MQ-3 Alcohol Sensor Detection Module Breath Gas Detector Ethanol Detection


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  • MQ-3 Alcohol Sensor Detection Module Breath Gas Detector Ethanol Detection

    MQ-3 Alcohol Sensor Detection Module Breath Gas Detector Ethanol Detection


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    •  Delivery & Return


      1. We ship your order worldwide. 2. All orders are shipped with a tracking number. 3. Orders are processed and prepared to be shipped within 2-5 business days. Including quality checks, packing, paperwork, etc. Delivery times may take 3-14 (business days) from the time of purchase to shipping your order worldwide unless it is specified. 3-5 business days delivery time for Expedite shipping(DHL/FedEx/UPS etc) 7-14 business days delivery time for Standard Shipping(EMS/YunExpress etc) Please note that there will be substantial differences in the time of delivery, depending on your country of delivery. During sale periods and promotions the delivery time may be longer than normal.


      1. For whatever reason, if you are not satisfied with your received within 3 days and the product is still in brand new condition and with its original packaging, you can return it to us (need to send back all parts) for a partial refund, which will cover the price of the item minus the shipping fees. You will be responsible for paying the return shipping fees. 2. To start a return, you can contact us. If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted. 3. Your return will usually be processed within a week to a week and a half. We’ll send you a Return Notification email to notify you once the return has been completed. Please allow 1-3 business days for refunds to be received to the original form of payment once the return has been processed.


      Give us a shout if you have any other questions and/or concerns. Email: Phone: (+01)-662-300-6268
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      MQ-3 Alcohol Sensor Detection Module Breath Gas Detector Ethanol Detection

      MQ-3 Alcohol Sensor Detection Module Breath Gas Detector Ethanol Detection


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        Estimated Delivery: Apr 20 – Apr 23
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      1. Using double-sided circuit board design, with power indicator and TTL signal output indicator.
      2. With DO switching signal (TTL) output and analog output AO.
      3. TTL output valid signal is low level. (When the output is low level, the signal light is on, it can be directly connected to the MCU or relay module)
      4. Analog output voltage, The higher the voltage, the higher the concentration.
      5. High sensitivity for the detection of alcohol gas.


      Model: MQ-3
      Detecting gas: alcohol vapor
      Detection concentration: 0.04-4mg/L alcohol
      Standard circuit condition: Loop voltage VC ≤24DC
      Heating voltage:VH 5.0±0.2V AC/DC
      Load resistance: RL adjustable
      Gas sensor characteristics under standard test conditions: Heating resistor 31Ω±3Ω
      Heating power consumption: ≤90mW
      Sensitive surface resistance: 2KΩ-20KΩ (in 0.4mg/L alcohol)
      Sensitivity: Rs (in the air) / Rs (0.4mg / L alcohol) ≥ 5
      Concentration slope: ≤0.6 (R300ppm/R100ppm alcohol)
      Standard test conditions: 20℃±2℃; 65%±5% RH
      Standard test circuit: 5.0V ± 0.1V
      Warm-up time: ≥48 hours
      Electrical Properties:
      Input voltage: DC5V
      Power consumption (current ): 150mA
      DO output: TTL digital 0 and 1 ( 0.1 and 3.3V)
      AO output: 0.1-0 .3V, the highest concentration voltage is about 4V
      Note: After the sensor is powered, needs to warm up around 20S, The measured data was stable, the heat sensor is a normal phenomenon, because the internal heating wire, if hot is not normal.
      Dimension: 32mm*20mm*22mm

      Packing list:

      Weight0.01 kg
      Dimensions3.2 × 2 × 2.2 cm

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