7Semi SHT40 SGP40 VOC Air Quality Sensor Breakout Qwiic Compatible

The 7Semi SHT40 SGP40 VOC Air Quality Sensor Breakout is a compact environmental sensing board combining the SHT40 temperature and humidity sensor with the SGP40 VOC gas sensor. It provides accurate ambient measurements while monitoring indoor air quality through VOC indexing. The breakout board communicates via I²C and includes a Qwiic/STEMMA QT compatible connector for simple plug-and-play integration with development boards and microcontrollers, making it ideal for smart-home, IoT, and environmental monitoring projects.

TECHNICAL SPECIFICATION

• Interface: I²C digital interface
• Logic Compatibility: 3.3 V and 5 V compatible
• Temperature Measurement Range: –40 °C to +125 °C
• Temperature Accuracy: ±0.2 °C typical
• Humidity Range: 0% to 100% RH
• Humidity Accuracy: ±1.8% RH typical
• VOC Sensor Type: SGP40 based volatile organic compound sensing
• VOC Response Time: <10 seconds (typical)
• Output: VOC Index for air-quality representation
• Active Current Consumption: Approximately 2.6 to 3.5 mA
• Humidity Response Time: Around 6 seconds (63% change)
• Operating Humidity: 0–100% RH
• Connector: Qwiic/STEMMA QT and standard header pads

Features:

• Dual environmental sensor board capturing temperature, humidity and VOC air quality levels
• Plug-and-play Qwiic/STEMMA QT connector for easy wiring and daisy-chain expansion
• High precision ambient measurement ideal for indoor comfort and environment tracking
• Low power consumption suitable for portable and IoT applications
• Compatible with most microcontroller platforms via I²C
• Breadboard-friendly breakout design
• Ideal for long-term indoor monitoring systems
• Compact solution combining two high-quality sensors in one module

Applications:

• Indoor air-quality tracking and environmental monitoring
• Smart home automation and HVAC optimization
• IoT sensing nodes and telemetry systems
• Wearable and portable environmental devices
• Data logging and real-time indoor comfort monitoring
• Air-purifier or ventilation control feedback
• Educational and prototype environmental sensing projects