Adafruit SGP40 Air Quality Sensor Breakout – VOC Index – STEMMA QT/Qwiic


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SKU: 1012204
  1. Circuit: SGP40
  2. Supply voltage: 3 V to 5 V
  3. Communication interface: I2C
  4. I2C communication interface address: 0x59
  5. VOC Measuring range: 0 ppm to 1000 ppm
  6. VOC index value Measuring range: 0 to 500
  7. Connectors: STEMMA QT / Qwiic


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Brand: Adafruit
Category: Gas and Dust Sensor
Tags: STEMMA QT/Qwiic, SGP40

Build a digital nose with the SGP40 Multi-Pixel Gas Sensor, a fully integrated MOX gas sensor. This is a very fine air quality sensor from the sensor experts at Sensirion, 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.

The 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. 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. Raw signal from the sensor is processed using their software algorithm to give an overall ‘air quality value from 0 to 500.

This sensor, like all VOC/gas sensors, has variability, and to get precise measurements you will want to calibrate it against known sources! That said, general environmental sensors will give you a good idea of trends and comparisons.

Another nice element of this sensor is the ability to set humidity compensation for better accuracy. 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.

Package Include:

1 x Adafruit SGP40 Air Quality Sensor Breakout – VOC Index – STEMMA QT/Qwiic

SKU: 1012204 Category: Tags: ,


I2C Communication Interface Address


VOC Measuring Range

0 ppm to 1000 ppm

VOC Index Value Measuring Range

0 to 500

Input Supply Voltage (VDC)

3 ~ 5

Communication Interface




Shipping Weight 0.01 kg
Shipping Dimensions 3 × 2 × 1 cm
15 Days Warranty

This item is covered with a standard warranty of 15 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects.  Reimbursement or replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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Country Of Origin: United States (US)