Sensirion — Digital Humidity Sensor SHTC3

March 3, 2020
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The easiest and most efficient way to humidity sensing

Best-in-class products, unsurpassed experience and excellent application support make Sensirion the world’s leading manufacturer of digital humidity and temperature sensors defining the industry standard. With the SHTxx series, Sensirion as a pioneer of digital humidity sensors defined an industry standard more than 15 years ago.

The SHTC3 humidity and temperature sensor can be used in a wide range of applications with standard requirements and is especially suited for consumer electronics. Its highly attractive performance-price ratio makes the SHTC3 ideal for high-volume applications. The small 2 x 2 x 0.75 mm3 DFN package enables applications in even the most limited space. The sensor covers a humidity measurement range of 0 to 100% RH and a temperature measurement range of -40°C to 125°C with a typical accuracy of ±2% RH and ±0.2°C. The broad supply voltage of 1.62 V to 3.6 V and an energy budget below 1 μJ per measurement make the SHTC3 perfectly suited to mobile or wireless applications powered by battery. The digital I2C interface and factory calibration enables easy integration.

Key Features – Customer Benefits

  • The voltage range of 1.62-3.6V enables cost-effective designs for battery-driven applications (no voltage regulator needed)
  • Thanks to its small size, the DFN package enables applications in even the most limited spaces.
  • The low power mode with an energy budget below 1 uJ enables longer battery-lifetime in battery-driven applications.
  • Thanks to its highly attractive price-performance ratio the SHTC3 is the ideal solution for applications with basic requirements.


  • Smart Thermostats
  • IP Cameras
  • Indoor Air Quality (IAQ) monitors
  • Weather stations
  • Food Transportation
  • Cold Chain

CMOSens® - Core of Sensirion's Sensor Solutions

Sensirion sensor products guarantee outstanding performance and correspondingly high customer utility. They are all based on our innovative CMOSens® Technology, which enables the sensor component to be combined with the analog and digital signal processing circuitry on a tiny CMOS silicon chip. This is implemented in advanced semiconductor technology, using specific microsystem processing steps to produce the microsensor structures on specially developed and patented semiconductor parts. The resulting sensor chips enable precise and reliable sensing of the desired physical parameters, such as relative humidity, temperature, or mass flow. CMOSens® accordingly represents a guarantee of high precision, reliability, and functionality combined with cost effectiveness.

Capacitive humidity sensor principle

In addition to the resistive method, the capacitive measurement principle, above all, established and proved itself as a standard in the past. For this principle, the sensor element is built out of a capacitor. The dielectric is a polymer which absorbs or releases water proportional to the relative environmental humidity, and thus changes the capacitance of the capacitor. This change in capacitance can be measured by an electronic circuit. This allows the relative air humidity to be determined. For humidity sensors with CMOSens® technology, a "micro-machined" finger electrode system with different protective and polymer cover layers forms the capacitance for the sensor chip, and, in addition to providing the sensor property, simultaneously protects the sensor from interference in ways previously not achieved.

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