Alcohol Gas Sensor MQ-3
This semiconductor gas sensor detects the presence of alcohol gas at concentrations from 0.04 mg/L to 4 mg/L, a range suitable for making a breathalyser. The sensor’s simple analog voltage interface requires only one analog input pin from your microcontroller.
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Gas sensor with blue plastic case with quarter for size reference. |
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Gas sensor with blue plastic case bottom view. |
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Gas sensor with blue plastic case top view. |
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