Seeed Studio Studio Grove SGP41 Smart Air Quality Sensor (VOC & NOx) - I2C Grove Interface

The module is designed to operate with both 3.3V and 5V DC power supplies, making it directly compatible with most common microcontrollers like Arduino (5V) and Raspberry Pi/ESP32 (3.3V) without requiring a logic level shifter.

The sensor communicates via the I2C protocol through its standard 4-pin Grove connector. It provides fully calibrated digital output signals for both VOC (in ppm TVOC) and NOx (in ppb) concentrations, which can be read directly using available libraries for Arduino, Python, and other platforms.

While its primary design is for indoor air quality monitoring, its wide operating temperature range (-40°C to +85°C) and robust MOx sensing element make it suitable for controlled industrial indoor applications and some outdoor monitoring setups, provided it is housed appropriately to protect against direct water ingress and particulate contamination.

The SGP41 sensor requires a brief initial conditioning period after power-on for optimal stability. The integrated CMOSens® technology handles on-chip signal processing and provides factory-calibrated outputs, so no user calibration is typically required for basic applications, though baseline adjustments can improve long-term accuracy.