Please choose which option you would like. Different sensors detect different gasses: MQ-2: For Methane, Butane, LPG, & Smoke. MQ-3: For Alcohol, Ethanol, & Smoke MQ-4: For Methane & CNG Gas MQ-5:...Read More…
Please choose which option you would like. Different sensors detect different gasses:
All sensors work on 5V voltage except:
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