the button when you hear a beep prompt and the indicator light flashes. Step 3 Activate the sensor. Note: Please have the sensor close to the plug-in receiver. The light of the ON/OFF button will flash once meaning the motion sensor was activated and sent the wireless signal. A ring tone prompt and the indicator light flashes quickly meaning the sensor has been added to the plug-in receiver successfully. Step 4 Activate the sensor again to confirm the sensor has been added to the receiver already Step 5 Press "Melody" button to choose the melody for this sensor. Total 35 optional melodies. Driveway monitor burglar alarm intrusion alert device installation guide at https://www.vedard.com/forum/hb-t704-hb-805a-t3131.html

• How can I be warned of an outdoor invasion

  If you live in boonies, farm, house and you have a long driveway, or yard, parking area, garage, you may need to be notified when someone pass by there. So, driveway monitor is such as security kits. The driveway monitor is designed for easy DIY. It is solar power wireless alarm. The alarm bell has 35 sounds for identification of different sensors. (it can equip maximum 32 wireless sensors including door contact, driveway intrusion sensor, infrared beam, windows infrared grating, water leakage detector etc.) Pay your attention on work, life and have the home security monitor to watch on your home. All the potential risk factors will be reported by the alarm bell. Try to DIY home security with solar alarms. Technical support for installing home security system at https://www.vedard.com/forum/hb-t704-hb-805a-t3131.html

• What is CO carbon monoxide monitor?

  Carbon monoxide is a flammable gas and a toxic gas as well. According to the requirements of the design code for detecting flammable gases and toxic gases in petrochemical industry, only toxic gas detectors should be set up. Therefore, when choosing a detector where carbon monoxide is likely to leak, you should choose a carbon monoxide poisonous gas detector. Carbon monoxide detector can be used as a detection device for the poisonous gas carbon monoxide.Connect it to the combustible gas alarm controller in the combustible gas detection and alarm system.Carbon monoxide detector also has sound and light alarm, and can work independently to send the alarm signal on site. Most fires produce carbon monoxide, but early fires with inadequate combustion and smoldering produce large amounts.So carbon monoxide detectors can be used as fire detectors. When carbon monoxide detectors are used as fire detectors, they should be connected to the automatic fire alarm system. There are two types of carbon monoxide detectors for household and industrial use. Both types have sound, light alarms and CARBON monoxide concentration LCD displays. Industrial carbon monoxide detectors are explosion-proof. Domestic carbon monoxide detectors are available in both AC and DC modes.It can be connected to the home alarm system and send alarm signals through the alarm controller. Carbon monoxide detector is an important equipment for home safety.

• What are the types of smoke and how are they connected

  Smoke detectors can be divided into independent smoke detectors, network smoke detectors and wireless smoke detectors. The independent smoke detector is usually powered by 9V battery and emits sound and light alarm on site.Independent smoke detectors are suitable for use in homes, shops and rental housing. Network smoke detectors: There are three types of network smoke detectors. 1. Coded (addressable) smoke detector. The coded smoke detector must work with the supporting fire alarm host. It adopts two bus wiring and DC24V power supply. These smoke detectors have no built-in buzzers and no sound is heard when they alarm. There are flashing lights on the scene and they send signals to the host, which can trigger sound and light alarm on the host. Code type smoke detector is used in large fire alarm system, such as hotel fire alarm, plant fire alarm, community fire alarm. Wiring: Most bus code type addressable smoke detector wiring is Non-polarized two-wires, only two of the diagonal terminals of the base’s four metal terminals are needed to be wired. But pay attention to using the same wiring for a fire alarm system. For point-type smoke detectors with positive and negative poles, please connect the wires according to the instructions. 2. Switch type(relay output) smoke detector It works with home security alarm panel or Fire shutter system, monitoring system. It is powered by 9-28V DC voltage. It has sound and light alarm on spot. It will send alarm signal via N/O or N/C circuit to alarm panel. Generally it has 4-wires. 2 wires are for power supply and 2 wires are for signal transmission. Relay smoke detectors are mainly used for firework prevention and monitoring of individual equipment and fields, such as engine room fire prevention, building fire prevention, and telecommunication base station fire prevention. Wiring: Relay output smoke detector can trigger on spot sound and light alarm, so, power wiring is needed. It uses 4-wires wiring. (4-wire smoke detector)The power wire is connected to terminals 3 and 4 of the base. The output wires of the relay passive contact are connected to terminals 1 and 2. Passive contact signals have two initial modes, normally open and normally closed. The appropriate mode should be selected according to the system needs. 3. Multiple wires (conventional) smoke detector. It works with conventional fire alarm panel. After alarm, the voltage drop down and triggers the fire alarm host. There is no sound and light on spot. The conventional fire smoke detector is suitable for use at small places such as villa, shop, chain store, hair salon, the family hotel etc. Wiring: The conventional non-coding multi-wire smoke detector adopts the two-wire connection method: the power cord is connected to the base terminals 2 and 4, and terminals 2 and 3 are short-circuited inside the smoke detector. Wireless smoke detector It is upgrade of independent smoke detector. A wireless transmission module is added to the smoke detector. Generally it is powered by 9V battery as well. It works with same brand wireless alarm panel. NB-Lot smoke detector is a new type wireless smoke detector based on Internet of Things technology. Nb-lot network is used to upload the alarm signal to the remote monitoring platform. Source from https://vedard.com/blog/smoke-detectors-types-and-wiring

• What should I know of anti-theft alarm system?

  Basic knowledge of anti-theft alarm system. 1) What parts of the alarm system consist of? Answer: A simple alarm system consists of a front-end detector, an intermediate transmission part and an alarm host. Larger systems can also regard the detector and the alarm host as the front-end part, the transmission part from the alarm host to the alarm receiving machine, and the central alarm receiving part as the back-end part. 2) According to different information transmission methods, what types of alarm systems can be divided into? Answer: According to the different ways of information transmission, there are two types from the detector to the host: wired and wireless. From the host to the central alarm receiving machine can also be divided into two types: wired and wireless. The wired system can also be divided into two types: telephone line-based transmission and bus-based transmission. 3) What is an alarm host? Answer: Alarm host: the "brain" part of the alarm system, which processes the signal from the detector and controls the alarm system by providing arming and disarming operations through keyboards and other devices. It can provide sound/light prompts when alarming, and can also transmit the alarm information to the alarm center through the telephone line. 4) What are the common types of defense zones in the alarm system? Answer: Common types include entry and exit zones, real-time zones, internal zones, and 24-hour zones. 5) What is the entry and exit zone? Answer: Entry and exit zones are also called delayed zones. After arming, the system will provide a certain time delay for entering and exiting the defense zone. After the exit delay time expires, the delay defense zone system alarm will be triggered. When the delay zone is triggered when entering, the controller will beep during the entry delay time as a reminder signal to disarm the system. The system must be disarmed within the set delay time, otherwise it will alarm. This zone type is suitable for the user's entry/exit operation keyboard must pass. 6) What is a real-time defense zone? Answer: When the real-time defense zone is triggered after the system is armed, it will alarm immediately without delay time. 7) What is an internal zone? Answer: Internal defense zone: After the system is armed, if the entry and exit zone is triggered first and then the internal defense zone is triggered, the internal defense zone will also enter the delay state and will not immediately alarm. The delay time of the defense zone is the same as the entry and exit zone. If the internal defense zone is triggered before the entry and exit zone is not triggered, the system will immediately alarm. 8) What is the perimeter zone? Answer: Perimeter defense zones are used for exterior doors and/or windows. When the defense zone is triggered, an alarm will be issued immediately. 9) What is a 24-hour defense zone? Answer: The 24-hour defense zone is not affected by arming or disarming, and the zone is triggered and immediately alarms. 10) What is a 24-hour audible emergency zone? Answer: 24-hour audible emergency defense zone: It is a kind of 24-hour defense zone. When this type of defense zone is triggered, external warning lights and siren will give out sound and light prompts, and display an alarm on the keyboard. This type is suitable for emergency buttons. 11) What is a 24-hour silent emergency zone? Answer: 24-hour audible emergency defense zone: It is a kind of 24-hour defense zone. When this type of defense zone is triggered, the external warning lights and siren will not emit sound and light prompts, nor display alarms on the keyboard. This type is suitable for emergency buttons in important places such as banks and jewelry counters. 12) What is a fire zone? Answer: Fire zone: a type of 24-hour zone. A fire alarm signal will be issued when the defense zone is triggered, and the keyboard will display the defense zone number and trigger an external siren to sound a special alarm. For use in a 24-hour fortified area equipped with smoke detectors, heat detectors or emergency buttons. 13) What is out of home arm? Answer: Out of home arm: refers to a mode of arming the system when all users leave the protected area of ​​the alarm system. In this mode, all defense zones in the system are in working state. 14) What is home arm? Answer: Stay-home arming: refers to a mode of arming the system when the user is in the internal protection area of ​​the alarm system. In this arming mode, all perimeter defense areas in the system (such as outdoor perimeter probes, window magnets, curtains on balcony) Type probe, etc.) is in the armed state, and the internal defense zone in the system (usually an infrared probe installed indoors) will be automatically bypassed by the system, and internal personnel can automatically move in this area without generating an alarm.ome arm. 15) What is disarming? Answer: Disarming: refers to the alarm host exiting the alert state by password or key method. 16) What is to eliminate the alarm? Answer: The system has an alarm during the arming period, and there is still a prompt on the keyboard after the defense is disarmed. To eliminate the alarm is to stop the alarm sound after disarming and return to the disarmed state. 17) What is the entry delay? Answer: Entry delay: It means that the entry and exit of the defense zone is triggered after a person enters the entry and exit zone from the outside, but the system will not immediately alarm, but is in the entry delay state (usually tens of seconds). During this process, you must immediately disarm the alarm system correctly, otherwise the system will generate an alarm after the entry delay expires. 18) What is the outgoing delay? Answer: Outgoing delay: refers to the delay time (usually several tens of seconds) left for the operator to leave the zone after the system is armed. You must leave the entry and exit zone during this time, otherwise you will trigger the entry and exit zone after the delay expires. 19) What is bypass? Answer: Bypass: When arming, one or some of the zones will not be added to arming. 20) What is the installer password? Answer: The password used by the installer, through which you can enter the programming of the system and set up the system. 21) What is the owner password? Answer: The password used by system operators is the highest level password among all operator passwords. This password can be used to manage the passwords of other users. 22) What is a duress password? Answer: When the user needs to disarm the system under the threat of hijacking by gangsters, you can use this duress password to operate. At this time, it appears that the system is normally disarmed, but in fact the system will silently send a duress alarm to the center. 23) What is a dual-network alarm host? Answer: An alarm host with dual communication functions of telephone line alarm and GSM wireless alarm. When the telephone line fails, the information can be automatically transmitted through the GSM communication module, and the two communication methods can also be used at the same time. Greatly improve the reliability of information transmission. 24) What are the advantages and disadvantages of wired/wireless alarm systems? Answer: The detector of the wired alarm system and the host are connected by a data cable, and the host to the alarm center adopts telephone line or bus transmission mode. The wired alarm system has low cost, high reliability, and convenient maintenance, but it has shortcomings such as long construction period and large engineering volume. It is suitable for places with low requirements for beautiful environment. 25) What are the types of detectors? What are the common types on the market? Answer: Infrared, microwave, vibration, smoke, air, broken glass, pressure, ultrasonic, etc. Among them, infrared detectors can be divided into active infrared and passive infrared, and smoke detectors can also be divided into ion type and photoelectric type. Commonly available in the market are infrared detectors (passive infrared), infrared through-beams, infrared fences (active infrared), double-check detectors, vibration detectors, glass break detectors and so on. 26) How does the active infrared detector work? Answer: Active infrared detector is composed of infrared transmitter and infrared receiver. The infrared transmitter emits one or most modulated infrared rays to the infrared receiver. When there is no obstruction between the transmitter and receiver, the detector will not alarm. When an object is obstructed, the output signal of the receiver changes and the detector alarms. 27) How does the passive infrared detector work? Answer: There are two key components in a passive infrared detector, one is a Fresnel lens and the other is a pyroelectric sensor. Any object in nature higher than the absolute temperature (-273o) will produce infrared radiation, and the wavelength of infrared energy released by objects at different temperatures is also different. The human body has a constant body temperature, which is different from the ambient temperature. When the human body moves, the change of this difference is detected by the pyroelectric sensor through the Fresnel lens, thereby outputting an alarm signal. 28) The role of Fresnel lens Answer: The Fresnel lens has two functions. One is to refract or reflect the pyroelectric infrared radiation to the pyroelectric sensor, and the other is to divide the detection area into several bright and dark areas. 29) What is a dual-element infrared detector? Answer: The detector that integrates two pyroelectric sensors with the same performance and opposite polarity is a dual-element detector. 30) What is a four-element infrared detector? Answer: The detector that integrates 4 pyroelectric sensors with the same performance and opposite polarity is a quaternary detector. 31) What is temperature compensation? Answer: In general, the human body temperature is always much higher than the ambient temperature. When the intruder moves, the sensor receives the infrared change signal with a large amplitude and triggers an alarm. When the nearby environment temperature rises to close to the temperature of the human body, the amplitude of the infrared change signal received by the sensor when the intruder moves is very small, so it is possible that the signal will not be alarmed because the signal is less than the trigger threshold. 32) What is analog pulse technology? Answer: Analog pulse counting: The detector measures the length of time the output signal exceeds the threshold. If the output of the amplifier exceeds the threshold for the length of time that reaches the preset value, an alarm signal will be triggered. The pulse count is generally adjustable from 1 to 3 levels. When the pulse count is 1, the sensitivity of the detector is extremely high. When the pulse count is 3, the sensitivity of the detector is lower but the ability to prevent false alarms is stronger. 33) What is digital pulse technology? Answer: Digital pulse counting: The detector counts the number of sector trigger edges triggered by the intruder from the beginning through digital counting, and triggers the alarm signal according to the preset digital pulse count. 34) How does the microwave detector work? Answer: The microwave detector uses the principle of the Doppler effect. In the microwave section, when transmitting at a frequency, when the emitted microwave encounters a fixed object, the frequency of the reflected microwave does not change, that is, f send = f receive, and the detector will not send an alarm signal. When the emitted microwave encounters a moving object, the frequency of the reflected microwave will change, that is, f send ≠ f receive, and the microwave detector will send out an alarm signal. 35) What is Shuangjian detector? What are the common Shuangjian detectors on the market? Answer: In order to overcome the shortcomings of a single technology detector, two types of detectors with different technical principles are usually integrated together. The detector that only alarms when the sensors of the two types of detection technologies detect the movement of the human body is called a double-check detector. . The most common dual-check detectors on the market are microwave + passive infrared, and infrared + air pressure detectors and audio + air pressure detectors. 36) What is Sanjian detector? What is Sijian detector? Answer: In order to further improve the performance of the detector, a detector with microprocessor technology added to the dual-check detector is called the three-check detector. Another technology is added to the Sanjian detector to become the Sijian detector. 37) What is a shock detector? Answer: Vibration detectors are based on the vibration signals generated by detecting intruders performing various sabotage activities. For example, when an intruder conducts sabotage activities such as wall digging, drilling holes, prying safes, etc., these objects will be caused. vibration. Detectors that use these vibration signals to trigger an alarm are called vibration detectors. 38) What kinds of common seismic detectors are there? How does it work? Answer: According to the different vibration sensors used, vibration detectors can be divided into: mechanical vibration detectors, inertial rod electronic vibration detectors, electric vibration detectors, piezoelectric crystal vibration detectors, electronic comprehensive vibration detectors Detectors and many other types. Recently, the most common piezoelectric crystal vibration detectors are based on the principle of using the piezoelectric effect of the piezoelectric crystal. Piezoelectric crystal is a special crystal, which can convert the mechanical force applied to it into an electrical signal of corresponding size. The frequency and amplitude of the electrical signal are proportional to the frequency and amplitude of the mechanical vibration. When the signal value reaches An alarm signal is issued when the value is set. 39) How does the glass break detector work? Answer: When the glass is hit and the glass is not broken, an ultra-low frequency elastic vibration wave will be generated. This mechanical vibration wave is lower than 20Hz and belongs to infrasound. The frequency of the loud and harsh sound emitted when the glass is broken is approximately in the range of 10-15KHZ, which is a high-frequency sound. When the detector detects both low and high frequency sound frequencies, it will generate an alarm signal. 40) What is the standard output signal of the detector? Answer: The standard output signal of the detector is a switch signal, which is available in normally open, normally closed, and normally open/normally closed options. 41) What are the advantages of the detector's alarm memory function? Answer: If more than one detector is connected to a defense zone, when an alarm event occurs, it is usually impossible to distinguish which detector is alarming. Using the alarm memory lock function of the detector, when an alarm event occurs, after the detector alarms, the alarm indicator will keep flashing until the system is reset. In this way, it is possible to identify which detector is warning. 42) What are the advantages of magnetic shielding relays? Answer: Magnetic shielding relay can prevent wireless electromagnetic interference and external force interference. If the detector does not have a magnetic shielding relay, when the magnetic substance is close to the detector shell, the external magnetic field can keep the relay normally open, send out a false alarm signal, and then make the detector fail. 43) What are the advantages of a sealed optical system? Answer: It can prevent small insects from crawling into the lens, and can prevent false alarms caused by air flow in the detector (near the sensor). Prevent bad reflections in the detector. Ensure the accuracy of the focus of the infrared sensor. 44) How to choose suitable infrared beam products for customers? Answer: Two points should be considered when choosing a target product. One is to choose according to the environment of the perimeter. If the environment is good, you can choose 2 beams. For the worse, you can choose more beams. In addition, choose the warning distance of the beam according to the distance of each straight line segment of the perimeter. The combination of 2 parameters can select the appropriate product. In addition, according to the customer's requirements for appearance, we can choose different shapes of opposite shot products. 45) What should be paid attention to when installing infrared beam? Answer: The radio should be fixed on the mounting bracket, and the mounting bracket must be firm to avoid shaking. The installation height is generally 30 cm above the warning surface, and there should be no trees, birds or other small animals inside the warning line. Avoid cross-reception when installing multiple sets of infrared beams on the same warning surface. The equipment access point should be sealed and waterproof. 46) How to choose indoor detectors for customers? Answer: Customers with better environment can choose infrared detectors, and those with poor environment can choose Shuangjian detectors. Then choose products with different detection distances according to the area that customers need to guard against. For places where people are still active after arming, you can choose infrared curtain detectors. 47) What should be paid attention to when installing the infrared detector? Answer: The front of the detector should not be blocked by objects, avoid moving objects into the detection viewing area, avoid cold and heat sources, avoid locations where small animals often move, and avoid facing the sun or the place where the sun reflects

• How is the gas detector connected to the valve

  1. How is the gas detector connected to the valve? Is it by an electrical wire or wirelessly? Answer: The gas detector and valve connected by control wire. There is 0.4m length wire 2×0.75mm2 Double core wire with the solenoid valve. It is used to connect the combustible gas detector with the solenoid valve. 2. How far can the valve be installed from the detector? Answer: The Valve is with connection wire of 0.4m length. If you need longer, you can add extend wire with same specification. 3. Can the valve be installed outside and the detector inside? Answer: Yes. But valves should be installed after the main intake valve for easy maintenance. 4. What is the maintenance required for the detector and the valve? The valve maintenance: It is recommended that users check the valve on and off regularly. To keep the Detector in good working condition. Test it every week using the Test button. Vacuum the detector cover at least twice a year, using the soft brush. Test the gas detector again after vacuuming. 5. What is the lifetime of the detector and the valve? Combustible gas adopts catalytic combustion sensors, and the general life of such sensors is about 3-5 years. Solenoid valve life depends on switch action times. Normally 5-8 years. 6. Are Vedard products available to purchase in Canada? We have online store at alarm store. Can ship to Canada. Refer to https://www.vedard.com/forum/how-is-the-gas-detector-connected-to-the-valve-t9424.html

• How to inspect residential alarm system?

  Residential alarm system inspection regulations: 1. Local alarm arm/disarm function: normal/abnormal Sound and light alarm: normal/silent/no light Backup power conversion function: Normal/Abnormal/None 2. Alarm printing function: normal/abnormal/none 3. Alarm control host and multimedia: Sound and light alarm: Normal/Abnormal/None Alarm address display: Normal/Abnormal/None Alarm storage: Normal/Abnormal/None 4. Area alarm host: networking alarm Normal/Abnormal/No special line/None 5. Emergency alarm networking alarm：Normal/Abnormal/No special line/None 6. Alarm response and linkage function： Alarm response time<=2s Camera linkage: Normal/Abnormal/None DVR/NVR linkage: Normal/Abnormal/None Lighting linkage: Normal/Abnormal/None Refer to https://www.vedard.com/forum/residential-alarm-system-inspection-t18350.html

• Questions of smoke detectors

  How to check smoke detector? Firstly check the LED status on the detector. Then place a lit cigarette within 10cm of the smoke detector and test whether the smoke detector alarms. The fire smoke detector has been keeping alarm because of the heavy dust. Can we turn down the sensitivity? No. you should not turn down the sensitivity. If there is a lot of dust in the environment, the smoke detector is not suitable for installation and should be replaced with a heat detector. Why the smoke detector should be installed at the return air place? In general, for the IDC room, the return air outlet is a necessary way of gas circulation.Therefore, it is necessary to set up a smoke detector here for smoke detection. But for the traditional point type smoke detector, the sensitivity is too low.The smoke is diluted by air currents.So the detection is very bad. For very early smoke detectors.Also known as aspirated smoke detectors or air sampling smoke detectors, this problem does not exist. it is actively inhaled into the inner detector. Refer to https://www.vedard.com/forum/question-of-smoke-detectors-t12541.html

• How to keep safe?

  Understand the common sense of home safety Understand the common sense of safety, you can understand what safety issues should be paid attention to in daily work, and enhance your awareness of prevention. Pay attention to fire prevention 1. Be aware of your location and make sure your passage is clear at all times. 2. Know the firefighting equipment and use method in your place of residence. 3. Do not overload electrical circuits. If additional indoor appliances are required, they must be installed by a qualified electrical technician. 4. Do not store any flammable and dangerous items indoors. 5. Family members should be indicated where the main power switch is located.In case of fire, cut off power in time. 6. When using gas, the window should be opened as far as possible, in case of gas leakage accident. When the gas is stopped, the main switch should be turned off. 7. Periodically check appliances, wires and pipes connected to gas. If any damage is found, replace it immediately. 8. If a fire breaks out, keep calm, report it to the fire department immediately, and indicate the correct point of fire. 9. Use different kinds of fire extinguishers for different kinds of combustibles. Burning of wood, paper, etc. should be extinguished with a pressurized hydraulic fire extinguisher. Burning of oil, fuel, gasoline and other flammable liquids should be extinguished with a dry powder or foam extinguisher. Burning of wires, electrical appliances and motors should be extinguished with dry powder or carbon dioxide fire extinguishers. Pay attention to burglary 1. Close the doors and Windows when you go out. 2. Put your home alarm on alert when you leave the house. 3. Raise the awareness of defense, do not let strangers into the corridor. 4. If a burglar breaks into your home, call the police and secure the scene.Or press the emergency button to alarm and call for help from the security management center. Refer to https://www.vedard.com/forum/understand-the-common-sense-of-home-safety-t15591.html

• Fire escape questions and answers

  Most of us think we know what a fire looks like. We've experienced that many times in movies and on TV. But if you and I acted like movie stars in the middle of a fire, we'd be dead soon. To illustrate this point, let's test your knowledge of fire safety. 1. You are sleeping upstairs when a burning wastebasket catches fire to the curtains in your living room. The fire runs up the walls. The smoke alarm goes off and the noise wakes you up. About how long you have to leave the house. A: 2 minutes B: 5 minutes C: 10 minutes D:15 minutes The correct answer is A. The National Fire Protection Council set fire to a wastebasket in the living room of an experimental house and recorded how long it took from the basket to start a fire. Two minutes later, the smoke alarm went off.Three minutes later, the living room temperature had risen to a death-threatening 500℉, and the downstairs room was filled with toxic smoke. Four minutes later, the upstairs and downstairs aisles were impassable. In a few moments, those who still in the house would be choked by the smoke or burned to death. 2. Suppose you were asleep and the smoke alarm went off, what would you do? A: Get out of bed quickly and see what's going on B: Call the fire department C: Lower your body and move slowly to the door The correct answer is C. Standing up straight in the event of a fire and smoke will kill you in a short time. One of the things that most people don't know about fires is that the temperature at the scene of a fire is very high. When I put on my fireproof suit and walked into a burning house at the New York City Fire School. I found that it was certain that I would die if I remained in a standing position. When it's 200 ℉ two feet above the floor, then it is 500 ℉ five feet above the floor and it is 800 ℉ on the ceiling. If I were still standing, I would soon be burned to death. In addition, the smoke will block your view. When we see the fire scene in the movie, everything is very clear. In a real fire, you can hardly see anything. You may become disoriented or even lose track of where the Windows and doors are in a room you've always lived in. If you try to breathe a few times, carbon monoxide gas can suffocate you. As the smoke and heat rise, the air close to the floor is cleaner and it is easier to breathe. 3. Suppose you are in your bedroom and you hear the smoke alarm. What should you do? A: Open the door quickly. B: Touch the door with the back of your hand to see if it's getting hot. C: Open the door slowly and look through the crack to know the situation outside. The correct answer is B. If the door is hot, the smoke and fire that come into the bedroom when you open the door can kill you. If the door is not hot, the fire may not be big enough, and you may be able to get out of the room the normal way. If you come across smoke on the stairs or in the hallway after leaving your room (be sure to close the door behind you to prevent the fire from spreading), stop immediately and do not try to escape from the fire. Do not hide in inaccessible areas such as attic floors or closets. Return to the room where the fire has not yet reached and close the door. The closed door will act as a temperature barrier. A standard wooden door gives you an extra 15 minutes, enough time to escape from the second route. Most buildings have metal doors that keep the fire out of reach, giving you more time. 4. Suppose you live on the 16th floor of a high-rise dormitory building. It is impossible to leave through a window, and the hallway is full of smoke. What should you do? A: Go back to your house and call the fire department. B: Put wet towels around the door. C: If you need air, open the window carefully and check the nearby fire first. D: Stay near the window and call the fireman for help. All above are correct. Do not use elevators unless instructed by the fire department. The power supply may short out, trapping you in the elevator.If you can't get out of the house, get down under the window so that you can get some fresh air.A wet towel on the door frame will prevent smoke from seeping in. 5. A guest at a party drops a cigarette between the cushions of your living room sofa. How long can the cigarette burn slowly before the sofa catches fire A: 15 minutes B: 30 minutes C: 1 hour D: More than 3 hours The correct answer is D. Careless smoking is the main cause of fire casualties.That's because it took so long to detect a cigarette fire. By the time the fire starts, people may have gone to sleep.Since smoking fires take longer to be detected, it is best to have a smoke alarm on the first floor of the house and outside every sleeping area. Many people think that if they fall asleep, the smell of smoke will wake them up. This is a mistake.The carbon monoxide gas contained in smoke can suffocate you before you even smell it. 6. A plate of butter is burning on the stove. How long do you have to put it out? A: 2 minutes B: five minutes C: 7 minutes D: In 10 minutes The correct answer is A. Don't try to put out the fire on the stove with water; it will make the burning butter fly all over the place. It is best to use a proper size fire extinguisher. You can also use a lid or baking soda to slowly smother the fire.If you haven't put the fire out in two minutes, leave the room. Almost everyone will encounter some form of fire in their life. Knowing about fire and how to deal with it is the best fire insurance you can get. Refer to https://www.vedard.com/forum/fire-escape-question-and-answer-t13860.html

• How to Prevent carbon monoxide poisoning during winter heating season

  For the way of closed doors and Windows and then burning coal stove to heat, it is very easy to produce carbon monoxide, resulting in human poisoning and death. What are the conditions that can cause carbon monoxide poisoning indoors in winter? 1. The indoor air is closed in winter, and when the coal stove is used for heating and cooking, the carbon monoxide will gather indoors due to poor ventilation, and the concentration is high to a certain degree, it will cause poisoning. 2. When the water heater that does not fight wind meets gale weather, can appear combustion is not stable or flaming out, exhaust gas is poured backward indoor wait for a problem, cause indoor carbon monoxide to exceed standard. In addition to carbon monoxide poisoning, risks such as explosions or fires from gas leaks should also be taken care of. Although carbon monoxide poisoning is often reminded of safety, but because people's safety awareness is not strong and lax safety awareness, accidents of carbon monoxide poisoning still occur occasionally. How to effectively prevent carbon monoxide poisoning and other safety accidents? The installation of carbon monoxide detection alarm (CO sensor), gas leak detection alarm, smoke alarm and so on is the best way to effectively prevent environmental safety accidents. Safety alarm can detect the existence of danger in time and issue a high-decibel alarm sound and high-brightness flash, So, it alerts or wake up the user to find the danger and take measures. People will encounter accidents in their life. The safety alarm timely reminds and links other equipment to cut off the gas source and other equipment, so as to protect our life safely. Refer to https://www.vedard.com/forum/prevent-carbon-monoxide-poisoning-during-winter-heating-season-t13879.html