Description:
This MQ-3 Gas Sensor is suitable for detecting alcohol concentration in your breath, just like your common breathalyzer. The MQ-3 Gas Sensor provides an analogue resistive output based on alcohol concentration. When the MQ-3 Gas Sensor is present in the environment in which the alcohol vapour, the sensor's conductivity increases with the concentration of alcohol gas in the air increases. Using a simple circuit can be converted to the change in conductivity of the gas concentration with the corresponding output signal.
Specifications:
- Input voltage: DC5V
- Power consumption (current) : 150 mA
- DO output: TTL digital 1 and 0 (0.1 and 5 V)
- AO output: 0.1-0.3 V (pollution-free)
- The highest concentration of voltage: Approx 4 V
- Detection range of alcohol: detection range of 10 ~ 1000 PPM
Features:
- High-quality double panel design, with power indicator and TTL output signal
- Have DO switch signal(TTL) output and AO analogue signal output
- TTL output signal for low level effectively. (when the low output electric signal lights at ordinary times, can be directly connected to a single-chip microcomputer or relay module)
- Analogue output voltage with concentration, the higher the concentration, the higher voltage
- MQ-3 Gas Sensor has better sensitivity to liquefied petroleum gas, natural gas, city gas, smoke
- MQ-3 Gas Sensor has long service life and reliable stability
- Rapid response recovery features
Pin Description:
- VCC: Positive (5 v)
- GND: Connect power negative
- DO: TTL switch signal output
- AO: Analog signal output
Package Included:
1 x MQ-3 Gas Sensor MQ-3 Alcohol Detector Gas Sensor Module