7Semi SHT45 and SGP41 Environmental Sensor Breakout

The 7Semi SHT45 and SGP41 Environmental Sensor Breakout is a compact dual-sensor module that integrates high-precision temperature and humidity sensing (SHT45) with advanced air-quality sensing (SGP41). This combined board provides accurate environmental data along with VOC and NOx gas indices, making it suitable for indoor air-quality monitoring, HVAC automation, IoT devices, and smart-environment applications. With an I²C digital interface, it allows easy integration with microcontrollers and embedded systems.

Technical Specifications:

SHT45 - Temperature & Humidity Sensor:

• Measurement Parameters: Temperature and Relative Humidity
  
• Temperature Accuracy: ±0.1°C
  
• Humidity Accuracy: ±1.0% RH
  
• Interface: I²C
  
• Output: Fully calibrated digital output

SGP41 - VOC & NOx Gas Sensor:

• Measurement Parameters: VOC Index and NOx Index
  
• Gas Type: Detects volatile organic compounds and oxidizing gases
  
• Output: Raw VOC and raw NOx signals for air-quality algorithms
  
• Interface: I²C
  
• Sensor Type: MOX (Metal-Oxide) gas sensor

Module / General:

• Combined environmental and air-quality monitoring module
  
• Shared I²C bus for both sensors
  
• Supply Voltage: 3.3V
  
• Logic Compatibility: 3.3V systems
  
• Compact breakout suitable for embedded designs

Features:

• Dual-sensor integration: temperature, humidity, VOC, and NOx sensing in one module
  
• High accuracy environmental sensing via SHT45 (±0.1°C and ±1.0% RH)
  
• SGP41 provides real-time VOC and NOx indices for indoor air-quality analysis
  
• Fully digital I²C interface for simple connection and coding
  
• Low power consumption suitable for battery-powered IoT systems
  
• Factory-calibrated sensing outputs ensure high reliability
  
• Compact design reduces PCB footprint compared to separate sensors
  
• Ideal for indoor air-quality monitoring and HVAC optimization
  
• Easy integration with Arduino, ESP32, STM32, Raspberry Pi, and IoT platforms
  
• Suitable for long-term environmental logging and automation systems

Applications:

• Indoor air-quality monitoring
  
• Smart home and IoT environmental sensors
  
• HVAC and ventilation control systems
  
• Environmental data logging platforms
  
• Smart-building automation
  
• Air purifiers and filtration systems
  
• Industrial and laboratory environmental monitoring
  
• Consumer indoor climate devices
  
• Greenhouse and confined-space monitoring
  
• Workplace air-quality detection