Issues you need to pay attention to when using gas detection instruments
1) Pay attention to regular calibration and testing.
Toxic and harmful gas detection instruments, like other analytical and detection instruments, are measured using a relative comparison method: first, the instrument is calibrated with a zero gas and a standard concentration gas, and the standard curve is obtained and stored in the instrument. During measurement, the instrument compares the electrical signal generated by the gas concentration to be measured with the electrical signal of the standard concentration to calculate the accurate gas concentration value. Therefore, zeroing the instrument at any time and calibrating the instrument frequently are essential tasks to ensure accurate measurement. It should be noted that many current gas detectors can replace the detection sensors, but this does not mean that a detector can be equipped with different detector probes at any time. Whenever a probe is replaced, in addition to the required sensor activation time, the instrument must be recalibrated. In addition, it is recommended that before using various instruments, the response test of the standard gas used for the instruments is carried out to ensure that the instruments truly play a protective role. Humidity sensor probe, , Stainless steel electric heating tube PT100 sensor, , Cast aluminum heater, Heating ring Fluid solenoid valve
2) Pay attention to detection interference between various sensors.
Generally speaking, each sensor corresponds to a specific detection gas, but any kind of gas detector cannot be special. Therefore, when selecting a gas sensor, you should try your best to understand the detection interference of other gases on the sensor to ensure its accurate detection of specific gases.
3) Pay attention to the lifespan of various sensors:
All types of gas sensors have a certain service life, that is, life. Generally speaking, among portable instruments, LEL sensors have a longer life and can generally be used for about three years; photoionization detectors have a life of four years or longer; electrochemical specific gas sensors have a relatively short life and generally can be used for about three years. In one to two years; the oxygen sensor has the shortest life, about one year. The life of the electrochemical sensor depends on the drying up of the electrolyte in it, so if it is not used for a long time, sealing it in a lower temperature environment can extend its service life to a certain extent. Due to the relatively large size of fixed instruments, the life of the sensor is also longer. Therefore, the sensor should be tested at any time and used within the validity period of the sensor as much as possible. Once it fails, replace it in time.
4) Pay attention to the concentration measurement range of the detection instrument:
Various types of toxic and harmful gas detectors have their own fixed detection ranges. Only by completing measurements within its measurement range can the instrument ensure accurate measurement. Measuring beyond the measurement range for a long time may cause permanent damage to the sensor.
For example, if an LEL detector is accidentally used in an environment exceeding 100% LEL, the sensor may be completely burned out. Toxic gas detectors can also be damaged if they are used at higher concentrations for a long time. Therefore, if a fixed instrument sends out an over-limit signal during use, the measurement circuit must be shut down immediately to ensure the safety of the sensor.
In short, toxic and harmful gas detectors are a powerful tool to ensure industrial safety and worker health. We need to choose the appropriate gas detector based on the specific use environment and required functions.
