Which gases are detectable by portable gas detectors?
Portable gas detectors can detect more gases. It can detect flammable gases and toxic and harmful gases.
1. Combustible gases: such as hydrogen (H2), carbon monoxide (CO), methane (CH4), ethane (C2H6), propane (C3H8), butane (C4H10), ethylene (C2H4), propylene (C3H6), butene (C4H8), acetylene (C2H2), propyne (C3H4), butyne (C4H6), hydrogen sulfide (H2S), phosphine (PH3), etc.
2. Toxic and harmful gases: chlorine, ammonia, nitrogen oxides, phosgene, hydrogen fluoride, sulfur dioxide, sulfur trioxide, dimethyl sulfate, nitrogen, methane, ethane, ethylene, carbon monoxide, nitrobenzene vapor, hydrogen cyanide , hydrogen sulfide, etc.
What are the types of common gas detectors?
The principle of gas detector can be divided into: diffusion type, pump suction type. The so-called diffusion type is to place the probe in the dangerous zone of detecting gas, and the gas to be measured diffuses into the probe from the space, and the alarm is placed in the monitoring room for indication and alarm. The pump suction type is to pump the gas to be measured into the detection probe. The suction pump is set together with the built-in gas detector. The detector is set at the dangerous place of the gas to be measured, so as to detect and execute the instruction and alarm functions.
According to the type of detected gas, it can be divided into: toxic gas detector and combustible gas detector;
Detectors that respond to single or multiple combustible gas concentrations. The smart sensor transmitter used in the detector is a fully functional combustible gas sensor transmitter. Among them, the infrared flammable gas detector is an ideal choice in the following application environments: frequent exposure of catalytic poisonous gas, frequent high flammable gas emissions, anoxic environment, and environments where detection is not easy to achieve
According to the detection method, it can be divided into: natural diffusion gas detector and pump suction gas detector;
Diffusion gas detector: The gas in the detected area slowly flows the sample gas into the instrument with the free flow of air for detection, and it needs to be placed on site. This method is affected by the detection environment, such as ambient temperature, wind speed, etc., and is not suitable for air sources with low pressure. The advantage of the diffusion gas detector is that the cost is lower than that of the pump suction type.
Pump-suction gas detector: The instrument is equipped with a gas sampling pump. Its working method is that the power supply drives the gas sampling pump to extract and sample the gas in the area to be measured, and then send the sample gas into the instrument for detection. The pump-suction gas detector is characterized by fast detection speed, long-distance measurement of dangerous areas, and maintenance of personnel safety. It is suitable for occasions where the gas detector cannot be placed on site, and where there are special requirements for response speed and pressure difference.
According to the detection quantity, it can be divided into: single gas detector and all-in-one gas detector. the
Single gas detector: adopts high-performance catalytic combustion sensor, which can be used in petrochemical, environmental accidents, natural gas, liquefied petroleum gas, coal gas and other industries to detect various combustible gases, including: alkanes, liquefied petroleum gases, natural gas, hydrogen, etc. .
All-in-one gas detector: a detection instrument that can be configured with a single gas or multiple gas sensors, and can be configured with a single, two-in-one, three-in-one, four-in-one or optional four toxic gas sensors or optional single gas sensor to test.
