When many people use gas detectors, they have such a question: how long does it last? Many users think that the gas detector can be used until it is completely damaged and cannot be used. In fact, is this approach correct?
In fact, the service life of the gas detector mainly depends on its main component - the sensor.
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 and sensors for detecting combustible gases. Explosive concentration sensor.
1. Most of the sensors used to measure the concentration of toxic gases are electrochemical sensors. They are sensors based on electrochemical principles. The main factor that affects their life is the electrolyte. The general sensor is in an ideal environment after 2-3 years. It is consumed and can no longer work normally, so the service life of the electrochemical sensor 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 an ideal environment. In addition, the life of the gas detector (including fixed gas alarms and portable gas alarms) has a great relationship with the concentration it is exposed to.
For example, the sensor of an ammonia detector will have a lifespan of approximately one year (or 2ppm annual life) if continuously exposed to 2ppm ammonia. If exposed to 4ppm ammonia levels, it will only have a six-month lifespan. life. In this way, the ammonia gas sensor is not suitable for use in fertilizer plants, because the average concentration of ammonia at this time is about 20-30ppm.
Therefore, the main factor that affects the life of the sensor is that the worse the environmental environment it is in, the shorter the life is, and the second is the mechanism of the sensor. Sensors directly affect the use of gas detectors, so paying attention to the use and status of sensors means paying attention to our own safety.
