Product Description

MQ-9 MQ9 Gas Carbon Monoxide Combustibles Detector Sensor Module for Arduino  Feature:

• Suitable for home or factory gas leak monitoring devices.
• Have a better sensitivity to CARBON MONOXIDE, METANE, LIQUEFIED PETROLEUM GAS.
• High quality dual panel design, with current indicator and TTL signal output instructions.
• Switching signal output (TTL) and AO analog signal output.
• The valid TTL output signal is low. (When the low output signal is on, it can be connected directly to the microcontroller or the relay module.)
• Analog output voltage: the higher concentration, the higher voltage.
• Four screw holes, easy positioning.
• Long life and stability, fast response and CV.