Pump suction gas detection vs. diffusion gas detector differences
Gas detectors can be divided into pump type gas detectors and diffusion type gas detectors based on different sampling methods. The working principles of pump type and diffusion type gas detectors are basically the same, and the collected sample gas is detected through the instrument's sensors. And what are the differences between them? Below is an introduction for you.
What is a pump suction gas detector
The pump suction gas detector is a small gas pump built into the instrument, which is activated by the power supply to extract and sample the gas in the sampling point area, and then send the sample gas to the sensor for detection.
What is a diffusion type gas detector
A diffusion type gas detector is a device that slowly flows the gas in the detected area into the instrument with the free flow of air for detection. This method is influenced by the detection environment, such as ambient temperature, wind speed, etc.
Diffusion type gas detector
The difference between pump suction gas detector and diffusion gas detector
1. Sampling method
The sampling of a pump type gas detector is achieved by pumping air through an air pump, while the sampling of a diffusion type gas detector involves the free flow of air into the instrument.
2. Detection speed
Due to the influence of air flow rate on the sampling of diffusion type gas detectors, their detection efficiency is relatively slow, while the detection speed of pump type gas detectors is very fast.
3. Application occasions
The diffusion type is mainly used in open occasions, such as open workplaces, while the pump suction type can be used in special occasions, such as tunnels, pipelines, sewers, tanks, sealed containers, etc. that are not suitable for people to enter or cannot enter. The pump suction type can be connected to external accessories for remote sampling and testing.
4. Cost
The characteristic of diffusion type gas detectors is their low cost. Whether it is manufacturing or later maintenance costs, diffusion type gas detectors are much lower than pump suction type.
