This model is a fuel cell type alcohol chemical sensor. Alcohol and oxygen undergo corresponding redox reactions on the working electrode and the counter electrode and release charges to form a current. The generated current is proportional to the alcohol concentration and follows Faraday's law. The level of alcohol concentration can be determined by testing the magnitude of the current.
ME2-C2H5OH-Ф16 sensor is a galvanic electrochemical sensor. The corresponding redox reaction of C2H5OH and O2 occurs on the working electrode and the counter electrode, and the charge is released to form a current. The generated current is proportional to the concentration of C2H5OH and follows Faraday's law. The concentration of C2H5OH can be determined by testing the magnitude of the current.
The gas sensing material used in the MQ-3B alcohol gas sensor is tin dioxide (SnO2), which has a low conductivity in clean air. When there is alcohol vapor in the environment where the alcohol sensor is located, the conductivity of the gas sensor increases with the increase of the alcohol gas concentration in the air. The change in conductivity can be converted into an output signal corresponding to the gas concentration using a simple circuit.
MQ-3B semiconductor alcohol sensor has high sensitivity to alcohol and can resist the interference of gasoline, smoke and water vapor. This gas sensor can detect alcohol atmospheres of various concentrations and is a low-cost sensor suitable for a variety of applications.
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.