The MQ-9B is a CO and CH₄ petrol detection sensor from Winsen. The sensing material of the MQ-9B is SnO2, which has a low conductivity in clean air.
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The MQ-9B is a CO and CH₄ petrol-detection sensor from Winsen. The sensing material of the MQ-9B is SnO2, which has a low conductivity in clean air. It detects carbon monoxide (1.5V) by cycling between high and low temperatures. The sensor’s conductivity gets higher as the CO and CH₄ petrol concentrations rise. The sensing range is 10-500ppm CH₄. A simple circuit makes measuring this change in conductivity and turning it into data fairly straightforward, but it does require some calibration.
For easy Solderability, use our Petrol Sensor Breakout Board.
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