Components and Maintenance & Repair Determining the Service Life of Gas Detectors
Many people don't know how long they can use a gas detector after buying it, and some even think it can be used continuously. This approach is incorrect.
The service life of a gas detector mainly depends on its main component - the sensor.
We know that there is no single sensor that can detect all gases and meet all requirements. The sensors used for various gases and environments are also different, and can be roughly divided into sensors for detecting toxic gas concentrations and sensors for detecting explosive concentrations of flammable gases.
1. The sensors used to measure the concentration of toxic gases are mostly electrochemical sensors, which work based on the principle of electrochemistry. The main factor affecting their lifespan is the electrolyte. Generally, after 2-3 years in an ideal environment, the electrolyte is consumed and the sensor can no longer function normally. Therefore, the service life of electrochemical sensors is 2-3 years.
2. The sensors used to detect the concentration of combustible gases are mostly catalytic combustion sensors, which have a service life of 3-5 years in ideal environments. In addition, the lifespan of gas detectors (including fixed gas detectors and portable gas detectors) is closely related to the concentration they are exposed to. For example, if the sensor of an ammonia detector is continuously exposed to 2ppm ammonia, its lifespan is approximately one year (or 2ppm... year lifespan). If exposed to a 4ppm ammonia level, its lifespan is only six months. This makes ammonia gas sensors unsuitable for use in fertilizer plants, as the average concentration of ammonia is around 20-30 ppm. So the main factor affecting the lifespan of sensors is also that the worse the environmental environment they are in, the shorter their lifespan, followed by the mechanism of the sensor. Sensors directly affect the use of gas detectors, so paying attention to the use and status of sensors is also paying attention to our own safety.
