The service life of portable gas detector

Does everyone know that the service life of an instrument is based solely on the operator's technology? This is not the case. The portable gas detector will be determined based on a variety of factors. What determines the useful life of the portable gas detector?

1. The use of portable gas alarm process should pay attention to the regular calibration and detection of many current gas detectors can replace the detection sensor, but this does not mean that a detector can be equipped with different detector probes at any time . Whenever a probe is replaced, the instrument must be recalibrated in addition to a certain sensor activation time. In addition, it is recommended to respond to the standard gas of the instrument before using it to ensure that the instrument really protects the instrument. Combustible gas alarms and toxic gas alarms, like other analytical detection instruments, are measured using a comparative method: the instrument is first calibrated with a zero gas and a standard concentration of gas, and the calibration curve is stored in In the instrument, when measuring, the instrument compares the electrical signal generated by the concentration of the gas to be measured with the electrical signal of the standard concentration to calculate the accurate gas concentration value. Therefore, zero calibration of the instrument at any time, and regular calibration of the instrument is an indispensable task to ensure accurate measurement of the instrument.

2. Pay attention to the detection interference between various sensors Although the composite gas detector can detect many other things simultaneously, the portable gas detector is not an arbitrary combination of toxic and harmful gases. In general, each gas sensor corresponds to a specific detection gas, but any gas detector may not be absolutely effective. Therefore, when selecting a gas sensor, it is necessary to know as much as possible the interference of other gases to the sensor, so as to ensure accurate detection of the specific gas.

3. Pay attention to the life of each type of portable gas alarm sensor. All kinds of gas sensors have a certain service life, ie, life. Generally speaking, in portable instruments, LEL sensors have a long life, generally about three years; photoionization detectors have a life expectancy of four years or more; electrochemical specific gas sensors have a relatively short life span, and generally In one year to two years, the oxygen sensor has the shortest 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 lower temperature environment can prolong the service life. Because of the relatively large size of the stationary instrument, the life of the sensor is longer. Therefore, it is necessary to detect the sensor at any time and use it within the effective period of the sensor as soon as possible. If it fails, replace it in time.

4. Pay attention to the concentration measurement range of gas detection instruments Portable gas detectors have fixed detection ranges for various types of toxic and harmful gas detectors. Only when the measurement is completed within its measurement range can the instrument be accurately measured. However, measuring over a long period of time may cause permanent damage to the sensor. For example, if the LEL detector is inadvertently used in a 100% LEL environment, it may burn the sensor completely. Toxic gas detectors can also cause damage if used for a long time at higher concentrations. Therefore, if a fixed-type instrument emits an over-limit signal during use, the measurement circuit must be turned off immediately to ensure the safety of the sensor.

The above four points can determine the service life of the portable gas detector. Therefore, the portable gas detector must pay more attention during use, so that it can increase its service life and also improve the accuracy of the measurement!