Many people have such a question when using gas detector: how long can it last? Many users think that the gas detector can be used until it is completely damaged. In fact, is this correct?
In fact, the service life of gas detector mainly depends on its main component sensor.
We 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, which can be roughly divided into: sensors used to detect the concentration of toxic gases and sensors used to detect the explosion concentration of combustible gases.
1. Most of the sensors used to measure the concentration of toxic gases are electrochemical sensors, which are based on the principle of electrochemistry. The electrolyte is the main factor affecting the service life of the sensors. After 2-3 years in the ideal environment, the electrolyte will be consumed and can no longer work normally, so the service life of the electrochemical sensors is 2-3 years.
2. Most of the sensors used to detect the concentration of combustible gas are catalytic combustion sensors, and their service life is 3-5 years in ideal environment. In addition, the sensor life of gas detector (including fixed gas alarm and portable gas alarm) has a great relationship with its exposed concentration.
For example, if the sensor of an ammonia detector is continuously exposed to 2ppm ammonia, its life is about one year (or 2ppm annual life). If it is exposed to 4ppm ammonia, its life is only six months. In this way, ammonia sensor is not suitable for chemical fertilizer plant, because the average concentration of ammonia is about 20-30ppm.
Therefore, the main factor affecting the life of the sensor is that the worse the environment is, the shorter the life of the sensor is, followed by the mechanism of the sensor. Sensors directly affect the use of gas detectors, so we should pay attention to the use and status of sensors, that is, we should pay attention to our own safety.
Editor in charge: GT