humidity sensor PHTU21D on PCB for quick and easy use
The digital PHTU21D consists of an OEM humidity and temperature sensor (HTU21D) mounted on a circuit board with four pin connectors. Each sensor is individually calibrated, compensated for and tested.
This enables humidity to be measured within a range of 0 to 100% RH. The sensor is designed for an extended temperature range of -40 to +125°C which can be measured with great accuracy thanks to the integrated temperature sensor.
The outputs for humidity and temperature in I²C format are suitable for further data processing using simple, inexpensive microcontrollers. The resolution of the HTU21D can be programmed (8/12 bits to 12/14 bits RH/T). As the sensor has a low power consumption it is suitable for battery operation. For such applications the current battery level can be displayed for monitoring purposes.
Secure data transmission is ensured by a CRC or cyclic redundancy check. Humidity and temperature signal response times and the recovery time (following full saturation) are within a range of a few seconds. The special electrical ID code can be read out by an I²C bus besides the printed code, making the device fully trackable.
Features
- Humidity range of 0 to 100% RH
- Temperature range of -40 to +125°C
- Digital I²C interface
- Accuracy of ±2% RH
- Supply voltage of 1.5 to 3.6 V
- Short signal times
- Settable resolution
- Fast recovery time after saturation
- Electrical ID code
- Low power dissipation of 2.7 μW
- Small DFN package
- RoHS and REACH compliant
Applications
- Car cabins
- Household appliances
- Medical equipment
- Printers and copiers
- Humidifiers/dehydrators and driers
- Building facilities
- Weather stations
- Security systems
- Multimedia devices (smartphones, tablets)
Download
- HTU21D OEM humidity sensor datasheet
- Software driver fan002 (zip format): Easy interface to the sensor through four public functions (Mail request) (written for the dsPIC33 microcontroller family)
- Application note fan001: HTU2X serial number reading
- Application note fan004: HTU21D – humidity and temperature sensor – assembly and applications
For information on prices and delivery times or if you have any technical questions, please contact info@amsys-sensor.com.