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Pololu LPG / Isobutane / Propane Gas Sensor MQ-6

List price: £5.26
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This propane gas sensor detects the concentrations of LPG, isobutane, and propane in the air and ouputs its reading as an analog voltage. The sensor can measure concentrations of 300 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 datasheet (178k pdf) below for more information about the sensor.


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. Please note that the picture in the datasheet for the top configuration is wrong. Both configurations have the same pinout consistent with the bottom configuration.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 kOhms.

We offer breakout boards that make it easier to interface with these sensors, see related products links below.


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Dear David, can you please tel me that how can i calculate Rs and Ro values for different concentrations of lpg gas

Asked by akshay kashyap | 28/09/2013, 10:38 | 0 answer(s)

As far as i can see it's not actually possible to calculate sensitivity from the equations in the datasheet - anyone fancy trying? I think I need to know Ro...

Asked by David Berry | 31/12/2012, 11:57 | 1 answer(s)

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