Alarm

Toxic gases are mainly poisonous gas chemicals or highly volatile substances at room temperature and pressure. They are usually originated from industrial pollution, combustion of coal and oil, and decomposition of biological materials. Toxic gases have stimulating effect on the respiratory tract and also easy cause poison by inhalation. Exposure to the toxic gas and harmful substance in the working and general environment may induce serious heath effects and even death. Severe leaking accidents will threaten civil safety in wide range due to quick spreading speed. Therefore, Detecting and alarm device with targeted sensors are very important to equipped in these industrial occasions to ensure safe operation.

1.Industrial toxic gas alarm

Common toxic gases can be divided into respiratory irritating and asphyxiant according to their physical and chemical characteristics

Irritant gases: such as chlorine, ammonia, hydrogenfluoride, methyl mercaptan, dimethyl sulfide, etc.Asphyxiant gases: such as nitrogen, carbon monoxide, hydrogen sulfide, etc.

Hazardous gas sensors are equipped on detecting and measuring device like portable detectors or fixed meters as to prevent harmful gas leakage risks in underground pipes, metallurgy, power plant, chemical factories, tunnels, etc. Workers life safety can be guaranteed and production facilities protected from damage.

  • Detection of various gas types
  • Good selectivity, strong anti-interference ability
  • Good linearity, quantitative detection
Modle Detection principle Detection gas Detection Range

ZE03
Module, electrochemical CO,O2,NH3,H2S,NO2,O3,SO2, CL2,HF,H2,PH3,HCL, etc. See manual

ME3-NH3
Electrochemical NH3 0-100ppm, Max 200ppm

ME3-H2S
Electrochemical H2S 0-100ppm, Max 500ppm

ME3-ETO
Electrochemical C2H4O 0-20ppm, Max 100ppm

ME3-CL2
Electrochemical CL2 0-10ppm, Max 100ppm

ME3-HF
Electrochemical HF 0-10ppm, Max 100ppm

ME3-C6H6
Electrochemical C6H6 0-100ppm, Max 500ppm

ME3-C7H8
Electrochemical C7H8 0-500ppm, Max 1000ppm

2.Industrial combustible gas alarm

There are many types of combustible gases in the industrial field. Generally speaking, sensors are used in portable detectors or online detectors, and there are also a variety of different options for different detection objects and application terminals

The infrared principle based sensors are suitable for the detection of hydrocarbons;

The catalytic principle based sensors are suitable for the detection of flammable and explosive gases within the lower explosion limit range and organic vapors in petroleum, chemical and other industrial fields. Detectable gases include: alkane gas, alkyne gas, organic vapor such as alcohol, ether, aldehyde, ketone, benzene, toluene, xylene, gasoline, diesel and other organic vapor.

  • Wide measurement range, multiple ranges optional
  • High sensitivity, stable performance
  • Excellent after-sales technical support
Modle Detection principle Detection gas Detection Range

MH-440D
non-dispersive infrared (NDIR) principle CH4 0~10% Vol optional

MH-742B
non-dispersive infrared (NDIR) principle Combustible gas 0~100% Vol optional

3.PIR infrared alarm

Intrusion preventive infrared alarm is composed of pyroelectric infrared sensor, alarm controller and other parts. When someone enters the range to be protected, the sensor will generate an electrical signal transmitted to the controller, and the controller send the processed alarm signal to the terminal.

Any object above the absolute temperature produces electromagnetic radiation - infrared, but the wavelength and energy radiated by various objects are different. Most of the infrared radiation produced by the human body is in the wave band of 7 to 14 um, and its peak wavelength is around 9.4 um.As long as there are people within a certain distance, the sensor can respond accordingly, which is the purpose of the security system..

  • Detection of multiple purpose
  • Stable performance
  • Excellent after-sales technical support, certification support available
Modle Detection principle Detection gas Detection Range

RD-624
analog output, high sensitivity, anti-interference, and excellent signal to noise ratio. human body induction pyroelectric effect

RD-623
analog output, large detection range, high sensitivity, anti-interference, and excellent signal to noise ratio. human body induction pyroelectric effect

RDB223
1. High-precision AD signal process. 2. Differential signal input mode,anti-interference ability. 3. Wide voltage power supply and power consumption. 4. Digital TTL signal outp human body induction pyroelectric effect

RDB224
Delay time adjustment function human body induction pyroelectric effect

ZRD-09
1、Automatic Induction;2、Photo-resistor control;3、Two trigger modes;4、Induction blocking time;5、High-level output Induction signal pyroelectric effect

4.Household gas alarm

Household gas alarm is a device used to detect whether fuel gas natural gas leaks in the home, generally installed in the kitchen. When the gas concentration in the air exceeds the preset value, it will trigger the alarm, sending out sound and light alarm signals. If connected to the alarm host and alarm center, it can also be connected to alarm network, and automatically close the gas valve, open the exhaust device to ensure the safety of life and property.

Household gas alarm mainly uses semiconductor, flat semiconductor, catalysis, MEMS sensor as detection element. Semiconductor and catalytic elements have features of low-cost, easy to develop, and are widely used in household gas alarms. NEMS application on the market is increasing year by year due to its small size, low power consumption, and easy integration.

  • Stable performance and good repeatability
  • High sensitivity, quick response
  • Perfect after-sales technical support, certification support available
Modle Detection principle Detection gas Detection Range

GM-202B
Semiconductor、MEMS C2H5OH,smoke 10-1000ppm

GM-402B
Semiconductor、MEMS CH4,C3H8 1-10000ppm

MQ-2
Semiconductor Flammable gas,Smoke 300-10000ppm(Flammable gas)

MQ-5
Semiconductor LPG,CH4 CH4、C3H8(300-10000ppm)

MQ-7B
Semiconductor CO 10-500ppm

MP-2
Semiconductor C3H8、smoke 200~10000ppm

MP-4
Semiconductor CH4,Nature gas,Marsh gas 300-10000ppm

MP-5
Semiconductor LPG,C3H8 300-10000ppm

MP-7
Semiconductor CO 50-1000ppm

MP-9
Semiconductor CO,CH4 50-1000ppm(CO),300-10000ppm(CH4)

MC105
catalytic combustion Combustible gases such as domestic natural gas,LPG,coal gas,CH4,C3H8 and so on 0-100%LEL

MC106
catalytic combustion Combustible gases such as non-industrial natural gas,LPG,coal gas,CH4,C3H8 and so on 0-100%LEL

MC107
catalytic combustion Combustible gases such as domestic natural gas,LPG,coal gas,CH4,C3H8 and so on 0-100%LEL

5.Underground gas alarm

Gas safety detection runs through the whole process of mine production, processing and transportation, such as the detection of gas, carbon monoxide (CO), hydrogen sulfide (H2S), carbon dioxide (CO2), sulfur dioxide (SO2), oxygen, etc. And the detection of sulfur dioxide, hydrogen sulfide, carbon monoxide, chlorine, ammonia and other gases in coal processing such as coking industry, coal gasification - synthetic ammonia, coal-based methanol, coal-to-synthetic oil, coal chemical cogeneration and other industries.

In the field of coal mines, catalytic elements are mainly used to detect the lower limit of gas explosion, mainly measuring 100% LEL. In recent years, infrared gas sensors have been gradually used in high-end gas detection products in the coal mining industry due to its good selectivity, anti-poison ability with a detection range of 100% VOL.

  • Low power consumption
  • Easy integration use
  • Highly stable & sensitive performance
Modle Detection principle Detection gas Detection Range

ME2-CO
Electrochemical CO 0-1000ppm,Max 2000ppm

MQ-7B
Semiconductor CO 10-500ppm

ZE07
Module, Electrochemical CO 0~500ppm

MP-7
Semiconductor CO 50-1000ppm

ZE15
Module, electrochemical CO 0-500ppm

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