









MEMS Alcohol Sensor GM-302B
Summary:
MEMS alcohol gas sensor is using MEMS micro-fabrication hot plate on a Si substrate base, gas-sensitive materials used in the clean air with low conductivity metal oxide semiconductor material. When the sensor exposed to gas atmosphere, the conductivity is changing as the detected gas concentration in the air. The higher the concentration of the gas, the higher the conductivity. Use simple circuit can convert the change of conductivity of the gas concentration corresponding to the output signal.
Feature:
* MEMS technology, Strong construction
* Good shock resistance
* Small sizes and low power consumption
* Fast response and resume
* Simple drive circuit, Long lifespan
APPLICATION
The picture shows a common "ignition interlock system" with an alcohol detection function in the United States. This lock is connected to the ignition system of the car. Before ignition, the driver must blow air to ensure that the alcohol concentration in the body does not exceed the standard. and the car can start.
Strengthen the punishment of drinking and driving in all the country to reduce the vicious traffic accidents caused by drunk driving. This involves testing a person's alcohol level and using equipment to do the testing. An alcohol detector is an effective tool for measuring the alcohol content in the human body.
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PARAMETER
Technical Data Sheet
Part No. | GM-302B | ||
Sensor Type | MEMS | ||
Standard Encapsulation | Ceramic | ||
Detection Gas | Ethanol vapor | ||
Detection Range | 1~500ppm | ||
Standard Circuit Conditions | Loop Voltage | VC | ≤24V DC |
Heater Voltage | VH | 2.5V±0.1V AC or DC | |
Load Resistance | RL | Adjustable | |
Sensor character under standard test conditions | Heater Resistance | RH | 80Ω±20Ω(room temperature) |
Heater consumption | PH | ≤50mW | |
sensitive materials resistance | RS | 1KΩ~30KΩ(in 50ppm Ethanol) | |
Sensitivity | S | R0(in air)/RS(in 5000ppm Ethanol)≥3.0 | |
Concentration Slope | α | ≤0.9(R100ppm/R30ppm Ethanol) | |
Standard test conditions | Temp. Humidity | 20℃±2℃;55%±5%RH | |
Standard test circuit | VH:2.5V±0.1V;VC :5.0V±0.1V |

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RELATED PRODUCTS
As a pioneer in gas sensor based solutions with the advanced processes, technologies and products, Winsen offers a wide range of gas sensors:
RELATED PRODUCTS
As a pioneer in gas sensor based solutions with the advanced processes, technologies and products, Winsen offers a wide range of gas sensors:
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We have 17 sensor series, 200+ categories, and 300+ detection objects for gas detection. Such as CO, CO2, VOC, PM2.5, CH4, LPG and so on. In particular, we also have MEMS sensors. According to your industry application, gas principle, power consumption, accuracy, and range requirements, and we can select a specific model for you. You can also use the product filter below to choose a suitable product, or choose online serivce.
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