Ethanol Alcohol Gas Sensor Module – MQ-3

$5.95

In stock

  • Sensing Alcohol (Ethanol) Gas
  • Range: 0.04 mg/L to 4 mg/L
  • Analog Output
  • Operating Voltage: 2.5V ~ 5.0V
  • Dimension: 40.0mm * 21.0mm

In stock

SKU: NSE-1044-3 Categories: ,

Description

The MQ-3 alcohol gas sensor detects the concentration of alcohol gas in the air and relays its reading as an analog voltage. Its high sensitivity, fast response, and stable, long life make it ideal for use in a breathalyzer or a car alcohol alarm.  It uses tin oxide which is highly sensitive to alcohol.  The MQ-3 will sense concentrations between 0.05 mg/L to 10 mg/L (the legal limit of breath alcohol concentration in most US states is 0.38 mg/L). The sensor can operate at temperatures from -10 to 50°C and consumes less than 150 mA at 5 V.

\Large \%BAC = \frac{(\textrm{Concentration, mg/L})}{\textrm{1000 mg/g} \times \textrm{10 dL/L}} \times \frac{(\textrm{2100 mg/L Blood})}{(\textrm{1 mg/L Breath})}  \times \frac{\textrm{1 }\%\textrm{BAC}}{\textrm{1 g/dL}}

or

\%BAC = \frac{ 21 \times (\textrm{Concentration, mg/L})}{100}

Technical Specs

  • Supply Voltage: 5 V
  • Supply Current: 150 mA
  • Output Type: Analog
  • Gases Detected: Alcohol (-OH)
  • Concentration Range: 0.05 – 10 mg/L (0.01 – 2.1 %BAC)

Resources

Additional information

Weight0.2 oz
Dimensions2.8 × 2.1 × 0.7 in

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About NightShade Electronics

NightShade Electronics is a company based on the Space Coast of Florida, started to provide electronics enthusiasts with the quality parts they need to make their projects come to life. Always innovating and designing, NightShade seeks to stay in tune with the ever changing needs of its customers.