What Distinctions Exist Between Gas Detection Instruments and Gas Analysis Instruments?
1. Different functions
Gas detector is an instrument tool for detecting gas leakage concentration and belongs to safety protection instruments. Gas analyzer is a process analysis instrument used to measure gas composition and detect gas composition. To detect the composition of smoke.
2. Different structures
The structure of the gas detector is relatively simple, consisting only of a gas probe (gas sensor) and a sensor signal conversion circuit. The gas analyzer is not only equipped with gas probes (gas sensors) inside, but also has a complete gas path system, which introduces the sample gas into the instrument, performs pre-treatment and component analysis, and then leads out the complete gas path system for instrument venting or recovery.
3. Different detection methods
Gas detectors use probes directly exposed to the air or sample gas environment being tested for detection. A gas analyzer is a device that introduces the measured gas (sample gas) into the instrument through special methods such as pump suction sampling, in-situ sampling, etc. for measurement, and then leads it out of the instrument for venting or recovery.
4. Different detection accuracies
Gas detectors can only provide qualitative analysis results and relatively rough quantitative analysis data. The data displayed by such instruments cannot withstand scrutiny and cannot be subjected to error analysis. Since 'error' can only be discussed when the analysis data deviates significantly from the true value, it cannot be used as an accurate analysis data to determine (determine) important process improvement and adjustment measures. But it can be used as a qualitative detection, such as a basis for issuing a signal alarm when a certain concentration is reached. A gas analyzer is a rigorous measuring instrument that can provide highly accurate data for quantitative analysis. This type of data can serve as a basis for industrial production, gas production, and safety and environmental improvement, guiding and conducting production management, quality management, and enterprise management. This type of data can serve as an important basis for production processes, judicial appraisal, product quality supervision, technological arbitration, environmental emission inspections, and even be used to determine the boundary between right and wrong in lawsuits.
5. Different control methods for measuring conditions
The gas detector does not have a design for adjusting and controlling the technical conditions of the sample gas process, and it does not consider the environmental conditions in which the sample gas exists and directly performs detection. The complete set of gas path system and external supporting equipment inside the gas analyzer constitute a relatively complete process flow of physical and chemical methods. The working conditions of the sample gas are comprehensively adjusted and controlled inside the gas analyzer to achieve the normal and stable operation of the sensor. This is the guarantee that the gas analyzer can obtain accurate measurement data.
6. The operation methods for completing the entire measurement process are different
When using a gas detector, simply place the instrument in the measured atmosphere and the instrument will display the value. The gas analyzer must carefully introduce the sample gas into the interior of the instrument, and then strictly adjust the process technical conditions, such as temperature, pressure, flow rate, etc. Only when the operator adjusts the instrument until a stable analytical chemical process is achieved, can accurate measurement data be obtained.
7. Different ways to consider excluding interfering factors
The gas detector directly places the sensor in the ambient atmosphere for measurement. The instrument structure design and actual use of the detection process do not consider the presence or absence of interference factors in the ambient atmosphere, and do not have the design ability to eliminate various interference factors. When designing, selecting, and using gas analyzers for testing, various internal and external factors that affect the measurement must be fully considered, and they must be carefully eliminated one by one to ensure the accuracy and authenticity of the testing data. Otherwise, neglecting a certain influencing factor inappropriately is not allowed and unacceptable for detection.
8. Different costs
Generally speaking, the investment cost of gas detectors is relatively low, while the cost of gas analyzers is slightly higher compared to gas detectors.
