How to Effectively Extend the Service Life of Sensors in Composite Gas Detectors
The composite gas detector can be equipped with multiple gas detection sensors on one instrument, so it has the characteristics of small size, light weight, fast response, and simultaneous display of multiple gas concentrations. Compared with general gas detectors, it is also more convenient to use and can be effectively used for the detection of many gases such as methane, ethane, propane, butane, alcohol, formaldehyde, carbon monoxide, carbon dioxide, ethylene, acetylene, vinyl chloride, styrene, acrylic acid, etc.
For a composite gas detector, its lifespan mainly depends on its sensor. As we all know, 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. They can be roughly divided into sensors for detecting toxic gas concentrations and sensors for detecting explosive concentrations of flammable gases. 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, the electrolyte is consumed and the sensor can no longer function normally.
Therefore, the service life of electrochemical sensors is 2-3 years. The sensors used to detect the concentration of combustible gases are mostly catalytic combustion sensors, with a service life of 3-5 years.
In order to effectively improve the service life of the composite gas detector sensor, users should pay attention to its maintenance and upkeep during operation, including:
1. Check the gas flow rate, usually 30/h, as excessive or insufficient flow rate can have a significant impact on the analyzer results
2. Replace filter paper: Stop the air pump and drain the filter tank
3. Check for any air leaks in the pneumatic system. Whether the diaphragm of the sobbing pump is damaged, whether the sealing ring of the sampling probe is broken, whether the four-way valve and condensate are damaged, etc
4. Cleaning of sampling probe, unblocking of sampling hole pipeline
5. Check if the condenser is working properly, usually adjust the temperature within the range of 3 degrees Celsius
6. Check the measuring room for dirt and clean it promptly.
