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VOC sensor MQ138 breakout-Sensors
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  • VOC sensor MQ138 breakout-Sensors
  • VOC sensor MQ138 breakout-Sensors
  • VOC sensor MQ138 breakout-Sensors
  • VOC sensor MQ138 breakout-Sensors
VOC sensor MQ138 breakout
SKU: 333114
€29,95
19 items available

Add-Ons

24/7 lifetime customer and technical support

2-year Warranty -no questions asked

Comprehensive Documentation

Open-source everything

Description

The MQ138 sensor is specifically designed to detect various gases, with a primary focus on air quality monitoring. While its main target gas is formaldehyde (HCHO), it is also sensitive to a range of other gases, including volatile organic compounds (VOCs - toulen, alcohol, acetone and hydrogen) and other harmful gases commonly found in the environment. It takes a short time to heat up in order to work correctly.

 

The breakout board works with both digital (DO) and analog signals (AO). The digital output is obtained by setting a threshold value with a potentiometer. The analog output will differ depending on the intensity of the gas.

 

Product usage tips:

 

When gas is detected, the LED will start glowing. It will remain off if it doesn’t detect anything. Two mounting holes enable easy mounting to surfaces. The board comes with four male headers that need to be soldered.
Complimentary technical support

In case you ever get stuck with using this product, you can count on us. We provide free, no-strings-attached technical support with this product. Just reach out to us with your questions, and we'll be there to help you.
Open-source

Open-source culture is rooted deep inside us, and that’s reflected in our products. This product follows the open-source principle. It was made with the community’s suggestions and needs in mind. With a modular design, it can be modified to your needs and incorporated into your projects. We provide all the design documentation needed free of charge on our Github repository.
Qwiic

Our Qwiic ecosystem provides plug‑and‑play connectors for solderless connections, enabling you to add sensors and modules without wiring errors. Get up and running in seconds, whether you’re a beginner or a professional. Full documentation is available on our Qwiic page so you can explore all features and supported modules.
Made in EU

Soldered products, designed and manufactured in Croatia, are thoroughly tested and meet the highest EU standards of quality and safety.

Technical Specifications

  • Voltage: 5V
  • Digital(HIGH/LOW) and analog(0V-5V) output
  • With LM393 comparator
  • Dimensions: 22 x 38 mm / 0.9 x 1.5 inch

Resources & Documentation

DEVELOPMENT & RESOURCES
PINOUT DRAWING PRODUCT DATASHEET HARDWARE DETAILS ARDUINO LIBRARY DOCUMENTATION
DOCUMENTATION & TUTORIALS
FULL PRODUCT DOCUMENTATION GETTING STARTED WITH ARDUINO

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