MQ-9 sensor module

The MQ-9 Carbon Monoxide, Methane, and LPG Gas Sensor Module is a versatile sensor designed to detect the presence of carbon monoxide (CO), methane (CH4), and liquefied petroleum gas (LPG).

• Model: MQ-9
• Current Consumption (mA): 150
• Operating Voltage (VDC): 5
• Do output: TTL digital 0 and 1 (0.1 and 5V)
• Ao output: 0.1-0.3V (relatively clean)