{"product_id":"adafruit-sgp40-air-quality-sensor-breakout-voc-index-stemma-qt-qwiic","title":"Adafruit SGP40 Air Quality Sensor Breakout - VOC Index - STEMMA QT \/ Qwiic","description":"\u003ch2\u003e\u003cstrong\u003e Description:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe SGP40 has a 'standard' hot-plate MOX sensor, as well as a small microcontroller that controls power to the plate, reads the analog voltage and provides an I2C interface to read from. Unlike the CCS811, this sensor does not require I2C clock stretching.\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/github.com\/adafruit\/Adafruit_SGP40\"\u003eWe currently have an Arduino library with examples of reading the raw value and also running the Sensirion algorithm to calculate VOC index\u003c\/a\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/github.com\/adafruit\/Adafruit_CircuitPython_SGP40\"\u003ea Python\/CircuitPython library\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003ethat can be used with Linux computers like the Raspberry Pi or our CircuitPython boards.\u003c\/p\u003e\n\u003cp\u003eThis is a gas sensor that can detect a wide range of Volatile Organic Compounds (VOCs) and H2 and is intended for indoor air quality monitoring.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eThe SGP40 is the next generation after the SGP30, but does not give TVOC\/eCO2 values out like the SGP30.\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eInstead,\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/github.com\/Sensirion\/embedded-sgp\/tree\/master\/sgp40_voc_index\"\u003eraw signal from the sensor is processed using their software algorithm to give an overall 'air quality' value form 0 to 500.\u003c\/a\u003e\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 to this sensor is the ability to set humidity compensation for better accuracy.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/github.com\/adafruit\/Adafruit_SGP40\/blob\/master\/examples\/sgp40_voc\/sgp40_voc.ino\"\u003eAn external humidity sensor is required and then the RH% is written over I2C to the sensor\u003c\/a\u003e, 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 href=\"https:\/\/www.adafruit.com\/?q=stemma%20qt%20sensor\" title=\"STEMMA QT form factor\"\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 SGP40 or to chain it with a wide range of other sensors and accessories using a \u003cstrong\u003ecompatible cable\u003c\/strong\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 so allow you to use it with either 3.3V or 5V systems such as the Arduino Uno, or Feather M4.\u003cbr\u003e\u003ca href=\"https:\/\/github.com\/adafruit\/Adafruit_SGP40\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-end=\"1932\" data-start=\"1888\"\u003eSensor Type: SGP40 (VOC and H₂ gas sensor)\u003c\/li\u003e\n\u003cli data-end=\"2000\" data-start=\"1935\"\u003eVOC Index Range: 0–500 (calculated using Sensirion’s algorithm)\u003c\/li\u003e\n\u003cli data-end=\"2057\" data-start=\"2003\"\u003eDetectable Gases: Broad range of VOCs, Hydrogen (H₂)\u003c\/li\u003e\n\u003cli data-end=\"2107\" data-start=\"2060\"\u003eInterface: I²C (no clock stretching required)\u003c\/li\u003e\n\u003cli data-end=\"2160\" data-start=\"2110\"\u003eOperating Voltage: 3.3 V or 5 V logic compatible\u003c\/li\u003e\n\u003cli data-end=\"2235\" data-start=\"2163\"\u003eAdditional Features: Humidity compensation support via external sensor\u003c\/li\u003e\n\u003cli data-end=\"2290\" data-start=\"2238\"\u003eForm Factor: STEMMA QT \/ SparkFun Qwiic compatible\u003c\/li\u003e\n\u003cli data-end=\"2343\" data-start=\"2293\"\u003eOnboard 3.3 V regulator and logic-level shifting\u003c\/li\u003e\n\u003cli data-end=\"2343\" data-start=\"2293\"\u003eCode: 4829\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003ePacking List:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × SGP40 Indoor Air Quality Sensor Breakout Board\u003c\/li\u003e\n\u003cli\u003e1 × Set of header pins (requires soldering)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":42292905115839,"sku":"MLE01168","price":1249.0,"currency_code":"PHP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0531\/3419\/6927\/files\/MLE01168.jpg?v=1754708958","url":"https:\/\/makerlab.ph\/products\/adafruit-sgp40-air-quality-sensor-breakout-voc-index-stemma-qt-qwiic","provider":"Makerlab PH","version":"1.0","type":"link"}