What are the principles of gas detectors?
The installation height of the detector shall be determined according to the density of the gas to be tested. For the density greater than the air, the installation height shall be 0.3 to 0.6m from the floor (or floor, floor). If the area is frequently washed with water or often snowed, the detector should be installed to ensure that the sensors are not wetted or buried by snow.
The installation of the detector is not too close to the ground and the wall, leaving no clearance of less than 0.3m. When the calibration is convenient, the air hood is installed. In addition, the wall surface is easy to absorb toxic gas, and release with the change of temperature and humidity, which will affect the normal work of the sensor.
The combustible gas detector is a catalytic combustion type alarm. The principle is that the catalytic type combustible gas sensor uses the resistance change of the refractory metal platinum wire to measure the concentration of the combustible gas. When combustible gas enters the detector, it causes oxidation reaction on the platinum wire surface (flameless combustion), and the heat generated by it increases the temperature of platinum wire, while the resistivity of platinum wire changes.
