1, pay attention to regular calibration and testing.

Toxic and harmful gas detectors, like other analytical detectors, are also measured in a relatively comparative manner. First, the device is calibrated with zero gas and standard concentration gas, the standard curve is stored in the instrument for measurement, and the electrical signal generated by the gas concentration in the measurement is compared with the electrical signal of the standard concentration to calculate the accurate gas concentration value. Therefore, it is necessary to calibrate the instrument at any time, and it is necessary to calibrate the instrument regularly to ensure the accurate measurement of the instrument.

At present, many gas detectors can replace the detection sensor, but this does not mean that other detectors can be used at any time. When the probe is replaced at any time, not only a specific sensor activation time is required, but also a recalibration of the device is required. In addition, before using various instruments, it is best to test the response of the instrument to ensure that the instrument actually plays a protective role.

2, pay attention to the detection interference between various sensors.

Generally speaking, each sensor corresponds to a specific sensing gas, but the random gas detector must not be a special effect. Therefore, when selecting a gas sensor, it is necessary to understand as much as possible the detection interference of other gases on the sensor in order to correctly detect a specific gas.

3. Pay attention to the service life of various sensors.

All kinds of gas sensors have a certain life, that is, life. Generally speaking, the LEL sensor on the portable device has a long life, generally about 3 years; the life of the photoionization detector is more than 4 years. Electrochemical specific gas sensors have a short life span, generally 1-2 years; oxygen sensors have the shortest life span, about one year. The life of the electrochemical sensor depends on the drying of the electrolyte. If it is not used for a long time, the low temperature can also be sealed in the environment to extend a certain life. The fixed instrument has a larger volume and a longer sensor life.Therefore, detect the sensor at any time and use it within the validity period of the sensor as much as possible. If it fails, please replace it in time.

4. Pay attention to the measurement range of the concentration of the test equipment

All kinds of toxic and harmful gas detectors have a certain detection range. The measurement must be completed within the measurement range for the measurement to be accurate. If the measurement exceeds the measurement range, the sensor may be permanently damaged.