MQ3 Gas Sensor – Alcohol, Ethanol, Smoke
Highlights:
1. Power requirements: 5 VDC @ ~165 mA (heater on) / ~60 mA (heater off).
2. Current Consumption: 150mA.
3. DO output: 0.1 and 5V.
4. AO output: 0.1- 0.3 V (relative to pollution), the maximum concentration of a voltage of about 4V
5. Detecting Concentration: 0.05-10mg/L Alcohol.
MQ4 Gas Sensor – Methane, CNG Gas
Highlights:
1. Detecting range: 300~10000ppm
2. Signal output indicator.
3. Dual Signal output (analog output and TTL output).
4. The TTL output signal is low level, allows us to connect with SCM directly.
5. Analog output 0~5V voltage.
6. Quick response and recovery.
MQ5 Gas Sensor – Natural gas, LPG
Highlights:
1. Model: MQ-5
2. Operating Voltage: 5V DC
3. Operating Temparature:-20~40 degree celcius