Understanding the difference between a pump-type gas detector and a diffusion-type gas detector is essential for choosing a gas detection device that is suitable for a specific environment.
The pump-type gas detector has a built-in small gas sampling pump that can actively extract the gas in the test area for detection, so the detection speed is fast and it is suitable for use in hazardous areas or places that are not easily accessible to people, such as tunnels, pipelines, sewers, agriculture, sealed granaries, railway tank cars, tanks, etc. In these environments, it is difficult for the gas to diffuse naturally, and the pump-type detector can ensure the accuracy of the detection by actively inhaling the gas. In addition, the pump-type detector can be equipped with a long ventilation pipe on the gas pump for long-distance sampling, which is suitable for some difficult-to-access detection areas. This is its advantage: it can measure and respond quickly to leakage exceeding the standard at a long distance. However, due to the built-in gas pump, the price is relatively high.
Diffusion detection is suitable for open spaces and well-ventilated environments. In these environments, the gas can diffuse more freely, and the detection instrument can more accurately reflect the gas concentration in the surrounding environment. At the same time, since it does not require external power equipment, the diffusion detection instrument has higher safety in some special occasions, such as inflammable and explosive environments. And the cost is low, suitable for open environments, such as open workshops. The disadvantage is that the sampling speed of the diffusion chamber detector is slow and easily affected by environmental factors such as wind speed and temperature.
1.Summary of pump-suction detector features:
(1). External pump force is required: Pump-suction detectors usually require built-in or external pump force to absorb surrounding air for detection.
(2). High sensitivity: Compared with the diffusion detector, the pump-suction type has higher sensitivity and accuracy and can detect lower
concentrations of gas.
(3). Good real-time performance: The pump-suction detector has a faster response speed and can provide gas concentration data in a shorter time.
(4). High cost: Due to the built-in pump or external pump and other components, the cost of the pump-suction detector is higher than that of the diffusion detector, and the maintenance cost is relatively high.
2.Summary of the characteristics of diffusion gas detectors:
(1). No external pump force is required: Diffusion gas detectors do not require external pump force and rely only on the natural diffusion of the target gas in the environment for detection.
(2). Simple and portable: The equipment structure is simple and lightweight, easy to carry and use, and suitable for temporary or mobile detection.
(3). Poor real-time performance: Due to its reliance on the natural diffusion of gas, the reaction speed of the diffusion detector is relatively slow and it is not suitable for rapidly changing environments.
(4). Low cost: The diffusion detection instrument has a simple structure, relatively low cost, and relatively low maintenance cost. In general, it is only necessary to calibrate and clean the sensor regularly.
In summary, when choosing which type of detector to use, it should be decided according to the specific detection environment and needs. But whether it is diffusion or pump suction, it plays an important role in the field of gas detection and provides strong technical support for protecting people's life and property safety and environmental quality.