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Gas Sensors
 
 

   

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  1. Alcohol Gas Sensor MQ-3

    Alcohol Gas Sensor MQ-3

    $5.35

    This alcohol sensor is suitable for detecting alcohol concentration on your breath, just like your common breathalyzer. It has a high sensitivity and fast response time. Sensor provides an analog resistive output based on alcohol concentration. The drive circuit is very simple, all it needs is one resistor. A simple interface could be a 0-3.3V ADC.

    Please review the datasheet for conversions to ppm then Wikipedia.org for BAC.

    Features:
    • 5V DC or AC circuit
    • Requires heater voltage
    • Operation Temperature: -10 to 70 degrees C
    • Heater consumption: less than 750mW
    Dimensions:
    • 16.8mm diameter
    • 9.3 mm height without the pins
    Documents:
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  2. Carbon Monoxide Sensor - MQ-7

    Carbon Monoxide Sensor - MQ-7

    $5.50

    This is a simple-to-useCarbon Monoxide (CO) sensor, suitable for sensing CO concentrations in the air. The MQ-7 can detect CO concentrations anywhere from 20 to 2000ppm.

    This sensor has a high sensitivity and fast response time. The sensor's output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC.

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  3. Methane CNG Gas Sensor - MQ-4

    Methane CNG Gas Sensor - MQ-4

    $5.89

    This is a simple-to-use compressed natural gas (CNG) sensor, suitable for sensing  natural gas (composed of mostly Methane [CH4]) concentrations in the air. The MQ-4 can detect natural gas concentrations anywhere from 200 to 10000ppm.

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  4. LPG Gas Sensor - MQ-6

    LPG Gas Sensor - MQ-6

    $5.50

    This is a simple-to-use liquefied petroleum gas (LPG) sensor, suitable for sensing  LPG (composed of mostly propane and butane) concentrations in the air. The MQ-6 can detect gas concentrations anywhere from 200 to 10000ppm.

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  5. Carbon Monoxide Sensor - MQ-7

    Carbon Monoxide Sensor - MQ-7

    $5.99

    This is a simple-to-use Carbon Monoxide (CO) sensor, suitable for sensing CO concentrations in the air. The MQ-7 can detect CO-gas concentrations anywhere from 20 to 2000ppm. Learn More
  6. Hydrogen Gas Sensor - MQ-8

    Hydrogen Gas Sensor - MQ-8

    $6.39

    This is a simple-to-use hydrogen gas sensor, suitable for sensing hydrogen concentrations in the air. The MQ-8 can detect hydrogen gas concentrations anywhere from 100-10000ppm. This sensor has a high sensitivity and fast response time. The sensor's output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC. Learn More
 
 

   

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