Electrochemical. Electrochemical gas detectors work by allowing gases to diffuse through a porous membrane to an electrode where it is either chemically oxidized or reduced. The amount of current produced is determined by how much of the gas is oxidized at the electrode, indicating the concentration of the gas.
Gas sensors are devices that can detect the presence and concentration of various hazardous gases and vapors, such as toxic or explosive gases, volatile organic compounds (VOCs), humidity, and odors [1].
Features
Maximum heater power dissipation: 88mW
Carbon monoxide CO 1 – 1000ppm
Ethanol C2H5OH 10 – 500ppm
Hydrogen H2 1 – 1000ppm
Ammonia NH3 1 – 500ppm
Methane CH4 >1000ppm
Smallest footprint for compact designs (5 x 7 x 1.55 mm)
Robust MEMS sensor for harsh environments
High-volume manufacturing for low-cost applications
Short lead-times
Specification
| Ambient operating temperature | -30 to 85 °C |
| Storage temperature range | -40 to 120 °C |
| Voltage supply | 4.9 – 5.1 |
| Heating voltage | Typically 2.4 V |
| Heating current | Typically 32 mA |
| Heating resistance | Typically 74 Ω at nominal power |
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