Product Description
The MQ-9 Carbon Monoxide, Methane, and LPG Gas Sensor Module can detect carbon monoxide and methane gas. The sensor uses SnO2 as the sensitive material, which has lower conductivity in clean air.
The sensor works by cycling between high and low temperatures. It detects CO at low temperature (heated by 1.5V) and increases its conductivity as the gas concentration rises.
At high temperature (heated by 5.0V), it detects combustible gases such as methane and propane, and clears the other gases that were adsorbed at low temperature.
Wire Connections
VCC – Positive pole (5V)
GND – Negative pole
DO – TTL switch signal output
AO – Analog signal output
Applications
- A device that detects gas leaks in the home
- A device that monitors gas levels in industrial settings
- A device that can be carried around to detect gas hazards
FeaturesÂ
- Good sensitivity to CO/Combustible Gas
- High sensitivity to Methane, Propane, and CO
- Long life and low cost
- Simple drive circuit
Package Includes
- 1 x MQ9 Carbon Monoxide, Methane, and LPG Gas Sensor Module
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