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Gas sensors makes it possible to measure concentrations of gasses such as alcohol, methane, propane, butane, and carbon monoxide.
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Pololu Carbon Monoxide Gas Sensor MQ-7
Item Details
Pololu Carbon Monoxide Gas Sensor MQ-7
Item Name:
Pololu Carbon Monoxide Gas Sensor MQ-7
Item #:
TS-056-MQ7
Manufacturer:
Pololu
MPN:
1482
Your Price:
$6.95
Availability:
13 Ready to Ship!
Quantity:

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Description

This Carbon Monoxide (CO) gas sensor 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. Please read the MQ7 datasheet (185k pdf) for more information about the sensor.

Connections

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 kO.

We offer a Pololu breakout board that makes it easier to interface with these sensors.

Documentation

 



This semiconductor gas sensor detects the presence of Carbon Monoxide at concentrations from 10 to 10,000 ppm. The sensor’s simple analog voltage interface requires only one analog input pin from  your microcontroller.
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