SHT31 Temperature & Humidity Sensor Module

Temperature and Humidity Sensor Module I2C

Overview

A high‑precision, digital temperature and humidity sensor module utilizing the Sensirion SHT31 chip, easily interfaced over I²C. Compatible with both 3.3 V and 5 V systems, it features dual I²C addresses, built‑in pull‑ups, address select, and alert/reset pins.

Technical Specifications

• Sensor IC: Sensirion SHT31 (CMOSens® technology)
• Temperature Accuracy: ±0.3 °C (typical)
• Humidity Accuracy: ±2 %RH (0–100 %RH)
• Temperature Range: –40 °C to +125 °C (sensor IC), module recommended ≤80 °C
• Humidity Range: 0 % to 100 % RH
• Response Time: τ₆₃% ≈ 8 s for humidity, > 2 s for temperature
• Supply Voltage: 2.4–5.5 V DC (works with 3.3 V or 5 V logic)
• Supply Current: Typically <1.5 mA
• I²C Interface: Up to 1 MHz, default address 0x44, selectable 0x45 
  
• Module Size: ~17 × 12 mm
• Weight: approx. 0.8 g 

This sensor has 4 pins:

• VCC: Module power supply –2.4-5 V
• GND: Ground
• SDA: I2C data
• SCL: I2C clock

Features & Benefits

• High accuracy & stability with factory calibration, linearization, and digital compensation
• Wide voltage compatibility eliminates need for level shifting
• Fast response times suitable for real-time environmental sensing
• Dual I²C addresses allow chaining multiple modules on one bus
• Alert/Interrupt pin support enables threshold-triggered events
• Compact breakout includes pull-ups and header-ready pads for easy installation

Applications

• Weather monitoring & meteorological stations
• HVAC systems and indoor climate control
• Smart agriculture and greenhouse control
• Home automation and environmental sensing
• Industrial process and data logging

Download:

• Arduino Example