MQ-series-dat
You can use arduino default "analogread" example to read the analog value from the sensor
- Arduino Breathalyzer
- Another Breathalyzer Design
all the sensors are 6-pin, sensor socket is 7-pin
sensor socket - STH1057-dat
Gas type and models
Selection Guide
| Model | Detect Type |
|---|---|
| MQ-2 | LPG, i-butane, propane, methane, alcohol, Hydrogen, smoke |
| MQ-3 | Alcohol |
| MQ-5 | High sensitivity to LPG, natural gas, town gas Small sensitivity to alcohol, smoke. Combustible gases: Butane, propane, methane, hydrogen |
- MQ-2 Smoke Gas Sensor
- MQ-3 Alcohol Sensor
- MQ-4 Methane Sensor
- MQ-5 Liquefied Gas, Natural Gas, City Gas Sensor
- MQ-6 Isobutane Propane Sensor
- MQ-7 Carbon Monoxide Sensor Module
- MQ-8 Hydrogen Sensor
- MQ-9 Carbon Monoxide and Combustible Gas Sensor
- MQ-135 Air Quality Detection Sensor
Note of use
Initiation check
- The sensor first warm-up for about 20 seconds.
- Put the sensor on a place without detecting gas,
- clockwise adjustment potentiometer until the light is on,
- then one-half turn counterclockwise until indicator does not light
- then close to the measured gas light is on, leave the measured gas, the light is off, this proof the sensor is working well