The difference between a gas analyser and a gas detector
1. Different structure of the instrument
Gas detector structure is relatively simple, including only the probe (sensor) and sensor signal conversion circuit part. The gas analyser is not only equipped with probes (sensors) and a complete set of gas circuit system, that is, the sample gas is introduced into the instrument, and then lead to the instrument emptying or recycling of a complete set of gas circuit system.
2. Different detection methods
The gas detection and alarm instrument uses the probe directly exposed to the measured air or sample gas environment for detection. While the gas analyser is the measured gas (sample gas) through a special way to introduce into the instrument internal measurement, and then lead out of the instrument outside the air.
3. Different control of measurement conditions
The gas detection and alarm instrument does not have the sample gas technical conditions of the adjustment and control part, at the same time, it also does not take into account the environmental conditions of the sample gas exists, direct detection.
Gas analyser internal supporting a complete set of gas system and external supporting equipment to form a more complete set of chemical process, gas analyser internal working conditions of the sample gas for all-round adjustment and control in order to achieve normal and stable operation of the sensor, which is the gas analyser can obtain accurate measurement data to ensure.
4. Different operation methods to complete the whole process of measurement
When the gas detection and alarm instrument is applied, it only needs to place the instrument in the measured atmosphere, and the instrument can display the value. The gas analyser must be carefully introduced into the sample gas inside the instrument, and then the strict adjustment of technical conditions, such as temperature, pressure, flow, etc., only when the operator will be adjusted until the instrument to achieve a stable chemical process, in order to obtain accurate measurement data. And the data obtained before this is incorrect and must be discarded.
5. In the detection process, the elimination of interference factors to consider different ways
Gas detection and alarm instrument is placed directly on the sensor in the atmosphere of the environment to determine the structural design of the instrument and in the actual use of the detection process does not take into account the atmosphere of the environment with or without factors interfering with the determination, and does not have the ability to exclude a variety of interfering factors in the design. While the gas analyser in the design and selection and the use of testing, we must fully consider the various internal and external factors affecting the measurement, and to seriously exclude one by one, only in this way can ensure the accuracy and authenticity of the test data. Otherwise, inappropriately ignored a certain influence on the detection of factors are not allowed and unacceptable.
6. The accuracy of the data is different
Gas detector can only provide qualitative analysis results and more rough quantitative analysis of data, the data displayed by this instrument can not stand up to scrutiny, can not be carried out error analysis (because only the analysis of data deviation from the true value of a very small in order to talk about the "error"), therefore, it can not be used as an accurate analysis of data to determine the (decision) important process improvements Adjustment measures. The gas analyser, on the other hand, is a strict measuring instrument, which can provide very accurate data when carrying out quantitative analyses. This data can be used as a basis for improvement and enhancement of gas production and safety, and can be used to guide and carry out production management, quality management and enterprise management. Even, this kind of data can be used as an important basis for judicial criminal investigation work, using it to fight lawsuits and determine the boundaries of right and wrong.
