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MQ-3 MQ3 Gas Sensor Module alcohol ethanol detection
KSh350.00
specification
- VCC 5V operating voltage
- GND to connect GND
- DO small board digital switch output interfaces (0 and 1)
- The AO small board analog output interface
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In stock
Description
MQ-3 Alcohol Sensor
Pin Description
For MQ-3 Sensor Module
| Pin Name | Description |
| VCC | This pin powers the module, typically the operating voltage is +5V |
| GND | Used to connect the module to system ground |
| Digital Out (DO) | You can also use this sensor to get digital output from this pin, by setting a threshold value using the potentiometer |
| Analog Out (AO) | This pin outputs 0-5V analog voltage based on the intensity of the gas |
For MQ-3 Sensor
| 1 | H -Pins | Out of the two H pins, one pin is connected to supply and the other to ground |
| 2 | A-Pins | The A pins and B pins are interchangeable. These pins will be tied to Supply voltage. |
| 3 | B-Pins | A pins and B pins are interchangeable. One pin will act as output while the other will be pulled to ground. |
Features of MQ-3 Alcohol Sensor
- Sensor Type – Semiconductor
- Easy SIP header interface
- Compatible with most of the microcontrollers
- Low-power standby mode
- Requires heater voltage
- Good sensitivity to alcohol gas
- Fast response and High sensitivity
- Long life and low cost
- Requires simple Drive circuit
Specifications of MQ-3 Gas Sensor
- Power requirements: 5 VDC @ ~165 mA (heater on) / ~60 mA (heater off)
- Current Consumption: 150mA
- DO output: TTL digital 0 and 1 ( 0.1 and 5V)
- AO output: 0.1- 0.3 V (relative to pollution), the maximum concentration of a voltage of about 4V
- Detecting Concentration: 0.05-10mg/L Alcohol
- Interface: 1 TTL compatible input (HSW), 1 TTL compatible output (ALR)
- Heater consumption: less than 750mW
- Operating temperature: 14 to 122 °F (-10 to 50°C)
- Load resistance: 200kΩ
- Sensitivity S: Rs(in air)/Rs(0.4mg/L Alcohol)≥5
- Sensing Resistance Rs: 2KΩ-20KΩ(in 0.4mg/l alcohol)
- Dimensions: 32 x 22 x 16 mm
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