Gas detectors are classified by sampling method
There are diffusion type and pump suction type: the usage rate of diffusion gas detector is very common, while the price of pump suction gas detector is relatively high, mainly for special places.
Diffusion gas detector: The gas in the detected area slowly flows the sample gas into the instrument with the free flow of air for detection, and it needs to be placed on site. This method is affected by the detection environment, such as ambient temperature, wind speed, etc., and is not suitable for air sources with low pressure. The advantage of the diffusion gas detector is that the cost is lower than that of the pump suction type.
Pump-suction gas detector: The instrument is equipped with a gas sampling pump. Its working method is that the power supply drives the gas sampling pump to extract and sample the gas in the area to be measured, and then send the sample gas into the instrument for detection. The pump-suction gas detector is characterized by fast detection speed, long-distance measurement of dangerous areas, and maintenance of personnel safety. It is suitable for occasions where the gas detector cannot be placed on site, and where there are special requirements for response speed and pressure difference.
