{"product_id":"adafruit-ens161-mox-gas-sensor-stemma-qt-qwiic","title":"Adafruit ENS161 MOX Gas Sensor - STEMMA QT \/ Qwiic","description":"\u003cp\u003e*sniff* *sniff* ... do you smell that? No need to stick your nose into a carton of milk anymore, you can build a digital nose with the ENS161 Gas Sensor, a fully integrated MOX gas sensor.\u003c\/p\u003e\n\u003cp\u003eThis is a very fine air quality sensor from the sensor experts at \u003ca href=\"https:\/\/www.sciosense.com\/intuitive-air-quality-insights-ens161\/\"\u003eScioSense\u003c\/a\u003e, with I2C interfacing so you don't have to manage the heater and analog reading of a MOX sensor. It combines multiple metal-oxide sensing and heating elements on one chip to provide more detailed air quality signals.\u003c\/p\u003e\n\u003cp\u003eThe ENS161 is an update to the popular ENS160 (the replacement for the \u003ca href=\"https:\/\/www.sciosense.com\/products\/environmental-sensors\/ccs811\/\"\u003epopular, but now-discontinued CCS811\u003c\/a\u003e.)  The ENS161 has the same four-part gas sensor and I2C\/SPI interface but with improved built-in eCO2 and TVOC algorithms plus a new Air Quality Index (AQI) output.\u003c\/p\u003e\n\u003cp\u003eThe ENS161 has a 'standard' hot-plate MOX sensor divided into 4 sections, as well as a small microcontroller that controls power to the plate, reads the analog voltage, and provides an I2C interface to read from. \u003ca href=\"https:\/\/github.com\/sciosense\/ens16x-arduino\"\u003eScioSense provides an Arduino library with examples of reading the four raw resistance values and also the TVOC and eCO2,\u003c\/a\u003e and \u003ca href=\"https:\/\/github.com\/adafruit\/Adafruit_CircuitPython_ENS160\"\u003ea Python\/CircuitPython library\u003c\/a\u003e that can be used with Linux computers like the Raspberry Pi or our CircuitPython boards.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note, this sensor, like all VOC\/gas sensors, has variability, and to get precise measurements you will want to calibrate it against known sources!\u003c\/strong\u003e That said, for general environmental sensors, it will give you a good idea of trends and comparison.\u003c\/p\u003e\n\u003cp\u003eAnother nice element of this sensor is \u003ca href=\"https:\/\/github.com\/sciosense\/ens16x-arduino\/tree\/main\/examples\/02_Temperature_and_RH_compensation\"\u003ethe ability to set temperature and humidity compensation for better accuracy\u003c\/a\u003e. An external humidity sensor is required and then the RH% is written over I2C to the sensor, so it can better calibrate the MOX sensor reading and reduce humidity\/temperature-based variations.\u003c\/p\u003e\n\u003cp\u003eNice sensor right? So we made it easy for you to get right into your next project. The surface-mount sensor is soldered onto a custom-made PCB in the \u003ca title=\"STEMMA QT form factor\" href=\"\/en-au\/collections\/qw-st\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003eSTEMMA QT\u003c\/strong\u003e form factor\u003c\/a\u003e, making them easy to interface with. The \u003ca href=\"https:\/\/learn.adafruit.com\/introducing-adafruit-stemma-qt\/what-is-stemma-qt\"\u003eSTEMMA QT connectors\u003c\/a\u003e on either side are compatible with the \u003ca href=\"https:\/\/www.sparkfun.com\/qwiic\"\u003eSparkFun Qwiic\u003c\/a\u003e I2C connectors. This allows you to make solderless connections between your development board and the ENS161 or to chain it with a wide range of other sensors and accessories using a \u003ca href=\"\/en-au\/products\/jst-sh-cable-qwiic-stemma-qt-compatible\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003ecompatible cable\u003c\/strong\u003e\u003c\/a\u003e. \u003ca href=\"\/en-au\/products\/jst-sh-cable-qwiic-stemma-qt-compatible\" target=\"_blank\" rel=\"noopener\"\u003eQT Cable is not included, but we have a variety in the shop\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eWe’ve of course broken out all the pins to standard headers and added a 3.3V voltage regulator and level shifting to allow you to use it with either 3.3V or 5V systems, such as the Arduino Uno, or Feather M4.\u003c\/p\u003e\n\u003ch2\u003eTechnical Details\u003c\/h2\u003e\n\n\u003cp\u003eProduct Dimensions: 25.5mm x 17.7mm x 4.7mm \/ 1.0\" x 0.7\" x 0.2\"\u003c\/p\u003e\n\u003cp\u003eProduct Weight: 1.6g \/ 0.1oz\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn-shop.adafruit.com\/product-files\/6431\/ENS161-Datasheet.pdf\"\u003eDatasheet\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eLearn\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-ens161-mox-gas-sensor\"\u003ePrimary Guide: Adafruit ENS161 MOX Gas Sensor\u003c\/a\u003e\u003cbr\u003e\nSmell the air over I2C\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/learn.adafruit.com\/products\/6431\/guides\" target=\"_blank\" rel=\"noopener\"\u003eSee All Guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":57079726539125,"sku":"ADA6431","price":17.5,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0389\/1025\/files\/6431-00.jpg?v=1776439276","url":"https:\/\/wholesale.pimoroni.com\/en-au\/products\/adafruit-ens161-mox-gas-sensor-stemma-qt-qwiic","provider":"Pimoroni Wholesale","version":"1.0","type":"link"}