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Description: The SHT15 Breakout is an easy to use, highly accurate, digital temperature and humidity sensor. This board has been fully calibrated and offers high precision and excellent long-term stability at low cost. The digital CMOSens® technology integrates two sensors and readout circuitry on one single chip. All you need is two lines for 2-wire communication, and you’ll have relative humidity and temperature readings to help you sense the world around you!

The two sensors built into the SHT15 have been seamlessly coupled to a 14bit analog to digital converter and a serial interface circuit resulting in superior signal quality, fast response time, and a strong resistance to external disturbances. Additionally, the on board SHT15 features a 0-100% RH measurement range with a temperature accuracy of +/- 0.3°C @ 25°C. There are only four pins that need to be hooked up in order to start using this sensor in a project. One for VCC, one for GND, and the two data lines SDA and SCL.


  • Operating Voltages: 2.4V min - 5.5V max
  • 2 factory calibrated sensors for relative humidity & temperature
  • Digital 2-wire interface (Not I2C, but similar)
  • Measurement range: 0-100% RH
  • Absolute RH accuracy: +/- 2% RH (10…90% RH)
  • Repeatability RH: +/- 0.1% RH
  • Temp. accuracy: +/- 0.3°C @ 25°C
  • Precise dewpoint calculation possible
  • Fast response time
  • Low power consumption (typ. 30 µW)


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Customer Comments

  • The “L” shaped channels reduce heat transfer according to the datasheet. Not sure where the heat is coming from on the breakout boards, though. I believe that it lowers the thermal inertia for the sensor which may make it a little more responsive to temperature changes.

  • Is the purpose of the two ‘L’ shaped channels so the board can be cut to reduce size? Or am I about to destroy my breakout?

    • lol, I suppose you could make it smaller if you wanted. The purpose of the milled-out L shapes is to help with parasitic heat from a system. If you had this sensor soldered to a board that ran warmer than the environment you’re trying to measure, it will give you inaccurate data. Not having a copper pour and reducing the surface area of the PCB helps to keep the readings from the sensor closer to accurate.

  • Looks awesome and I’m sure it runs great. However my dyslexic mind keeps seeing the model number as a word that is synonymous with the stuff a dog would leave on your lawn. Consider putting a dash “-” between the letters and numbers of the model number.

    • ;) SHT15 is the part number for the chip - SparkFun didn’t pick it. (Well, they picked the part for this BOB, but they didn’t pick the name/number for the part).

  • This appears to have a response time of 8 seconds, but a read delay of 320ms at full resolution, so I am guessing response time is the lag between actual temperature change and measured temperature change, but update polling can be about 3 times a second.

    • I agree with your concussion that the 8 Second Response Time is the time the sensors take to respond to an increase or decrease in the temperature or humidity.

      Per the docs, “… SHT1x should not be active for more than 10% of the time – e.g. maximum one measurement per second at 12 Bit accuracy shall be made …”

      So if the SHT15 takes 320 milliseconds to process a 14 bit measurement then you “should not” poll more than ONCE every 3 seconds to maintain 10% On-Time and 90% Off-Time requirement. Do not POLL 3 times per second.

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Related Tutorials

SHT15 Humidity and Temperature Sensor Hookup Guide

September 17, 2015

The SHT15 Humidity and Temperature sensor is an easy to use, digital, temperature and humidity sensor all in one tiny package.