Carbon Monoxide & Flammable Gas Sensor MQ-9

Carbon Monoxide & Flammable Gas Sensor MQ-9 info

About the Product

Carbon Monoxide & Flammable Gas Sensor MQ-9 detects the concentrations of CO in the air and ouputs its reading as an analog voltage. The sensor can measure concentrations of 10 to 10,000 ppm for CO and 100 to 10000ppm for flammable gas. The sensor can operate at temperatures from -10 to 50°C and consumes less than 150 mA at 5 V.

Connecting five volts across the heating (H) pins keeps the sensor hot enough to function correctly. Connecting five volts at either the A or B pins causes the sensor to emit an analog voltage on the other pins. A resistive load between the output pins and ground sets the sensitivity of the detector. The resistive load should be calibrated for your particular application using the equations in the datasheet, but a good starting value for the resistor is 20 kΩ.

Product Description

• Good sensitivity to CO/Flammable Gas in wide range
• High sensitivity to Methane/Propane and CO
• Long life and low cost
• Simple drive circuit

Technical Specifications

• Detection Gas: Carbon Monoxide and Flammable Gas
• Concentration: 10-10000ppm CO, 100-10000ppm Combustible Gas
• Supply Voltage: <10V
• Heater Voltage: 5.0V ± 0.2V (High), 1.5V ± 0.1V (Low)
• Load Resistance: Adjustable
• Heater Resistance: 31Ω ± 3Ω
• Heater Consumption: <350mW

Videos

Documents

Carbon Monoxide and flammable gas sensor MQ-9 datasheet 

References

Pololu Web Site:

https://www.pololu.com/product/1483