{"product_id":"adafruit-scd-41-true-co2-temperature-and-humidity-sensor-stemma-qt-qwiic","title":"Adafruit SCD-41 - True CO2 Temperature and Humidity Sensor","description":"\u003cp\u003eThe SCD-41 is a photoacoustic 'true' CO2 sensor that will tell you the CO2 PPM (parts-per-million) composition of ambient air.\u003c\/p\u003e\n\u003cp\u003eTake a deep breath in...now slowly breathe out. Mmm isn't it wonderful? All that air around us, which we bring into our lungs, extracts oxygen from and then breathes out carbon dioxide. CO2 is essential for life on this planet we call Earth - we and plants take turns using and emitting CO2 in an elegant symbiosis. But it's important to keep that CO2 balanced - you don't want too much around, not good for humans and not good for our planet.\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener noreferrer\" href=\"\/en-eu\/products\/adafruit-sgp30-air-quality-sensor-breakout-voc-and-eco2\" target=\"_blank\"\u003eUnlike the SGP30, this sensor isn't approximating it from VOC gas concentration\u003c\/a\u003e - \u003cstrong\u003eit really is measuring the CO2 concentration!\u003c\/strong\u003e That means it's bigger and more expensive, but it is the real thing. Perfect for environmental sensing, scientific experiments, air quality and ventilation studies, and more.\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener noreferrer\" href=\"\/en-eu\/products\/adafruit-scd-30-ndir-co2-temperature-and-humidity-sensor-stemma-qt-qwiic\" target=\"_blank\"\u003eCompared to the illustrious SCD-30\u003c\/a\u003e, this sensor uses a different measurement technique, which allows it to be much smaller. The overall data quality should be very similar, however. Like the SCD-30, this sensor has data read over I2C, so it works very nicely with just about any microcontroller or microcomputer. There's both Arduino and Python\/CircuitPython code so you can get started in a jiffy.\u003c\/p\u003e\n\u003cp\u003eThere are two variants of this sensor - the SCD-40 and SCD-41\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003cstrong\u003eSCD-40\u003c\/strong\u003e is lower cost and is perfect for indoor\/outdoor air quality and CO2 measurements. It has a range of \u003cstrong\u003e400~2000 ppm\u003c\/strong\u003e with an accuracy of ±(50 ppm + 5% of reading)\u003c\/li\u003e\n\u003cli\u003eThe \u003cstrong\u003eSCD-41\u003c\/strong\u003e is more expensive, and while it can definitely be used for air quality, it's wide range means it's best used for industrial or scientific CO2 measurements where the ppm can get very high. It has a range of \u003cstrong\u003e400~5000 ppm\u003c\/strong\u003e with an accuracy of ±(40 ppm + 5% of reading)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNice sensor, right? So Adafruit made it easy for you to get right into your next project. The sensor is soldered onto a custom-made PCB in the \u003ca rel=\"noopener noreferrer\" href=\"\/en-eu\/collections\/stemma-qt\" target=\"_blank\"\u003eSTEMMA QT\u003c\/a\u003e form factor, making them easy to interface with. The \u003ca rel=\"noopener noreferrer\" href=\"https:\/\/learn.adafruit.com\/introducing-adafruit-stemma-qt\/what-is-stemma-qt\" target=\"_blank\"\u003eSTEMMA QT connectors\u003c\/a\u003e on either side are compatible with the SparkFun Qwiic I2C connectors. This allows you to make solderless connections between your development board and the SCD-4x or to chain it with a wide range of other sensors and accessories using a \u003ca rel=\"noopener noreferrer\" href=\"\/en-eu\/products\/jst-sh-cable-qwiic-stemma-qt-compatible\" target=\"_blank\"\u003ecompatible cable.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eThis sensor can run from 3.3 to 5V but it's more important for it to have a quiet power supply with low ripple, than any particular voltage. For that reason, Adafruit have added a 3.3V regulator and level shifters: when connecting to a 5V microcontroller like an Arduino UNO the 5V supply is often shared with other electronic components that add noise. The onboard regulator will keep the voltage nice and quiet. For advanced hackers, they can cut\/solder the backtraces to change whether the regulator is enabled and what I2C logic level is desired.\u003c\/p\u003e\n\u003ch2\u003eTECHNICAL DETAILS\u003c\/h2\u003e\n\u003cp\u003eSCD-41 Specifications:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePhotoacoustic CO2 sensor technology\u003c\/li\u003e\n\u003cli\u003eIntegrated temperature and humidity sensor\u003c\/li\u003e\n\u003cli\u003eMeasurement range: 400 ppm – 5000 ppm\u003c\/li\u003e\n\u003cli\u003eAccuracy: ±(40 ppm + 5 % of reading)\u003c\/li\u003e\n\u003cli\u003eCurrent consumption: 17 mA (meas. rate = 5 s) \/ 0.5 mA (meas. rate = 5 min)\u003c\/li\u003e\n\u003cli\u003eFully calibrated and linearized\u003c\/li\u003e\n\u003cli\u003eI2C digital interface address 0x61\u003c\/li\u003e\n\u003cli\u003eSensor Element Size: 10.1mm x 10.1mm x 6.5 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eProduct Dimensions: 25.5mm x 22.8mm x 7.7mm \/ 1.0\" x 0.9\" x 0.3\"\u003c\/p\u003e\n\u003cp\u003eProduct Weight: 2.8g \/ 0.1oz\u003c\/p\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":39432800796755,"sku":"ADA5190","price":44.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/5190-00.jpg?v=1629467111","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/adafruit-scd-41-true-co2-temperature-and-humidity-sensor-stemma-qt-qwiic","provider":"Pimoroni Ltd","version":"1.0","type":"link"}