MQ-9 Carbon Monoxide, Methane and LPG Gas Sensor Module
- Input voltage: DC 5V
- Power: 150mA
- DO output: TTL digital 0 and 1 (0.1 and 5V)
- AO output: 0.1-0.3V (relatively clean), the highest concentration voltage is about 4V.
- Suitable for home or factory gas leakage monitoring devices.
- Have better sensitivity to Carbon Monoxide, Methane and LPG Gas.
- High quality dual-panel design, with power indicator and TTL signal output instructions.
- DO switching signal (TTL) output and AO analog signal output.
- TTL output valid signal is low. (When the output low signal is on, it can be directly connected micro-controller or relay module.)
- Analog output voltage: the higher concentration, the higher voltage.
- Four screw holes, easy positioning.
- Long life and stability, quick response and resume.
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
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