MQ6 SENSOR
- Power requirements: VCC - 5V±0.1
- 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
- Detection Gas: LPG, iso-butane, propane, and LNG
- Detection Concentration: 200-10000ppm
- Heating voltage: 5V±0.1
-  Load resistance: 20KΩ
-  Heater resistance: 33±10%
- Â Heating consumption: less than 750mw
- Operating temperature:-10℃-50℃
- Related humidity less than 95%Rh
- Sensing Resistance: 10KΩ- 60KΩ (1000ppm LPG)
- Preheat time: Over 24 hour
- High sensitivity to LPG, iso-butane, propane
- Small sensitivity to alcohol, smoke.
- Fast response
- Simple drive circuit
MQ5 Module
- Operating voltage: 5V
- Interface Type: Analog & Digital
- Dual signal output (analogue output, and TTL level output)
- Detecting concentration：200-10000ppm
- The TTL output signal is low. (When low output signal light, and can be connected directly to the microcontroller
- High Sensitivity to LPG, Natural Gas, Town Gas
- small sensitivity to smoke & alcohol
- Low Cost.
- Stable & Long Life.
- Simple drive circuit.
- Fast response.Â
- Onboard Power indication.
- Adjustable sensitivity
- Dimension: 32mm x 22m x 27mm
MQ5 SENSOR
- Power requirements: VCC - 5V±0.1
- 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
- Detection Gas: LPG, natural gas, town gas
- Detection Concentration: 300-10000ppm
- Heating voltage: 5V±0.1
-  Load resistance: 20KΩ
-  Heater resistance: 31±10%
- Â Heating consumption: less than 800mw
- Operating temperature:-10 to 50°C
- Related humidity less than 95%Rh
- Sensing Resistance: 10KΩ- 60KΩ (1000ppm CH4)
- Preheat time: Over 24 hour
MQ4 Sensor
- Power requirements: VCC - 5V±0.1
- 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
- Detection Gas: Natural gas/Methane
- Detection Concentration: 200-10000ppm (Natural gas / Methane)
- 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)
- Â Related humidity less than 95%Rh
- Load resistance: 20KΩ
- Sensing Resistance: 10KΩ- 60KΩ (1000ppm CH4)
- Preheat time: Over 24 hour
- Standard Encapsulation Bakelite, Metal cap
MQ4 Module
- Interface Type: Analog & Digital
- Working voltage: DC 5V
- DOUT: TTL output
- AOUT: Analog output
- Detection Gas: Natural gas/Methane
- Detection range: 300 to 10000ppm
- Digital Out is High or Low based on an adjustable preset threshold,
- Stable & Long Life.
- Onboard Power indication
- Standard Encapsulation Bakelite, Metal cap
- Good sensitivity to Combustible gas in a wide range
- High sensitivity to CH4, Natural gas.
- Small sensitivity to alcohol, smoke.
- Fast response and recovery
- Adjustable sensitivity
- Dimension: 32mm x 22m x 27mm
MQ3 Sensor
- Operating Voltage: 5V ±0.1
- Detecting Concentration: 0.05-10mg/L Alcohol
- Current Consumption : 150mA
- Operation Temperature : -10°C ~ 70°C
- Heater consumption: less than 900mW
- Load resistance: Adjustable
- Heating resistance: 33Ω ± 5%
- 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
- Requires simple Drive circuit
- Dimensions: 32 x 22 x 16 mm
MQ3 Module
- Interface Type: Analog & Digital
- Working voltage: DC 5V
- Working Current: 150mA
- DOUT: TTL output
- AOUT: Analog output
- Preheat time: Over 20s
- Detection Range: 0.05 mg/L to 10 mg/L
- Sensitive to Alcohol, Benzine, CH4, Hexane, LPG, CO
- High Sensitivity to Alcohol & small sensitivity to Benzine.
- Digital Out is High or Low based on an adjustable preset threshold,
- Stable & Long Life.
- Onboard Power indication
- The TTL output signal is a low level
- Analog 0 ~ 5 v voltage output, the higher the concentration, the higher the voltage
- Fast response and recovery
- Adjustable sensitivity
- Dimension: 32mm x 22m x 27mm
MQ2 module
- Interface Type: Analog & Digital
- Working voltage: DC 5V
- Working Current: 150mA
- DOUT: TTL output
- AOUT: Analog output
- Preheat time: Over 20s
- Detection Range: 300 -10000 ppm
- Sensitive to H2, LPG, CH4, CO, Alcohol, Smoke or Propane,
- Digital Out is High or Low based on an adjustable preset threshold,
- High Sensitivity to Smoke & combustible gasses like Hydrogen, LPG & Propane.
- Stable & Long Life.
- Onboard Power indication
- The TTL output signal is a low level
- Analog 0 ~ 5 v voltage output, the higher the concentration, the higher the voltage
- Fast response and recovery
- Adjustable sensitivity
- Dimension: 32mm x 22m x 27mm
MQ2 Sensor
- Operating Voltage: +5V
- Can be used to Measure or detect LPG, Alcohol, Propane, Hydrogen, CO, and even methane
- Analogue output voltage: 0V to 5V
- Digital Output Voltage: 0V or 5V (TTL Logic)
- Preheat duration 20 seconds
- Can be used as a digital or analogue sensor
- Load resistance: 20 KΩ
- Heater resistance: 33Ω ± 5%
- Heating consumption: <800mw
- Sensing Resistance: 10 KΩ – 60 KΩ
- Detection range: 200 – 10000ppm
- Preheat Time: Over 24 hour
- High sensitivity to LPG, Propane, and Hydrogen
- The Sensitivity of a Digital pin can be varied using the potentiometer
MQ135 Module
- Working voltage: DC 5V
- Working Current: 150mA
- DOUT: TTL output
- AOUT: Analog output
- Preheat time: Over 20s
- Detection Range: 10 - 300 ppm NH3, 10 - 1000 ppm Benzene, 10 - 300 Alcohol
- Sensitivity to Ammonia, Sulphide, and Benzene steam
- With signal output instructions
- The TTL output signal is a low level
- Analog 0 ~ 5 v voltage output, the higher the concentration, the higher the voltage
- Sensitive for benzene, alcohol, smoke
- Fast response and recovery
- Adjustable sensitivity
- Signal output indicator
- Dimension: 32mm x 22m x 27mm
MQ135 SENSOR
- Operating Voltage: 3.3 – 5V.
- Detect/Measure NH3, NOx, alcohol, Benzene, smoke, CO2, etc.
- Analog output voltage: 0V to 5V
- Digital output voltage: 0V or 5V (TTL Logic)
- Detection range:10 ppm-300 ppm NH3, 10 ppm-1000 ppm Benzene, 10 ppm-300 ppm Alcohol
- Heating voltage (high): 5V ± 0.1
- Heating voltage (low): 1.4V ± 0.1
- Load resistance: Adjustable
- Heating resistance: 33Ω ± 5%
- Heating consumption: less than 800mW
- Detection temperature: 20℃±2℃
- Relative humidity: 65%+-5%RH
- Preheat duration 20 seconds
- Can be used as a digital or analogue sensor
- Â The sensitivity of Digital pin can be varied using the potentiometer
- It has a long life and low cost.
- Possesses high sensitivity to ammonia, benzene, sulfide gases.
- simple drive circuit
MQ8 GAS SENSOR
- Operating Voltage: 3.3 – 5V.
- Type: Analog Sensor.
- Detection range: 100~1000ppm(H2 gas)
- Heating voltage (high): 5V ± 0.1
- Heating voltage (low): 1.4V ± 0.1
- Load resistance: Adjustable
- Heating resistance: 31Ω ± 5%
- Heating consumption: less than 800mW
- Using temperature: -20°C-50°C
- Storage temperature: -20°C-50°C
- Relative humidity: 55%+-5%RH
- High Sensitivity for Hydrogen
- Small sensitivity to alcohol, LPG, cooking fumes