1. Type of detection tube
The detection tube type gas detector employs an air pump to draw the gas into the detection tube. The detected gas reacts with the detection reagent in the detection tube to change the color of the reagent, allowing the user to judge the gas and its concentration in the surrounding area. The detection tube detects a whole spectrum of gases, which can compensate for the insufficient gas detection by other sensors. The detection results are visible to the naked eye on the scale of the detection tube. As a result, environmental protection departments frequently adopt the detecting tube detection method.
2. Electrochemical
The electrochemical sensor is a sensor technology that is now in use and is a relatively developed detection technology. The advantages of electrochemical sensors include their compact size, low cost, ability to be reused, and quick detection speed. The majority of gas detectors employ them.
3. Type of semiconductor
The detecting technology for semiconductor sensors is now rather archaic. The environment's gas reacts with the metal oxide or metal semiconductor oxide substance used in semiconductor sensors to produce conductivity or voltage. Safety features or surface potential shifts, a lack of technical stability in semiconductor sensors, and insufficient sensitivity are all problems. The cost-effectiveness of semiconductor sensors makes them ideal for civilian gas detection applications. It merely needs to determine whether a gas is present in the surrounding area. scenarios in which the presence of gas cannot be detected.
4. Ionization
The technology for ionization sensor detection is mostly utilized to identify different VOC gases produced by organic steam engines in the environment. It will be employed in a composite hazardous gas detector, which can detect multiple harmful gases simultaneously, rather than in a single toxic gas detector. It is also capable of detecting a variety of VOCs from different organic steam engines.
5. Catalytic combustion type
The catalytic combustion sensor's primary use case is the detection of flammable gas. A high temperature resistant catalyst coating is prepared on the sensor platinum resistor's surface. The combustible gas is detected and its concentration is determined by the surface-catalyzed combustion of the gas, which raises the temperature of the platinum resistor. Other non-flammable gases cannot be detected by the sensor; it is only effective for detecting combustible gases.
6. Infrared sensor type
To determine the concentration of a particular gas, infrared sensors primarily use the distinct properties of the absorption peaks of various gases in the mid-infrared region. Both the type of gas and the gas concentration can be reliably determined by this kind of sensor. Compounds and inert environments, infrared sensors can make the identification of flammable gases easier.
