1. Diffusion sampling

The diffusion gas detector detects gases by slowly flowing them into the instrument through natural air flow, following the free flow of air, in order to obtain results.

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. 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

A pump suction gas detector is an instrument with a built-in micro suction pump. The air pump is powered on to extract and sample the gas in the sampling point area, and then the sample gas is sent into 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. 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. Fast detection speed and relatively high accuracy. The pump suction gas detector has the advantage of being able to measure remotely.

3. Pipeline sampling

In addition to diffusion and pump suction sampling methods, fixed gas detectors also have a pipeline sampling method.

The pipeline gas detector has a thread on one end of the probe, and a hole of the same size is opened in the pipeline during installation. The probe is tightly connected to the pipeline without 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.

The above is about the sampling methods of gas detectors. Gas detectors are mainly used for rapid detection of toxic and harmful gases in the ambient air on site. They are suitable for emergency (leak) accident monitoring, toxic and harmful gas detection in occupational health places, safety detection in petrochemical enterprises, and leakage detection in storage tanks, pipelines, valves, and other scenarios.

Zhengzhou Huiruipu Electronic Technology Co., Ltd. is a professional manufacturer specializing in gas detection and alarm devices, flammable, explosive, toxic and harmful gas detection and alarm equipment, environmental monitoring and analysis instruments, and providing complete industrial safety and environmental monitoring system solutions. It is a national high-tech company integrating research and development, design, production, manufacturing, sales and service. The company is committed to becoming the most professional on-site detection instrument and system solution supplier in China. If you have such needs, please feel free to contact Huiruipu!