MQ9 Carbon Monoxide Alarm Combustible Gas Sensor Module for Arduino

SKU: 180848

1.50 1.50 Piece 1.5 USD

¥ 11.00

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  • For home or factory gas leakage monitoring devices, suitable for carbon monoxide and other combustible gases and monitoring devices

  • 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 light is on, it can be directly connected microcontroller or relay module)

  • Analog output voltage:the higher the concentration,the higher the voltage

  • Have better sensitivity to carbon monoxide detector

  • Four screw holes,easy positioning

  • Product Dimensions: 32 (L) * 20 (W) * 22 (H)

  • Long life and stability

  • Quick response and resume

Electrical performance:

  • Input voltage: DC5V

  • Power (current): 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

  • Special note: When the sensor is powered, it needs to be warmed up about 20S, so the measured data becomes stable, the heat sensor is a normal phenomenon, because its inside is with an electric wire, if not, unnomal.


  • Product Model:MQ-9

  • Product Type:Semiconduct-gassensitive element

  • Gas Detected:Carbon monoxide,Combustible gas

  • Detectable Concentration:10-1000ppmCO, 100-10000PPM gas