DFRobot - I2C Temperature & Humidity Sensor (Stainless Steel Shell)

This I2C digital temperature & humidity sensor and features a user-programmable humidity & temperature alarm function.

Its housing is made of 304 stainless steel to ensure good impact resistance, heat resistance, low temperature, and chemical resistance. The sensor output is designed as DuPont 2.54 connector for easy wiring. Also, there are two built-in 4.7K pull-up resistors and one 100nF filtering capacitor so the sensor can be directly used with microcontrollers like Arduino.

This temperature & humidity sensor can be applied to electronic, medical, automotive, industrial, weather, and other fields, including home appliances like HVAC, dehumidifiers and refrigerators, testing & inspection equipment, and other relevant temperature & humidity measurements and controls.

Pinout

Version updates (10/7/2025):

We are excited to announce a significant performance upgrade for I2C digital temperature & humidity sensor. The latest version now integrates a new-generation chip, delivering a major improvement in measurement accuracy.

Key Improvements:

This upgrade provides up to double the precision for humidity readings and a five-fold improvement in temperature accuracy.

Identifying Your Sensor Version:

To ensure you use the correct documentation and tutorials, you can easily identify your sensor version by its wire color:

New Version (CHT832X): The SCL wire is Green.

Previous Version (CHT8305): The SCL wire is White.

• Smart HVAC System
• Washer & dryer
• Refrigerator & freezer
• Cold Chain asset tracking & data logger
• Environment Monitor
• Portable/Wearable Weather Monitor
• IP Camera

• Operating Voltage: 1.8V~5.5V
• Average Operating Current: 5.5uA (Typ.)@3.3V,1Con/s for Both temperature and humidity Conversion
• Standby Current: 0.36uA (Typ.)
• Temperature Accuracy with calibration:
           ±0.1℃(Typ.), ±0.3℃(Max.) from 10℃ to 50℃
           ±0.2℃(Typ.), ±0.6℃(Max.) from 0℃ to 85℃
           ±0.5℃(Typ.), ±1.0℃(Max.) from -40℃ to 125℃
• Humidity Accuracy with calibration
           ±1.5%RH@20%RH~80％RH
• Digital Interface compatible with SMB us and I2C,support:
           Packet Error Checking feature to improve communication
           Reliability and robustness
           Speed up to 1.0MHz
           SMB us General Call
• Supports One-shot or continuous measurement
• NIST traceability
• Temperature Range: -40℃ to 125℃
• Humidity Range: 0%RH~100%RH

• I2C Temperature & Humidity Sensor (Stainless Steel Shell) x1