What types of combustible gas detectors are there?
1. Portable combustible gas detector:
It generally uses natural diffusion to detect flammable gases, and the sensors used in the detector also have high sensitivity. In addition, most combustible gas detectors also use embedded microcontroller technology, making the instrument easy to operate and having multiple functions, which can also improve the efficiency and accuracy of the detector to a certain extent.
2. Pump suction combustible gas detector:
Its detection principle is to use a built-in suction pump, which can quickly measure the concentration of combustible gases in the working environment. And the pump suction combustible gas detector adopts catalytic combustion sensors, which also have real-time display of measurement data on the screen and accurate sound and light alarm prompts, providing guarantee for workers to successfully detect gases in unfavorable working environments, while ensuring personal safety.
3. Online combustible gas detector:
The structure of an online combustible gas detector consists of an alarm and a combustible gas detector. Generally, we place the gas detection alarm in the duty room, while the fixed combustible gas detector is installed in a location where gas is prone to leakage. When the gas concentration exceeds the normal range, the instrument will automatically send an alarm signal and activate equipment such as solenoid valves and exhaust fans to automatically eliminate hidden dangers.
Working principle of combustible gas detector
The principle of catalytic combustible gas detector is to measure the combustible gas by the resistance change generated by heating the refractory metal platinum wire. When combustible gases in the environment enter the detector, oxidation reaction (flameless combustion) will occur on the surface of the platinum wire. The heat generated in this process will raise the temperature of the platinum wire, causing a change in its electrical resistivity. Therefore, when the combustible gas detector encounters high temperatures and other factors that cause changes in the temperature of the platinum wire during use, the electrical resistivity of the platinum wire will also change, and the measured data will also show certain differences.
