Pay attention to the concentration measuring range of the detector:
All types of toxic and harmful gas detectors have fixed detection ranges. Accurate measurement can only be guaranteed when working within the specified range. Long-term over-range detection may cause permanent damage to sensors.
For instance, LEL detectors may suffer complete sensor burnout if used in environments exceeding 100% LEL. Similarly, toxic gas detectors will be damaged under prolonged exposure to high gas concentrations. Therefore, once fixed detectors send out over-limit alarms, cut off the measuring circuit immediately to protect the sensors.
In short, toxic and harmful gas detectors serve as essential equipment to ensure industrial safety and staff health. Users shall select suitable detectors according to actual working conditions and functional demands. Available types include fixed and portable, diffusion and pump-suction, single-gas and multi-gas, inorganic and organic gas detectors with various combinations. Proper selection helps improve working efficiency and prevent potential risks in advance.
All gas sensors have a definite service life. In general portable devices, LEL sensors last about three years; photoionization detectors have a service life of four years or longer; electrochemical specific gas sensors have a relatively shorter lifespan of one to two years; oxygen sensors have the shortest service life of roughly one year.
The service life of electrochemical sensors depends on the evaporation of internal electrolyte. Sealing and storing them in a low-temperature environment when idle can effectively extend their service life. Fixed detectors feature larger sizes and accordingly longer sensor service life. Regular inspection is required to ensure use within valid period, and timely replacement shall be carried out once sensors fail.
