With the development of science and technology, the portable gas detector technology is more and more advanced, and the product types are more and more, especially the products on the market are so full of eyes, which often make consumers pick the eye. Today we will briefly describe the types of portable gas detectors, so that we have a clear understanding.

CD4 gas detector

Portable gas detectors can be used for hazardous gas detection, organic voc gas detection, flammable gas detection, single gas detection, and more. Through the detection can accurately make judgments, currently in the field of accident detection, elimination, industrial safety monitoring, indoor air quality testing, hazardous substances testing, environmental protection monitoring and other fields have been widely used. The common categories are as follows:

First. Classification by sampling principle

Portable gas detectors can be divided into diffusion type and pumping type according to the sampling principle.

Diffusion is to place the probe in the danger zone where the gas is detected. The gas to be measured is diffused into the probe, and the alarm is placed in the monitoring room for indication and alarm.

Features: The advantage of a diffused gas detector is that it is less expensive than pumping. However, this method is not affected by the low pressure air source due to the influence of the detection environment, such as ambient temperature and wind speed.

The pumping mode is to suck the gas pump to be measured into the detecting probe, and the gettering pump is set with the gas built-in detector, and the detector is set at a dangerous place of the gas to be tested, thereby detecting the execution indication and the alarm function.

Features: Fast detection speed, long-distance measurement for dangerous areas, and maintenance personnel safety. It is suitable for occasions where the gas detector cannot be placed on site and has special requirements for reaction speed and pressure difference.

Second, according to the type of detection gas classification

Portable gas detectors can be classified into toxic gas detectors and flammable gas detectors according to the type of gas detected.

A combustible gas detector is a detector that responds to the concentration of single or multiple combustible gases. The smart sensor transmitter used in the detector is the most versatile flammable gas sensor transmitter. Among them, the infrared flammable gas detector is an ideal choice in the following application environments: frequent catalytic toxic gas exposure, high flammable gas emissions, anoxic environment, and detection of difficult environments.

The toxic gas detector consists of an electrochemical sensor, an intelligent transmitter module (ITM), and a sensor splash guard. The portable toxic gas detector can detect and analyze the concentration of toxic and harmful gases in the smoke emitted after purification, evaluate the purification effect, find problems, and improve in time to make the concentration of toxic and harmful gases discharged into the atmosphere reach the national standard.

Third, according to the type of gas detection

Portable gas detectors are classified according to the types of gases that can be detected, and can be classified into a single gas detector and an all-in-one gas detector.

Single gas detector, using high-performance catalytic combustion sensor, can be used in petrochemical, environmental accident, natural gas, liquefied petroleum gas, gas and other industries to detect various combustible gases, including: hydrocarbons, liquefied petroleum gas, natural gas, hydrogen, etc. . Its display unit is %LEL - the lowest explosion limit, and the resolution is 0.1% LEL. In addition, the single gas detector has the characteristics of small size, novel appearance and convenient carrying.

The all-in-one gas detector can be equipped with a single gas or multiple gas sensor detection instruments. It can be configured with single, two-in-one, three-in-one, four-in-one or optional four toxic gas sensors or any single gas sensor. Detection.

There are many types of portable gas detectors. We must look for two standards when purchasing:

First, security

Safety refers to the timely and accurate detection of gas leaks. The key point is the sensor.

Second, stability

Stability means that it can work normally under various working conditions. The key point is protection and explosion-proof capability.

Therefore, China coal group reminds consumers that when purchasing portable gas detectors, we must consider the above points, look for products from large manufacturers and big brands, and ensure that the instruments provide services safely and effectively.