Classification of combustible gas detectors and the importance of maintenance
Semiconductor gas detector
At a certain temperature, the conductivity changes with the change of ambient gas composition. For example, the alcohol detector is prepared based on the principle that when tin dioxide encounters alcohol gas at high temperatures, the resistance will decrease sharply.
Semiconductor gas sensors can be effectively used to detect many gases such as methane, ethane, propane, butane, alcohol, formaldehyde, carbon monoxide, carbon dioxide, ethylene, acetylene, vinyl chloride, styrene, acrylic acid, etc. In particular, this kind of sensor is low in cost and suitable for civil gas detection needs.
Catalytic combustion gas detector
The chemical combustion sensor consists of two fixed resistors forming a Wheatstone detection bridge. When the flammable mixed gas diffuses to the detection element, it rapidly undergoes flameless combustion and generates reaction heat, which increases the resistance of the hot wire and the bridge outputs a changing voltage signal. The size of this voltage signal is related to the resistance of the flammable gas. proportional to the concentration. Its advantages are: good selectivity, accurate response, good stability, capable of quantitative detection, not prone to false alarms, reliable control, and a lifespan of about three years. It is mainly suitable for the detection of flammable gases. At present, most combustible gas detection in the world uses this type of sensor.
The Importance of Maintenance of Combustible Gas Detectors
Because the working environment of flammable gas detectors is relatively harsh, they generally need to be installed outdoors. Outdoors, they are often exposed to wind and sun, and they are surrounded by various polluted gases, which will also enter into the detector, and this is unavoidable. We can regard this situation as an objective form of damage. These damages will have a certain impact on our data. In order to better utilize its value, we need to pay special attention to maintenance and upkeep to minimize the possible obstruction of the flammable gas detector, thereby ensuring the detection accuracy. The correct value of the data, so it is very important to clean and maintain the flammable gas detector, which is an important measure for protection.
Of course, if the combustible gas detector is not regularly maintained, it will also increase its aging speed. For enterprises, the loss cost of industrial devices is also very high. Enterprises must remember that they must not forget to replace equipment after a period of time to avoid losses to the enterprise.
