Want to build an air quality monitor that does more than simply measure temperature and humidity? The 7Semi SHT45 + SGP41 Environmental Sensor Breakout combines two of Sensirion's most advanced environmental sensors onto a single compact board, giving you access to highly accurate temperature, humidity, VOC, and NOx measurements through a simple I²C interface.
At the heart of the board is the SHT45, one of Sensirion's highest-performance temperature and humidity sensors, capable of delivering laboratory-grade environmental measurements with excellent long-term stability. Alongside it sits the SGP41 gas sensor, designed to detect volatile organic compounds (VOCs) and nitrogen oxides (NOx) commonly found in indoor environments. Together, they create a powerful environmental sensing platform capable of monitoring comfort, air quality, and pollution levels in real time.
What makes this combination particularly powerful is that the SGP41 uses temperature and humidity data from the SHT45 to automatically compensate its gas measurements. This improves measurement accuracy and helps deliver more meaningful VOC and NOx readings under changing environmental conditions. Whether you're designing a smart home device, HVAC controller, air purifier, environmental data logger, or an IoT monitoring system, this breakout provides everything needed to start building professional-grade air quality solutions.
Features
• Combines the Sensirion SHT45 and SGP41 on a single compact breakout board for complete environmental monitoring.
• Measures temperature and relative humidity with excellent accuracy and long-term stability using the SHT45 sensor.
• Detects volatile organic compounds (VOC) and nitrogen oxides (NOx) to help monitor indoor air quality and pollution levels.
• Uses real-time humidity and temperature compensation to improve gas sensing performance and measurement consistency.
• Communicates through a standard I²C interface, making integration simple with Arduino, ESP32, STM32, Raspberry Pi, RP2040, and other development platforms.
• Includes STEMMA QT / Qwiic compatible connectors for quick plug-and-play prototyping without soldering.
Package Includes
- 1 × 7Semi SHT45 + SGP41 Environmental Sensor Breakout
- 1 × Header Pin Strip
SGP41 Adafruit library and sample example
- Category of product:
- Enviroment sensor breakout
- Operational voltage:
- 3.3V
- Operational temprature:
- -40C TO 80C
- Communication interface:
- I2C
- Dimension in mm:
- L=25mm W=18mm H=4.72mm
- _3d_glb:
- https://7Semi.com/content/3d-files/10191.glb
- Temperature Accuracy:
- ±0.1°C Typical
- Humidity Accuracy:
- 1%RH Typical
- Gas Sensing:
- VOC + NOx
- Air Quality Output:
- VOC Index + NOx Index
