MQ-9

General Description:

This MQ-9 Carbon Monoxide, Methane, and LPG Gas Sensor Module can be used to sense Carbon Monoxide and Methane Gas. The sensitive material of the MQ9 gas sensor is SnO2, which with lower conductivity in clean air. It makes detection by the method of cycle high and low temperature and detects CO when the low temperature (heated by 1.5V). The sensor's conductivity is higher along with the gas concentration rising. When a high temperature (heated by 5.0V), it detects Methane, Propane, etc. combustible gas and cleans the other gases adsorbed under low temperature.

Working Principle:

This MQ9 Smoke Sensor contains a sensing element, mainly aluminum-oxide-based ceramic, coated with Tin dioxide (SnO2), enclosed in a stainless-steel mesh. Whenever gas comes into contact with the sensing element, the resistivity of the element changes. The change is then measured to get the concentration of the gases present. It has a small heating element present which is needed to preheat the sensor to get it in the working window. It can detect LPG, Propene, Hydrogen, Carbon Monoxide, and Methane Gas concentrations. It finds uses in detecting gas leakage in pipelines and alarm applications in case of a gas leak at home as CO is a very harmful gas and can kill a person if present over 300PPM.

Specifications:

1. This sensor operates with 5V DC.
2. It detects hydrogen concentration within the air.
3. Resistant to smoke, LPG, and alcohol.
4. Power consumption of the heater is below 800mW.
5. Detection range: 100-1000ppm.
6. Dual signal output (analog and TTL).
7. Quick response .
8. Reliable and long service life.
9. Very sensitive to Hydrogen gas.

Applications:

1. Domestic gas leakage detector.
2. Industrial gas detector.
3. Portable gas detector.