MQ-9 MQ9 Carbon monoxide alarm combustible gas sensor module for arduino

• 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.

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