| Detailed Description | The alcohol gas sensor uses tin dioxide (SnO2), a gas-sensitive material with low conductivity in clean air. When alcohol vapor is present in the sensor's environment, the sensor's conductivity increases with increasing alcohol concentration. A simple circuit converts this conductivity change into an output signal corresponding to the gas concentration. The MQ-3B semiconductor alcohol sensor is highly sensitive to alcohol and resistant to interference from gasoline, smoke, and water vapor. This gas sensor can detect various alcohol concentrations and is a low-cost sensor suitable for a wide range of applications. |
| Main Applications | Widely applicable to vehicle alcohol gas detectors, industrial alcohol gas detectors, and portable gas detectors. |
| Product Type | Semiconductor gas-sensitive element |
| Standard Package | Plastic sealing |
| Detecting Gas | Alcohol vapor |
| Detection Concentration | 25-500 ppm alcohol |
| Circuit Voltage | ≤24V DC |
| Heating Voltage | 5.0V±0.1V AC or DC |
| Load Resistor | Adjustable |
| Heating Resistor | 29±3Ω (room temperature) |
| Heating Power Consumption | ≤900mW |
| Sensitivity | Ro (in air) / Rs (125ppm alcohol) ≥ 5 |
| Output Voltage | 2.5V-4.0V (in 125ppm alcohol) |
| Concentration Slope | ≤0.6 (R300ppm/R50ppm alcohol) |
| Standard Test Temperature and Humidity | 20℃±2℃;55%±5%RH |
| Standard Test Circuit | Vc:5.0V±0.1V; VH:5.0V±0.1V |
| Standard Test Preheating Time | No less than 48 hours |
| Oxygen Content | 21% (not less than 18%, (Oxygen concentration will affect the sensor's initial value, sensitivity and repeatability. Please consult when using it in low oxygen concentration conditions ) |
| Life | 10 years |
| Features | High sensitivity to alcohol It can resist interference from gasoline, smoke, and water vapor. Long lifespan, low cost, and simple drive circuit |
| Note | Output voltage (Vs) refers to the voltage in the test atmosphere. |
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Eata Sensors is your strategic partner in precision sensing technology. We offer a full range of advanced sensor products, core components, and customized engineering services. We collaborate with global clients to jointly solve complex measurement challenges.
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