How to pay attention to the life of gas sensor
All gas sensors have a certain period of use, known as life. The service life of Yiyang gas detector mainly depends on its main component - the sensor.
We also know that it is impossible to have a sensor that can detect all gases and meet all requirements. The sensors used in various gases and various environments are also different. They can be roughly divided into: sensors for detecting toxic gas concentrations (electrochemical Sensors (semiconductor sensors) and sensors for detecting explosive concentrations of combustible gases (catalytic combustion sensors or semiconductor sensors).
Most of the sensors used to measure the concentration of toxic gases are electrochemical sensors, which work based on the principle of electrochemistry. The main factor affecting its life is the electrolyte. The general sensor is about 2 years old, and the electrolyte is consumed and can no longer work normally. , so the life of the electrochemical sensor is about 2 years.
Most of the sensors used to detect the concentration of combustible gas are catalytic combustion sensors, and their service life is about 3 years.
Therefore, it is necessary to test the gas sensor at any time, use it within the validity period of the sensor as much as possible, and replace it in time once it fails.
Gas detectors have a limited service life, and portable gas detectors are no exception. Even if they are not used frequently, there will still be aging. In general, among the portable gas detectors, the photoionization detector has the longest lifespan, which is about four years; the LEL sensor has the second longest lifespan, which can be used for more than three years; the electrochemical specific gas sensor has a relatively short lifespan , generally in one to two years; the oxygen sensor can only be used for about one year.
The portable gas detector has its fixed detection range for all kinds of toxic and harmful gas detectors. Only when the measurement is completed within its measurement range can the instrument perform the measurement accurately.
And for a long time to measure beyond the measurement range, it may cause permanent damage to the sensor. For example, the LEL detector, if accidentally used in an environment exceeding 100% LEL, may completely burn the sensor.
And the toxic gas detector, working in a high concentration for a long time will also cause damage. Therefore, if the fixed instrument sends out an over-limit signal during use, the measurement circuit should be closed immediately to ensure the safety of the sensor.
