humidity sensor HTU20P by AMSYS

humidity / temperature sensor HTU20P

humidity sensor HTU20PF by AMSYS

humidity / temperature sensor HTU20PF (with PTFE filter membrane)

HTU20P and HTU20P(F)

The HTU20P OEM sensor is a combination of capacitive humidity sensing element and temperature sensor. Each sensor is individually calibrated, compensated for and tested.

The output signal is a 120-Hz PWM signal which enables an analog DC output signal to be generated through a suitable lowpass filter.

The sensor has a wide measurement range for relative humidity of between 0 and 100% RH. The accuracy varies from ±3% between 20 and 80% RH (@ 25°C) to up to 7% in the extended range. Temperature is detected with an accuracy of ±0.3°C (@ 25°C) within a spectrum of -40 to +125°C. The resolution for relative humidity and for temperature is 10 and 12 bits respectively.

Following full saturation the HTU20P is again operational after approximately 10 seconds.

The sensor is supplied in a (reflow) solderable 3 x 3 x 0.9 mm3 DFN chip package (dual-flat no-lead), making it suitable for sensor systems with a small footprint.

Variants of the HTU20P

The HTU20P is also available as the optional HTU20P(F) with a PTFE filter membrane to protect it from dust, liquid and contamination.
Pre-assembled sensors on circuit boards in the digital HTU21D series – the PHTU21D – are also available which can be used as development modules for the OEM humidity sensors.
Analog humidity sensor HTU(F)353X  or the digital HTU(F)383X version are also provided as ready-to-use humidity sensor modules based on the HTU.


  • Humidity range of 0 to 100% RH
  • Temperature range of -40 to +125°C
  • Analog PWM output signal
  • Accuracy of ±3% RH
  • Supply voltage of 1.5 to 3.6 V
  • Short signal times
  • Fast recovery time after long saturation periods
  • Small DFN package
  • RoHS and REACH compliant


  • Car cabins
  • Household appliances
  • Medical equipment
  • Printers and copiers
  • Humidifiers/dehydrators and driers
  • Air conditioning systems
  • Weather stations
  • Security systems

For information on prices and delivery times or if you have any technical questions, please contact