1. The difference in the structure of the instrument
The structure of the gas detector is relatively simple, and only includes the probe (sensor) and the sensor signal conversion circuit part. The gas analyzer is not only equipped with probes (sensors) but also a complete set of gas circuit systems, that is, the sample gas is introduced into the instrument, and then a complete gas circuit system for venting or recovery of the instrument is led out.
2. Different detection methods
The gas detection alarm uses the probe to be directly exposed to the measured air or sample gas environment for detection. The gas analyzer is to introduce the measured gas (sample gas) into the instrument through a special method for measurement, and then lead it out of the instrument to vent.
3. Different control methods for measurement conditions
The gas detection and alarm instrument does not involve the adjustment and control of the technical conditions of the sample gas process, and at the same time, it does not consider the environmental conditions of the sample gas at all, and directly detects. A complete set of gas circuit systems and external supporting equipment inside the gas analyzer form a relatively complete chemical process flow. The gas analyzer internally adjusts and controls the working conditions of the sample gas in an all-round way to achieve the normal and stable operation of the sensor. Purpose, this is the guarantee that the gas analyzer can obtain accurate measurement data.
4. The operation methods to complete the whole process of the measurement are different
When the gas detection alarm instrument is applied, it is only necessary to place the instrument in the measured environment, and the instrument can display the value. The gas analyzer must carefully introduce the sample gas into the instrument, and then strictly adjust the technological conditions, such as temperature, pressure, flow, etc., in order to obtain accurate measurement data.
5. During the detection process, different ways of considering the elimination of interference factors
The gas detection and alarm instrument is measured by placing the sensor directly in the large ambient atmosphere. The design of the instrument structure and the actual use of the detection process do not consider the factors that interfere with the measurement in the large ambient atmosphere, and do not have the ability to eliminate various interference factors. Designing ability. In the design, selection and use of gas analyzers, various internal and external factors that affect the measurement must be fully considered, and they must be carefully eliminated one by one. Only in this way can the accuracy and authenticity of the test data be ensured. Otherwise, improperly ignoring a certain influencing factor is not permissible and unacceptable for detection.
6, the sensor life is different
The gas detector sensor is exposed to the environment, which is affected by many factors, and the sensor life is short. The gas analyzer sensor is placed inside the instrument with good quality, high precision and long life.
7. Different calibration methods
If the gas detector drifts after a period of use, it needs to be returned to the manufacturer for calibration and calibration. The process is cumbersome and the cost is high, which affects on-site use. The gas analyzer adopts the on-site calibration method, as long as there is calibration gas on site, it can be completed by itself. The method is simple, does not affect the on-site use, and the cost is low.
