Various toxic gas detectors have their own strong detection range. As long as the measurement is achieved within its scope of measurement, the instrument can be guaranteed to perform the measurement correctly. The long-term measurement beyond the scope of measurement may cause permanent damage to the sensor.
        Toxic gas alarms are also measured in the same way as other analysis and testing instruments. The instrument is first calibrated with a zero gas and a standard concentration of gas, and the calibration curve is stored in the instrument. When measuring, the instrument compares the electric signal of the gas concentration to be measured with the electric signal of the same concentration to calculate the correct gas concentration value. At any time, in addition to the necessary sensor activation time when changing the probe, the instrument must be recalibrated. Therefore, calibration of the instrument is performed at any time. Regular calibration of the instrument is an indispensable thing to ensure the correct measurement of the instrument. It must be clarified that many gas detectors are capable of changing the detection sensors. However, this does not mean that a detector can be equipped with different detector probes at any time. In addition, before the various instruments were used, the instrument was used to carry out corresponding tests on the standard gas to ensure that the instrument really played the role of shelter.
        In general, each sensor corresponds to a specific detection gas, but any type of gas detector may not be effective. Therefore, when choosing a gas sensor, it is reasonable to try to understand the nuisance caused by other gases to the sensor, so as to ensure proper detection of the specific gas.
        A variety of gas sensors have a certain useful life, that is, life. In general, in portable instruments, LEL sensors have a long life, typically about three years; photoionization detectors have a lifespan of four years or more; electrochemical specific gas sensors have a relatively short lifespan, generally In one to two years, the oxygen sensor has a short life span of about one year. The life of the electrochemical sensor depends on the dryness of the electrolyte , so if it is not used for a long time, sealing it in a high temperature environment can delay a certain useful life. Because of the relatively large size of a solid instrument, the life of the sensor is longer. Therefore, it is necessary to detect the sensor at any time and try to use it within the useful life of the sensor. If it fails, it will be exchanged in real time.
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