CO CARBON MONOXIDE GAS SENSOR MQ9

Description

The CO Carbon Monoxide Gas Sensor Module is a highly sensitive detection module designed to measure carbon monoxide (CO) gas concentrations in the environment. It is equipped with a stable semiconductor sensor that ensures fast response, reliable performance, and long service life. The module provides both analog and digital outputs, making it easy to integrate with Arduino, Raspberry Pi, and other microcontroller platforms. Ideal for use in CO leakage alarms, safety monitoring systems, and smart IoT-based gas detection projects.

Features:

Sensitive material MQ-9 gas sensor is used to clean the air in the lower conductivity of tin dioxide (SnO2).  Simple circuit can be used to change the conductivity , concentration of the gas is converted to the corresponding output signal.

MQ-9 high gas sensor for carbon monoxide, methane, liquefied petroleum gas sensitivity, the sensor can detect a variety of gases containing carbon monoxide and flammable , is a low-cost sensors for a variety of applications .It adopts high quality double panel design with power indication and TTL signal output indication;

It has DO switch signal (TTL) output and AO analog signal output; The TTL output valid signal is low. (When the output is low, the signal light is on, it can be directly connected to the MCU or relay module)The voltage of the analog output, the higher the concentration, the higher the voltage.

It has good sensitivity to gas and natural gas detection. There are four screw holes for easy positioning; Product dimensions: 32 (L) * 20 (W) * 22 (H) Has a long life and reliable stability Fast response recovery characteristics

Specifications:

Target Gas: Carbon Monoxide (CO)

Operating Voltage: 3.3V – 5V DC

Outputs:Analog Output (AO): Proportional to gas concentration

Digital Output (DO): TTL logic signal (adjustable threshold)

Preheat Time: ~20 seconds

Interface: 4-pin header (VCC, GND, AO, DO)