Carbon Monoxide Gas Sensor MQ-7

Carbon Monoxide Gas Sensor MQ-7 info

About the Product

Carbon Monoxide Gas Sensor MQ-7 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.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 10 kΩ.

Product Description

• Good sensitivity to combustable gas in wide range
• High sensitivity to natural gas
• Long life and low cost
• Simple drive circuit

Technical Specifications

• Detection Gas: Carbon Monoxide
• Concentration: 10-10000ppm
• Supply Voltage: <10V
• Heater Voltage: 5.0V ± 0.2V
• Load Resistance: Adjustable
• Heater Resistance: 31Ω ± 3Ω
• Heater Consumption: <350mW

Videos

Documents

Carbon Monoxide gas sensor MQ-7 datasheet

References

Pololu Web Site:

https://www.pololu.com/product/1482