Background:

A gas analyzer is an instrument for flow analysis of the measured gas components. In many production processes, especially those involving chemical reactions, it is often not enough to automatically control the process based on physical parameters such as temperature, pressure and flow. Due to the variety of gas types and analysis principles to be analyzed, there are many types of gas analyzers. Commonly used gas analyzers include infrared gas analyzers, laser gas analyzers, ultraviolet gas analyzers, thermal conductivity gas analyzers, electrochemical gas analyzers, etc.

A gas detector or a gas leak detector is a gas leak concentration detection instrument, including a portable gas detector, a handheld gas detector, a fixed gas detector, and an online gas detector.

The following introduces the difference between a gas analyzer and a gas detector.

structure

The gas detector has a simple structure, consisting only of a probe (sensor) and a sensor signal conversion circuit. There are not only probes (sensors) inside the gas analyzer, but also a complete set of pneumatic system, which introduces the sample gas into the instrument, and then discharges the instrument or recycles it.

Detection method

The gas detector exposes the sensor directly to the measured gas or sample gas to complete the detection, while the gas analyzer first introduces the measured gas or sample gas into the instrument for detection through a special method, and then discharges the gas.

Detection condition control method

The gas detector does not involve the adjustment and control of the process conditions of the sample gas, and directly detects without considering the environmental conditions of the sample gas.

The gas analyzer is equipped with a complete set of internal air system and external supporting equipment to form a complete chemical process. The gas analyzer can comprehensively adjust and control the working conditions of the sample gas, so as to realize the normal and stable operation of the sensor. And this is also the guarantee that the gas analyzer can obtain accurate data.

How to complete the inspection process

When using a gas detector, the measured value can be obtained by placing the instrument in the measured environment.

The gas analyzer introduces the sample gas into the instrument, and then strictly adjusts the process conditions such as temperature, pressure, and flow to obtain accurate detection data.

Different Methods of Eliminating Interfering Factors in Testing Portable Gas Analyzers

The gas detector detects by directly exposing the sensor to the measured environment, and does not consider whether there is interference in the instrument structure design and practical application. Gas detectors are not designed to eliminate all kinds of interference factors.

However, the design, selection and use of gas analyzers should take into account the influence of various internal and external factors such as temperature and pressure on gas measurement, and carefully eliminate them one by one. Only in this way can accurate detection data be obtained. Otherwise, once a factor is improperly ignored, the test result will not be accepted or allowed.

data accuracy

Gas detectors can only provide qualitative analysis results and rough quantitative analysis data, and cannot perform error analysis (because "errors" will only occur if the analysis data deviates from the true value very little). Therefore, it cannot be used as an accurate analysis of the data to provide a basis for determining major technical improvements and adjustments.

A gas analyzer is a serious measuring instrument. In quantitative analysis, very accurate data can be provided as the basis for improving gas production and safety production, guiding and carrying out production management, quality management and enterprise management. What's more, this kind of data can be used as an important basis for judicial and criminal investigation work, and can be used to conduct litigation and determine the boundaries of right and wrong.