What is the difference between diffusion-type and pump-suction-type gas detectors?
Portable gas detectors, as commonly used gas detectors, can be divided into diffusion gas detectors and pump suction gas detectors based on their sampling methods. Do you know the difference in classification between these two types of detectors?
The pump suction gas detector uses a small gas sampling pump driven by a power source to extract and sample the gas in the test area, and then sends the obtained gas into the gas detector for detection and analysis.
It is generally suitable for places that are not suitable or easy for people to enter, or places where testing must be conducted before operators enter. For example, in tunnels, pipelines, sewers, agricultural enclosed grain warehouses, railway tankers, tanks, etc., pump suction detectors can be installed on air pumps with long ventilation pipes for remote suction sampling. The pump suction gas detector has the advantages of fast detection speed and long-distance measurement, but due to the loading of an air pump, the production cost is increased.
A diffusion gas detector uses natural air flow, with some of the air flowing into the interior of the detector. This allows the detector to analyze the incoming gas and obtain results. Compared to a pump suction gas detector, a diffusion gas detector has a slower sampling speed due to the lack of a suction pump, and its detection results are more susceptible to external factors such as wind speed and temperature in the detection environment, resulting in certain errors. However, the production cost is relatively low.
Diffusion gas detectors can accurately and real-time check whether the air contains toxic and harmful substances. Generally, diffusion gas detectors are used in open environments, such as open workshops. This method is affected by the detection environment, such as ambient temperature, wind speed, etc.
