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Description
Product information "Adafruit SGP40 Air Quality Sensor Breakout - VOC Index"
The SGP40 has a "standard" hot plate MOX sensor and a small microcontroller that controls the power supply to the plate, reads the analogue voltage and provides an I2C interface for readout. Unlike the CCS811, this sensor does not require an I2C clock extension. We currently have an Arduino library with examples for reading the raw value and also for running the Sensirion algorithm to calculate the VOC index, but do not have Python support (the Sensirion library is in C and requires a port)
This 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. The SGP40 is the next generation after the SGP30, but does not output TVOC/eCO2 values like the SGP30. Instead, the raw signal from the sensor is processed using the software algorithm to give an overall "air quality" value from 0 to 500.
Please note that this sensor, like all VOC/gas sensors, has variations and to get accurate readings you need to calibrate it against known sources! That said, for general environmental sensors, it will give you a good idea of trends and comparisons.
Another nice feature on this sensor is the ability to set humidity compensation for better accuracy. An external humidity sensor is required and then the RH% is written to the sensor via I2C so that the MOX sensor reading can be better calibrated and humidity and temperature related fluctuations are reduced.
Nice sensor, right? So we've made it easy for you so you can jump straight into your next project. The surface mount sensor is soldered onto a customised PCB in the STEMMA QT form factor, making it easy to connect. The STEMMA QT connectors on both sides are compatible with the SparkFun Qwiic I2C connectors. This allows you to make solderless connections between your development board and the SGP40 or daisy chain it with a variety of other sensors and accessories using a compatible cable. QT cable is not included.
We have of course broken out all pins to standard headers and added a 3.3V voltage regulator and level shifting so you can use it with either 3.3V or 5V systems such as the Arduino Uno or Feather M4.
Properties
| Zolltarifnummer: | 85423111 |
|---|---|
| Brand: | Adafruit |
| Country of Origin: | USA |
| EAN: | 4060137067587 |
| Gross Weight (kg): | 0.003 |
| Manufacturer ID: | 4829 |
| Product ID: | ADA4829 |
Manufacturer
Adafruit
Adafruit: The expert for open source hardware
For more than ten years, programmers and tinkerers have benefited from the expertise of the Adafruit brand. Whether for beginners or proven experts, Adafruit has the right hardware components ready for your next IoT project.
Light comes into the dark with Adafruit NeoPixel
One extremely popular product line from the company's broad portfolio is Adafruit NeoPixel. These nifty LED components come in a wide variety of designs and color temperatures. NeoPixel modules are available, for example, in the form of a practical stick with five intelligent LEDs in red, green and blue (RGB) or in white (W), as a shield with 40 eye-saving RGBW LEDs in which all pixels are individually addressable, and as a jewel with seven RGBW LEDs that can be controlled with 8-bit PWM per channel.
Especially popular is the Adafruit NeoPixel Ring with 16 ultra-bright, intelligent RGB LEDs including integrated drivers, which you only need a single microcontroller to control. The trick is that the Adafruit NeoPixel rings form a chain, so to speak: You couple the output pin of one with the input pin of the other.
With the Adafruit NeoPixel products you can realize a wide variety of projects - there are virtually no limits to your creativity. With the help of an Arduino, a jumper cable and the appropriate software, you can control a NeoPixel ring individually and light up the small LEDs as you wish - either individually or in a specific combination. This way, you can also create your own Vu meter with the versatile LED components. Practical: To make programming Adafruit NeoPixel easier, Adafruit provides an Arduino library as well as a Python library.
Adafruit Feather Boards: Powerful hardware in a compact format
With Adafruit Feather, the hardware specialist from the States also has various powerful development boards in its range, which are essentially equivalent to an Arduino in terms of function. All of these boards are equipped with similar features; among other things, the pin assignment is the same and there are also many parallels when it comes to the microcontrollers and the battery charging properties. In addition, you can also find Feather boards with special devices like Bluetooth, Wi-Fi and cellular network connectivity as well as boards with microSD slot in Adafruit's product range. The name "Feather" is no coincidence: The boards are also characterized by being particularly compact and, above all, lightweight.
The range of top-class product highlights is wide: The STM32F405 Feather, for example, is the fastest CircuitPython board from Adafruit with an outstanding 168 MHz and meets the highest demands. It is equipped with a STEMMA QT / Qwiic port at the end, which makes it easy to connect to I2C sensors. The Adafruit Feather nRF52840 Express, on the other hand, shines with Bluetooth Low Energy and can also be used with CircuitPython thanks to native USB support.
Another important part of Adafruit's portfolio are the FeatherWings. With these expansion modules, you can also include components such as a display or a motor driver in your IoT project. The FeatherWing Proto is a proven classic in Adafruit's portfolio. This is ideally suited as a prototyping add-on for all Feather boards. The Adafruit FeatherWing Wing Tripler Mini Kit, on the other hand, is ideal if you want to connect a Feather to two other FeatherWings at the same time.
With the Adafruit MIDI FeatherWing Kit you get a music capable FeatherWing, thanks to which you can equip your Feather with MIDI input and output jacks. And with the Adafruit FeatherWing OLED you can easily add a small OLED display to your Feather board - no soldering required.
Adafruit: What's behind the brand
As an expert in open-source hardware, Adafruit has long since established itself in the electronics industry. The company was founded in 2005 by Limor Fried. At the time, the talented and innovative electrical engineer was still a student at the renowned Massachusetts Institute of Technology (MIT). To this day, Fried is CEO of the electronics giant, which is now headquartered in New York. The company's name also goes back to its founder: Fried was once known on the World Wide Web by the nickname "Ladyada" - a tribute to the famous IT pioneer Ada Lovelace.
Adafruit says it is committed to getting more people excited about technology and science - and thanks to its first-class products, the hardware expert from the USA is sure to succeed!
Manufacturer and safety information
Adafruit Industries, LLC
168 39th Street 1905CC
US 11232 Brooklyn, New York
https://www.adafruit.com
support@adafruit.com
WEEE number: 20453810
Person responsible for the EU
Sertronics GmbH
Am Studio 20d
DE 12489 Berlin
https://www.berrybase.de
info@berrybase.de
Safety instructions
- Use product only in well ventilated areas.
- Avoid direct contact with water or humid environments.
- Read and follow the operating instructions carefully before use.
- Use the sensor away from flammable or explosive materials.
- Ensure connection to a suitable power source in accordance with the specifications.
- In the event of damage or malfunctions, disconnect from the power supply immediately.
- Protect from heat sources and direct sunlight.
- Dispose of in accordance with local regulations for electronic devices and hazardous substances.
- Never touch gas or dust sensors directly with bare hands.
- Do not use for applications in safety-critical systems without additional protective mechanisms.
Reviews 2
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2 reviews
31 August 2025 08:18
Viel besser als gedacht
Die Geruchserkennenung ist wirklich erstaunlich. Ich verwende diesen zusammen mit dem BerryBase BME280. Der BME280 liefert Temperatur und Lufteuchtigkeitswerte, aus diesem dann der VOC Index berechnet wird.
Nach ca. 1 Minute hat sich der SGP40 an die Umgebung angepasst und reagiert bei mir deutlich, wenn ich die Schale eines Kohlrabis an den Sensor halte, da Kohlrabis bekanntlich stark "riechen".
Auch Zigarettenrauch wird erkannt. Die Nachbarn der Wohnung unter mir rauchen oft auf ihrem Balkon und der Zigarettenrauch zieht dann teilweise auch auch meinen. Obwohl der Zigarettenrauch dann in verdünnter Form ankommt, klappt die Erkenung. Die Stromaufnahme ist nur minimal. Näheres findet sich im Datenblatt des SGP40.
21 March 2022 00:00
Sehr interessanter und sinnvol...
Sehr interessanter und sinnvoller Sensor zur Messung der Luftqualität
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