What are the application types of combustible gas detectors and what occasions are they used for?
1. Semiconductor gas detector:
At a certain temperature, the electrical conductivity changes with the change of the ambient gas composition. For example, the alcohol flammable gas detector is manufactured by using the principle that the resistance of tin dioxide will decrease sharply when it encounters alcohol gas at high temperature.
Semiconductor gas sensors can be effectively used for the detection of many gases such as methane, ethane, propane, butane, alcohol, formaldehyde, carbon monoxide, carbon dioxide, ethylene, acetylene, vinyl chloride, styrene, and acrylic acid. In particular, the sensor has low cost and is suitable for the needs of civil gas detection.
2. Catalytic combustion gas detector:
The catalytic combustion sensor is a Wheatstone detection bridge composed of two fixed resistors. When the flammable mixed gas diffuses to the detection element, it rapidly burns without flame, and generates reaction heat, which increases the resistance value of the hot wire, and the bridge outputs a changing voltage signal. proportional to the concentration. Its advantages are: good selectivity, accurate response, good stability, quantitative detection, not easy to produce false alarms, reliable control, and a life span of about three years. It is mainly suitable for the detection of flammable gas.
3. Other related combustible gas detectors:
1. The portable combustible gas detector adopts the natural diffusion method to detect gas concentration, and uses a catalytic combustion sensor, which has excellent sensitivity and excellent repeatability; the combustible gas detector adopts embedded micro-control technology, with simple menu operation, complete functions, and reliability. High performance, the performance of the whole machine ranks the leading level in China. It is suitable for flammable gas leakage rescue, underground pipelines or mines and other places, which can effectively ensure that the life safety of the staff is not infringed, and the production equipment is not damaged. The shell of the combustible hand-held watch is made of high-strength engineering materials and composite elastic rubber materials, with high strength and good hand feeling.
2. The online combustible gas detector is composed of a gas detection alarm controller and a fixed combustible gas detector. The gas detection alarm controller can be placed in the duty room and mainly controls each monitoring point. The combustible gas detector is installed in the most For leak-prone locations, the core component is the built-in gas sensor. The combustible gas detector converts the combustible gas concentration detected by the sensor into an electrical signal, and transmits it to the combustible gas alarm controller through a cable. The higher the gas concentration, the stronger the electrical signal. When the gas concentration reaches or exceeds the alarm controller set At the point of time, the alarm will send out an alarm signal, and the external equipment such as solenoid valve and exhaust fan can be activated to automatically eliminate hidden dangers.
