Products
Alcohol Sensor
Application:
For alcohol supervision and inspection equipmentProduct characteristics:
Low costDescription
The gas-sensitive material used in the MQ-K3B gas sensor is tin dioxide (SnO2) with low conductivity in clean air. When alcohol vapor exists in the sensor's environment, the conductivity of the sensor increases with the increase of the alcohol vapor concentration in the air. A simple circuit can be used to convert the change in conductivity into an output signal corresponding to the gas concentration.
The MQ-K3B gas sensor is highly sensitive to alcohol and can resist interference from gasoline, smoke, and water vapor. This sensor can detect various concentrations of alcohol atmosphere and is a low-cost sensor suitable for a variety of applications.
Specifications
| Product model | MQ-K3B | ||
| Product type | Semiconductor gas sensor | ||
| Standard packaging | Plastic packaging | ||
| Detect gas | Alcohol vapor | ||
| Detect concentration | 25-500ppm Alcohol | ||
| Standard circuit conditions | Heat voltage (DC) | V H | 5.0V±0.1V AC or DC |
| Circuit voltage(Dc) | Vc | ≤24V DC | |
| Load resistance | R L | adjustable | |
| Characteristics of gas sensing components under standard testing conditions | Heating resistor | RH | 29Ω±3Ω(indoor temperature) |
| Heating power | PH | ≤900mW | |
| Sensitivity | S | R0 (in air)/Rs(125ppm alcohol)≥5 | |
| Output voltage | Vs | 2.5V～4.0V (in 125ppm alcohol) | |
| Concentration slope | α | ≤0.6(R300ppm/R50ppm alcohol) | |
| Standard testing conditions | Temperature/humidity | 20℃土2℃; 55%士5%RH | |
| Standard Test Circuit | VC: 5V±0.1V; VH: 5V±0.1V | ||
| Warm-up time | no less than 48 hours | ||
| Oxygen concentration | 21% (not less than 18%) (Oxygen concentration will affect the initial value, sensitivity, and repeatability of the sensor. Please consult for use when using at low oxygen concentrations) | ||
| Product Life | 10 years | ||
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