The portable gas detector can be divided into two types: diffusion-type and pump-type.The portable, as the name implies for easy to carry and design, mobile, flexible applications.We need to consider in choosing which field of application is suitable for the portable instrument.
Portable gas detector should have the following functions:
Direct reading digital screen, can quickly display the current gas concentration.
With record storage, the sampling interval can be set and the current concentration data can be recorded automatically.
With sound and light, vibration alarm.
A rechargeable lithium battery or a replaceable battery supply power for more than a few hours.
The weight and volume: many portable gas detectors are with different volume size and weight, we need to consider the appropriate volume and weight according to their use application.
The working principle of the portable gas detector is as follows: diffusion sampling and pumping sampling.
1. The diffused type consumes less power, and the equipment volume can be made smaller.The detection of gas is similar to the olfactory mode of human body.
2. pump suction type, because it use pumping sampling work mode, the power consumption and volume must be larger and heavy, but with the help of the air pump pumping sampling can be rapid, accurate location to detect the leak point.It is more suitable for the extraction sampling and testing conditions, such as the gas concentration in the pipeline and the gas concentration in the sealed space, where are more convenient for the use and testing of the pump type gas detector.