Gas Alarm

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

MEu-CO,ME3-HCL,ME3-C2H6S,ME3-C2H6S2,ME3-C3H9N,ME3-C8H8,ME3-CH2O

Model	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

MC112,MC113,MC114,MH-741A

Model	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

RDB226-S

Model	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

Model	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

MC112,MC113,MC114,MH-741A

Model	Detection principle	Detection gas	Detection Range