SGP30 Air Quality Sensor – VOC and eCO2

SGP30 Air Quality Sensor Breakout – VOC and eCO2

Enjoy pure air breathing with the SGP30 Multi-Pixel Gas Sensor, a MOX gas sensor that is completely integrated. Sensor experts at Sensirion devised this amazing air quality sensor, it has I2C interfacing and output signals that are fully calibrated. Within measured values, the typical accuracy is 15%. To grant more exhaustive air quality signals, the SGP30 adds together various metal-oxide sensing elements on a single chip.

The SGP30 Multi-Pixel Gas Sensor can identify an extensive range of VOCs (Volatile Organic Compounds) and H2 which makes it the perfect tool for indoor air quality monitoring. If you connect it to a microcontroller (and run the library code), you will get a reading of the Total Volatile Organic Compound (TVOC) and of the equivalent carbon dioxide reading (eCO2) over I2C.

This product has a “standard” hot-plate MOX sensor, and a small microcontroller, too. Thanks to it you can control power to the plate, track the baseline calibration, read the analog voltage and calculate the values of TVOC and eCO2. In addition, you will be provided with an I2C interface to read from. The SGP30 does not need I2C clock stretching, unlike the CCS811.

Concentration of eCO2 (equivalent calculated carbon-dioxide) will be calculated within a range of 0 to 60,000 parts per million (ppm), while concentration of TVOC (Total Volatile Organic Compound) will be calculated within a range of 0 to 60,000 parts per billion (ppb).

Remember, though, that this sensor, just like all other VOC/gas sensors, may present variability. It needs to be calibrated against established sources to obtain precise measurements. Even so, for general environmental sensors, you will get a roughly wise suggestion of trends and comparison. This SGP30 sensor presents built in calibration capabilities, but remember that the measurement of eCO2 is based on H2 concentration. Note that SGP30 cannot be considered a CO2 sensor for laboratory use.

This sensor, though, presents the great advantage of being able to set humidity compensation to get more accurate readings. It is necessary to have an external humidity sensor, this way you will be able to read the RH% written over I2C to the sensor, and you will get more accurate measures of the TVOC/eCO2 values, too.

This sensor has been placed on a PCB with some level shifting and a 1.8V regulator. This means you can comfortably use it with a 3.3V or 5V microcontroller you prefer.

Technical details are:

• In the SGP30 tutorial you will have access to Software Libraries, datasheets, schematic, hookup guide, EagleCAD PCB files, and Fritzing, too!
• Uses I2C address 0x58
• Dimensions: 17.9mm x 17.9mm x 2.9mm / 0.7″ x 0.7″ x 0.1″
• : 1.1g / 0.0oz

Adafruit name: SGP30 Air Quality Sensor Breakout – VOC and eCO2