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Common Gas Alarm Sensor Types

Published on: 2024-07-26      Views: 185

Semiconductor Sensors:

Principle: Semiconductor sensors detect gases based on changes in conductivity when gas molecules interact with a heated metal oxide surface.
Advantages: They are cost-effective, responsive, and suitable for detecting a wide range of gases.
Considerations: They may require periodic calibration to maintain accuracy.

Catalytic Bead Sensors:
Principle: Catalytic bead sensors work by oxidizing gases on a heated bead, causing a change in resistance that correlates with gas concentration.
Advantages: They are robust, highly sensitive, and respond quickly to gas leaks.
Considerations: They can be affected by humidity and certain chemicals, requiring careful calibration and maintenance.

Infrared (IR) Sensors:
Principle: Infrared sensors detect gases by measuring the absorption of infrared light at specific wavelengths characteristic of the target gas.

Advantages: They offer high selectivity and are less affected by humidity or other gases.


Considerations: They tend to be more expensive and require careful calibration.
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