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Sensitive material of MQ303B gas sensor is semiconductor material which is with lower conductivity in clean air. When the target alcohol gas exists, the sensor’s conductivity gets higher along with...
Availability:
500 In Stock
Categories:
Alcohol sensor
Sensitive material of MQ303B gas sensor is semiconductor material which is with lower conductivity in clean air. When the target alcohol gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.
Application
It has high sensitivity to alcohol and quick response and resume, widely used in portable alcohol gas detector.
Features
High sensitivity, quick response and resume, long lifespan, low power consumption, low cost, small sizes.
Specifications
| Model | MQ303B | ||
| Sensor Type | Semiconductor | ||
| Standard Encapsulation | Metal | ||
| Target Gas | Alcohol gas | ||
| Detection range | 20~ 500ppm alcohol | ||
| Standard Circuit Conditions | Loop Voltage | V H | 0.9V±0.1V AC or DC |
| Heater Voltage | V c | ≤6V DC | |
| Load resistance | R L | Adjustable | |
| Heater Resistance | RH | 4.0Ω±0.5Ω（room temp.） | |
| Heater consumption | PH | ≤140mW | |
| Sensor character under standard test conditions | Zero point | V0 | 0.01~0.45V |
| Sensitivity | VS | 1.0~2.5V (in 125ppm C2H5OH) | |
| Concentration Slope | α | ≤0.6(R300ppm/R50ppm C2H5OH) | |
| Standard test conditions | Tem. Humidity | 20℃±2℃ 55%±5%RH | |
| Standard test circuit | Vc:3.0V±0.1V DC VH:0.9V±0.1V DC | ||
| Preheat time | Not less than 48 hours | ||
* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.
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