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Back to catalog

STS40

±0.2°C Ultra-low-power temperature sensor

The STS4x is Sensirion’s state-of-the-art, highly accurate digital temperature sensor series, boasting industry-leading lead times. It is a fully digital, highly cost-efficient temperature sensor platform that is available in different accuracy classes, currently represented by the STS40. The STS4x temperature sensor range features enhanced signal processing, three distinctive I²C addresses and communication speeds of up to 1 MHz. Moreover, the dual-flat no-leads (DFN) package has a footprint of only 1.5 × 1.5 mm² while retaining a height of 0.5 mm, which allows for an easy integration of the STS4x series into various applications. Additionally, the wide supply voltage range of 1.08 to 3.6 V and low current consumption of 0.4 µA for a typical average current at 1 measurement per second enables battery-driven designs. Taken together, the STS4x series achieves the greatest cost efficiency among comparable sensors on the market. Thanks to Sensirion’s CMOSens® Technology, the STS4x temperature sensor benefits from the high-tech engineering of a wide range of sensor components. It is designed for mass production, comes with a high signal-to-noise ratio and high process capability and is proven to be highly reliable and stable over the long term.

Distributor listContact sales

Specification

Temperature
Typ. temperature accuracy0.2°C0.2°C
Operating temperature range [°C]-40 - 125°C-40 - 125°C
Response time (τ63%)2s2s
Generic
Supply voltage1.08 - 3.6V1.08 - 3.6V
Average supply current0.4uA0.4uA
InterfacesI²CI²C
Size (LxWxH)1.5 x 1.5 x 0.55mm1.5 x 1.5 x 0.55mm
Packaging size10000pcs (T&R)10000pcs (T&R)

Downloads

Handling instructions STS
  • 06/2025•
  • PDF•
  • 158.0 KB
Application note06/2025PDF158.0 KB
Datasheet STS4x
  • 02/2025•
  • PDF•
  • 570.7 KB
Datasheet02/2025PDF570.7 KB
Design-in guide SHT/STS
  • 04/2024•
  • PDF•
  • 822.1 KB
Guide04/2024PDF822.1 KB
Design-in guide SHT/STS Chinese
  • 06/2024•
  • PDF•
  • 1.2 MB
Guide06/2024PDF1.2 MB
Arduino driver I2C STS4x
  • Link•
SoftwareLink
Embedded drivers temperature
  • Link•
SoftwareLink
Calibration certification SHT/STS
  • 08/2021•
  • PDF•
  • 110.4 KB
Certificate08/2021PDF110.4 KB
REACH and RoHS declaration SHT/STS
  • 04/2026•
  • PDF•
  • 107.3 KB
Certificate04/2026PDF107.3 KB
Temperature brochure Japanese
  • 05/2025•
  • PDF•
  • 1.4 MB
Flyer05/2025PDF1.4 MB
Temperature product flyer
  • 10/2024•
  • PDF•
  • 1.1 MB
Flyer10/2024PDF1.1 MB
Temperature product flyer Chinese
  • 03/2025•
  • PDF•
  • 1.2 MB
Flyer03/2025PDF1.2 MB

Smart sensors for your application

Sensirion's sensor solutions are used in a wide range of applications and markets. Our reliable environmental and flow sensors improve energy efficiency, increase health and ensure safety and comfort.

  • All products
  • •Temperature sensors
  • •STS4x

Sensor evaluation

Buy the following products to evaluate this sensor

NameDescriptionSeriesCategory
SEK-SensorBridgeConnecting bridge with two sensor portsSEK-SensorBridge
SEK-STS40-CD1BTemperature evaluation kit STS40SEK-STS4xTemperature sensors

SEK-SensorBridge

Connecting bridge with two sensor ports

SEK-SensorBridge

SEK-STS40-CD1B

Temperature evaluation kit STS40

SEK-STS4x

Temperature sensors

Download the respective viewer software to start measuring

Go to download center

Start testing our sensors fast and easy with the evaluation kits

How to get started
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