7Semi SHT45 Temperature and Humidity Sensor Breakout with Qwiic Connector

The 7Semi SHT45 Tiny Temperature and Humidity Sensor Board with Qwiic Connector is a compact, high-accuracy environmental sensing module designed for precise temperature and relative humidity monitoring. Featuring the Sensirion SHT45 sensor, it delivers 16-bit digital measurements through an I2C interface.

The sensor provides +/-0.1 deg C typical temperature accuracy and +/-1.0% RH typical humidity accuracy. It supports temperature measurements from -40 to +125 deg C and relative humidity measurements from 0 to 100% RH, making it suitable for environmental monitoring, smart home automation, HVAC systems, and IoT applications.

The board operates from a nominal 3.3V supply and features a 4-pin Qwiic connector with 1.00mm pitch for easy integration with compatible development boards. Its narrow-neck PCB design helps reduce thermal interference from connected electronics, improving measurement reliability.

With ultra-low power consumption, a fixed I2C address of 0x44, and an integrated heater with three selectable power levels, the module is suitable for compact, portable, and battery-powered sensing applications.

Key Features

• High-Accuracy Temperature Measurement: Provides +/-0.1 deg C typical temperature accuracy for precise environmental monitoring.

• High-Accuracy Humidity Measurement: Offers +/-1.0% RH typical accuracy for reliable relative humidity sensing.

• Wide Measurement Range: Supports temperature measurements from -40 to +125 deg C and relative humidity measurements from 0 to 100% RH.

• 16-Bit Digital Output: Provides temperature and humidity measurements through an I2C interface.

• Ultra-Low Power Consumption: Supports an average sensor current of 0.4 uA typical at 1 measurement per second in low-repeatability mode with the heater disabled.

• Qwiic Connector Interface: Features a 4-pin, 1.0mm pitch Qwiic connector for easy connection to compatible development boards without soldering.

• I2C Communication Interface: Uses a fixed 7-bit I2C address of 0x44 for communication with compatible microcontrollers.

• Integrated Sensor Heater: Features three selectable heating power levels (Low, Medium, High) for sensor recovery in challenging humidity conditions.

• Compact Tiny Board Design: Features a narrow-neck PCB layout that helps minimize heat transfer to the sensing element.

• 3.3V Operation: Designed for a nominal 3.3V power supply.

• Reliable Digital Communication: Supports CRC-8 checksum verification for measurement data.

• Versatile Applications: Suitable for IoT devices, HVAC systems, environmental monitoring, smart home automation, and portable instruments.

Product includes

• 1 x 7Semi SHT45 Temperature and Humidity Sensor Breakout with Qwiic Connector