Sensirion SGP30 Digital Gas Sensor Probe - 1m Stainless Steel Wire, I2C Interface

The SGP30 requires a supply voltage between 3.0V and 3.6V DC. It is not designed for 5V logic directly; if your system uses 5V, you must use a logic level converter or a regulated 3.3V power supply for the sensor's VDD pin to prevent damage.

Connect the sensor's VDD to 3.3V, GND to ground, SCL to your microcontroller's I2C clock line, and SDA to the I2C data line. The default I2C address is 0x58. Use the provided Sensirion library or standard Wire library commands to read the TVOC and CO₂ equivalent data registers.

The SGP30 is factory calibrated and outputs calibrated digital values. However, for optimal accuracy, it is recommended to allow a 12-hour initial burn-in period with continuous power. The sensor features an integrated baseline correction algorithm that runs automatically over longer periods (up to 7 days) to maintain stability.

The probe wire allows you to position the sensitive metal-oxide element away from the main electronics module. This enables sampling air from specific, potentially confined or harsh locations (like inside a duct) while keeping the control circuitry in a more protected environment, improving installation flexibility and sensor longevity.

The SGP30 outputs a CO₂ equivalent (eCO₂) signal derived from its TVOC measurements using a proprietary algorithm. It is not a true NDIR CO2 sensor. For applications requiring precise, absolute CO2 readings (like industrial safety), a dedicated NDIR sensor like the Sensirion SCD4x series is recommended.