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🌊 Slight dispatch delays possible as we catch up with sale orders, please bear with us 🐨

MICS6814 3-in-1 Gas Sensor Breakout (CO, NO2, NH3)

by Pimoroni

Measure changes in the concentration of gases including carbon monoxide (CO), nitrogen dioxide (NO2), and ammonia (NH3) with this Breakout Garden compatible I2C breakout.

The MICS6814 sensor comprises three semiconductor gas sensors in a single package, and can detect three different groups of gases that are referred to in the datasheet as reducing, oxidising, and NH3. The major gases/vapours that the sensor detects are: carbon monoxide (reducing), nitrogen dioxide (oxidising), and ammonia (NH3), but it is also sensitive to others, including hydrogen, ethanol, and hydrocarbons.

It can be used to make qualitative measurements of changes in gas concentrations, so you can tell broadly if the three groups of gases are increasing or decreasing in abundance. Without laboratory conditions or calibration, you won't be able to say "the concentration of carbon monoxide is n parts per million", for example. There's more info about the MICS6814 sensor and how it works in our Getting Started with Enviro+ tutorial.

This breakout uses a Nuvoton microcontroller which handles the I2C and analog-digital conversion, as well as controlling the sensor's inbuilt heater and the user controllable RGB LED. The LED could be used to indicate when the sensor is running or to notify you visually of gas concentration changes. It's Breakout Garden compatible, which means you can use it with any of our Breakout Garden HATs and pHATs - no soldering required!

It's useful for incorporating into indoor and outdoor air quality monitoring systems, especially if you're interested in monitoring agricultural and vehicle pollution levels.

Features

Kit includes

  • MICS6814 Gas Sensor Breakout
  • 1x5 straight male header
  • 1x5 right angle female header

We've designed this breakout board so that you can solder on the piece of right angle female header and pop it straight onto the bottom left 5 pins on your Raspberry Pi's GPIO header (pins 1, 3, 5, 7, 9).

Software

We've put together a Python library together with examples showing you how to get readings from the sensor and control the LED. 

You can also use this breakout with Raspberry Pi Pico and other RP2040 boards, using C++ or Pirate brand MicroPython.

Notes

  • Dimensions: approx 23 x 20 x 4mm (L x W x H)

32 customer reviews

a year ago
A really neat and easy to use sensor package. Shouldnt take more than an hour to familiarise yourself with it as the library for it is pretty robust and easy to use. Added it to a project of mine (circuit python) and it works just as expected. I really like it!
by Sony about BME280 Breakout - Temperature, Pressure, Humidity Sensor via REVIEWS.io
2 years ago
A great little sensor that is almost 'plug and play'. Just plug it into a board like the Pico Breakout Garden and download the example program to get it going. You really don't need to do much yourself. That said, more accessible, improved documentation, detailing the methods used to set up the device and access data would help deepen understanding of the device and how to develop and modify applications using it.
by Robert about BME280 Breakout - Temperature, Pressure, Humidity Sensor via REVIEWS.io
2 years ago
Useful sensor with a choice of connectors for soldering. Worked seamlessly with a Pico W. Found the literature and information on the Pimoroni website somewhat arcane and less than straightforward to access, but plenty of help available on YouTube
by Robert about BME280 Breakout - Temperature, Pressure, Humidity Sensor via REVIEWS.io
2 years ago
Bought the BME280 breakout as a replacement for the BME280 sensor on an Enviro+ board that had gone awry. After checking with the excellent Pimoroni forum for help, I soldered the board to the GPIO header on the Enviro+ with the supplied header pins. I made use of the address selection trace on the back BME280 breakout board. All now works and is up and running the Luftdaten python script with a small change to the code to allow for the address change to 0x77. Great service from Pimoroni, ordered on Tuesday and arrived on Thursday.
by Mike about BME280 Breakout - Temperature, Pressure, Humidity Sensor via REVIEWS.io
3 years ago
Instructions on how to use it and set up are good. Got it all working without hassle and used it as a project to team my kids to solder, which went well. Readings seem to be accurate and correspond with other local weather stations in the year.
by John about BME280 Breakout - Temperature, Pressure, Humidity Sensor via REVIEWS.io
4 years ago
These sensors work as they should, I couldn't find how to access specific addresses using the pimoroni python library examples but a search led me to install the RPi.bme280 libràry (sudo pip install RPi.bme280) and I was able to read from two dme280 sensors connected in parallel using addresses 0x76 and 0x77.
by Anonymous about BME280 Breakout - Temperature, Pressure, Humidity Sensor via REVIEWS.io
4 years ago
Handy little sensor.. I am using this to provide a data feed to the magic mirror smart dashboard I have at home to keep an eye on indoor conditions. Fantastic. Try to keep the unit few cms away from the pi..it is quite sensitive to any heat.
by Badrinath about BME280 Breakout - Temperature, Pressure, Humidity Sensor via REVIEWS.io

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