Sensirion’s new Humidity and Temperature Sensor SHT40

Written by Mike Benson

October 22, 2020

The 4th Generation of Best-in-Class Humidity Sensing

In line with Sensirion’s industry-proven humidity and temperature sensors, the SHT40 offers the best price-performance ratio. Tape and reel packaging combined with suitability for standard SMD assembly processes make the SHT40 ideal for high-volume applications.

The SHT40 builds on a completely new and optimized CMOSens® chip offering reduced power consumption and improved accuracy specifications. With the extended supply voltage domain from 1.08 V to 3.6 V mobile and battery-driven applications are the perfect fit. The super small-size realized in a robust DFN housing allows for integration in challenging designs while securing highest reliability demands as demonstrated by the JEDEC JESD47 qualification.


  • Relative humidity accuracy: ±1.8 %RH
  • Temperature accuracy: ±0.2 °C
  • Supply voltage: 1.08 V to 3.6 V
  • Average current: 0.4 µA (at meas. rate 1 Hz)
  • Idle current: 80 nA
  • I2C fast mode plus
  • Operating range: 0 to 100 %RH, -40to 125 °C
  • Fully functional in condensing environment
  • Variable power heater
  • NIST traceability
  • JEDEC qualification


  • Consumer electronics
    • Air Quality Monitors (see 40to60RH petition)
    • Smart Speakers / Thermostats
    • Dataloggers
    • Smoke Detectors
  • Medical Devices
  • Inkjet and Laser Printers

Core values

  • Pioneering humidity and temperature sensors since more than 20 years
  • Proven track record: 4th generation of humidity sensors
  • Highest reliability, robustness and accuracy
  • Highest quality requirements according to JEDEC JESD47

Technology and benefits



Supply voltage: 1.08 V … 3.6 V

Perfectly suited for mobile and battery-driven applications

Relative humidity accuracy: ±1.8 %RH
Temperature accuracy: ±0.2 °C

Unrivalled accuracy tolerances, minimal device-to-device (D2D) variations

I2C fast mode plus

Fastest data transfer

Variable power heater

Enabling new applications in extreme operating conditions

New MEMS sensor element

Fully functional in condensing environment

Average current: 0.4 µA (at meas. rate 1 Hz)

Enhancing battery-lifetime in mobile applications

Interested? Email us at

Information extracted from (link)

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