Several classification criteria for gas detectors
A gas detector is an instrumentation tool for gas leakage concentration detection. It mainly utilizes gas sensors to detect the type of gas present in the environment. Gas sensors are sensors that are used to detect the composition and content of gases. It is generally accepted that the definition of a gas sensor is categorized on the basis of the detection target, that is to say, any sensor that is used to detect the composition and concentration of a gas is called a gas sensor, regardless of whether it is physically or chemically .
There are several classifications of gas detectors as follows:
① gas detector classification according to the detection object classification, there are combustible gas (including methane) detection alarm, toxic gas detection alarm, oxygen detection alarm.
② classification by detection principle, combustible gas detection catalytic combustion type, semiconductor type, thermal conductivity and infrared absorption type, etc.; toxic gas detection electrochemical type, semiconductor type, etc.; Oxygen detection electrochemical type, etc..
③ According to the use of classification, there are portable and fixed.
④ According to the use of place classification, there are conventional and explosion-proof type.
⑤ Classified by function, there are gas detector, gas alarm and gas detection alarm.
⑥ According to the sampling method, there are diffusion type and pump suction type.
Technical points of gas detector
For many units gas detection is one of the very important procedures, many production processes need to use potentially toxic gases, as well as some of the processes will produce some dangerous gas by-products. With regular maintenance and monitoring, such hazards can be detected early and minimized.
The best feature of the portable gas detector is that it can detect a wide range of gases by replacing the sensor module. Instead of purchasing a separate unit for each type of gas, one detector can detect over 30 different gases or vapors in combination with different sensors, which are plug-and-play and do not need to be recalibrated.
The sensors use new lightweight sensor modules, each of which is a composite unit containing a sensor, amplifier and memory module. Based on this design, each sensor module can be independently calibrated and plug-and-play, so that if it is installed in a main unit and the appropriate calibration data is entered into the microprocessor, no further adjustments are required, and the sensor does not need to be calibrated again each time it is changed for future gas measurements.
