Technical comparison of electrochemical and catalytic combustion gas sensors
The comparison between electrochemical technology and catalytic combustion technology is as follows:
Anr Combustible gas detector
The different components contained in different electrochemical gas sensors determine that it can react with the corresponding poison gas; the measuring head can measure the current generated by the reaction and convert it into a gas concentration value (PPM or PPB). The catalytic sensor "flamelessly burns" the flammable gas on the ball coated with the catalyst; the measuring head can measure the change in resistance and through A/D conversion, display the corresponding reading of the change. Generally, the lower explosion limit is taken as the full range.
AG310 Toxic gas detector
Due to the relatively low cost of electrochemical and catalytic combustion type measuring heads, they are often used for measurement at the "source point" (ie where leakage is likely to occur). Therefore, the response to the leak is rapid and can be continuously detected. In addition, because there are no moving parts, it will not cause mechanical failure.
However, these two types of sensors also have shortcomings: some gas sensors not only react to the corresponding gas (that is, the gas they should react according to the design), but also react to other gases (interfering gases), so it is necessary to pay attention to Avoid using these sensors in areas where there may be interfering gases during design and installation. The sensor needs to be calibrated regularly, usually once every three months (depending on the influence of factors such as different brands, working environment, working state, etc.); the sensor usually needs to be replaced after 1 to 3 years of use (depending on factors such as different brands, working environment, working state, etc.) Impact). In addition, some brands of sensors use electrolytic solutions, which require regular electrolyte filling.