When it comes to the early fire start emergency signal, everyone responds in the front, which is the air sampling type. Such products basically use photoelectric detection, which is mainly used in clean occasions, otherwise they are prone to be disturbed by water vapor and dust and false alarm. Dust and water vapor are large particles. The particle size of dust is generally more than 10um, and the particle size of water vapor is 3-10um. Of course, the particle size of water vapor is affected by air pressure Temperature has a great influence. At present, in air sampling products, filters are used to reduce the interference of dust and moisture. The filter aperture is generally 40um, and some manufacturers also use 20um. These filters have a certain effect on dust and low concentration water vapor, but they cannot completely eliminate the impact of water vapor and dust, let alone the impact of PM10 and PM2.5.
PM2.5 is mainly composed of smoke, which is the same as the smoke generated in fire. Generally, PM2.5 accounts for 30% - 80% of PM10. When photoelectric smoke detection is used, the comprehensive particle size of PM10 in the air becomes larger, for example, the comprehensive particle size is more than 1um, while the general smoke particle size range is 0.1um - 1um. Therefore, the impact of PM10 and PM2.5 on the early fire start emergency signal can be eliminated or reduced by adopting appropriate methods.
Shanghai Dianyao Launches High Sensitivity Smoke detector , which is different from the traditional smoke detector when aspirating. The smoke detection range of the detector can reach 0.001% m-5000% m. The more advantageous electronic filter screen technology is used to effectively prevent false alarms of non smoke particles such as dust, moisture, etc. It has a wide measurement range, especially suitable for early fire detection. In addition, RESDA smoke detector has 232 interface (TTL), which is used for production commissioning. It can communicate with the upper computer. With special software, it can monitor all kinds of information online in real time. The smoke detector is an ideal fire smoke activated emergency annunciator. At present, this technology is at all levels and has applied for * * *. As the highlight of the market, we provide customers with better products and services with high standards and requirements, and look forward to your patronage!
I brief introduction
Reliable Early Smoke Detection A pp aratus） Smoke detector is mainly used to detect fire smoke and start emergency signal. It has the following main characteristics:
★ Blue light technology is adopted, combined with the electronic filter screen technology in most countries, the filter screen aperture size can be adjusted by software, which can automatically remove dust, moisture and other interferences. At present, it is a smoke detector with high detection sensitivity and strong anti false alarm ability.
★ Digital voice plays for a long time, with loud and clear voice, which can be divided into prompt tone and warning tone. (Optional relay Output)
★ Infrared remote control operation.
★ High, medium and low sensitivity can be set.
★ It has voice automatic prompt and manual prompt functions.
★ Up to three smoke control modes: automatic, display locking and voice locking.
★ PM2.5 monitoring can display PM2.5 in real time, one hour and one day.
★ Multiple equipment can be networked for operation.
II Main technical indicators
content | Specific parameters |
Power Supply Voltage | DC12V |
Power supply current | 1A or 2A |
Smoke detector current | < 20mA |
Voice start emergency annunciator static current | < 30mA |
Play current of voice start emergency annunciator | < 300mA |
Long voice playback time | 4 minutes |
Smoke detection sensitivity | 0.0002%m/obs |
Smoke start emergency signal sensitivity | 0.005%m/obs—0.320%m/obs |
Smoke measurement range | 0.0002%m/obs—800.0000%m/obs |
PM2.5 measurement range | 1ug/ M three —5000ug/ M three |
ambient temperature | -10℃—50℃ |
relative humidity | <95% RH (non condensing) |
3、 Technical characteristics
one Same appearance
In order to facilitate installation and use, the shell of RESDA smoke detector is the same as that of ordinary smoke detector (if the smoke control function is not required, the no smoking sign can be removed).
two Different connotation
2.1 Comparison of internal circuit diagram between RESDA smoke detector and ordinary smoke detector
2.2 Back PC B circuit comparison
It can be seen from the above figure that the internal circuit of RESDA smoke detector is much more complex than that of ordinary smoke detector. In order to achieve very high sensitivity and realize the function of self created electronic filter screen, the circuit requirements are certainly much higher.
three , completely different effect
Compare items | RESDA smoke detector | Ordinary smoke detector |
measuring range | 0.0002%m/obs—1000.0000m/obs | 5.0%m/obs—15.0m/obs |
Start emergency signal threshold | 0.0125m/obs | 5.0%m/obs |
Eliminate dust false alarm | sure | may not |
Eliminate false alarm of water vapor | sure | must not |
Eliminate false alarm of smoke and dust above 2.5um | sure | may not |
Soothing the impact of PM2.5 | sure | may not |
PM2.5 measurement | sure | may not |
Infrared remote control function | have | Not available |
Realize smoke measurement | sure | may not |
Anti pollution | sure | No, it needs to be cleaned regularly |
It can be seen from the above table that the sensitivity of RESDA smoke detector is thousands of times that of ordinary smoke detector, and the sensitivity of available emergency signal (threshold value of emergency signal) is 400 times that of ordinary smoke detector. The ability to prevent false alarm completely promotes ordinary smoke detector; Its performance has exceeded that of the earlier fire smoke detectors widely used at present, and its price is only about 1/100 of that of air sampling. In terms of detection performance and anti false alarm ability, it has reached all levels; It is a real revolution in the field of photoelectric smoke detection, and is suitable for occasions where there is much dust and water vapor and early smoke detection is required.
four Independent intellectual property rights
4.1 Source of anti false alarm capability and basis of electronic filter screen: a method and device for identifying and measuring smoke particles
4.2 Guarantee of high sensitivity: a high sensitivity smoke detection device
five infrared remote control
six Networking operation
Multiple detectors and voice activated emergency annunciators can be networked for operation, and the distance of remote connection can reach 1000 meters.
