Three must-know sampling and detection methods of gas detectors
Gas detector is a dangerous gas protective equipment. It can detect the concentration of toxic and harmful substances in our work. When the gas concentration passes the safety line, it will issue an alarm, effectively reminding operators. The gas detector has three sampling and detection methods. Let's take a look together~
1. Diffusion sampling
The diffusion gas detector uses natural airflow to slowly introduce gas into the instrument for detection, along with the free flow of air, in order to obtain results.
The diffusion gas detector can detect the presence of toxic and harmful substances in the air in real time and accurately. Diffusion gas detectors are typically used in open spaces, such as open workshops. This method is affected by environmental factors such as temperature and wind speed. Due to the lack of a suction pump, the sampling speed of the diffusion gas detector is slow, and the detection results are easily affected by external factors such as wind speed and temperature in the detection environment, resulting in certain errors in the results.
2. Pump suction sampling
The pump suction gas detector is equipped with a miniature suction pump. The air pump is powered on to extract gas from the sampling point area, and then the sample gas is sent to the gas detector for detection.
Pump suction gas detectors are generally suitable for places that are not suitable or easy for people to enter, or places that must be tested before operators enter. Such as tunnels, pipelines, sewers, agricultural enclosed grain warehouses, railway tankers, tanks, etc., pump suction detectors can be installed on air pumps with long pipes for ventilation and remote suction sampling. Fast detection speed, high accuracy, and the ability to measure remotely are the advantages of pump suction gas detectors.
3. Pipeline sampling
In addition to diffusion and pump suction sampling, fixed gas detectors also have a pipeline sampling method.
The pipeline gas detector has a thread on one end of the probe. During installation, open an opening of the same size on the pipeline, and tightly connect the probe to the pipeline without any air leakage. Thus achieving real-time detection inside the pipeline. The pipeline detector is suitable for environments with low pipeline flow rate and normal temperature and pressure.
