The MEMS alcohol gas sensor uses the MEMS process to make a micro-hot plate on a Si-based substrate, and the gas-sensing material used is a metal oxide semiconductor material with low conductivity in clean air. When the sensor is in a gas environment, the conductivity of the sensor changes with the concentration of the detected gas in the air. The higher the concentration of this gas, the higher the conductivity of the sensor. The change in conductivity can be converted into an output signal corresponding to the gas concentration using a simple circuit.
The digital alcohol module is a low-power, miniaturized module. The module uses a combination of semiconductor gas sensors and high-performance microprocessors to detect gas concentrations in the environment. The module has high sensitivity, small size and precision, and adopts the I2C digital signal output method, which is convenient for users to use and debug, and greatly shortens the user's design and development cycle. The module can be widely used in environmental safety, portable instruments and many other fields.