Following the successful market launch
of the SHT2x family of humidity and temperature sensors, Sensirion is
now launching a sensor designed exclusively for temperature measurement.
The STS21 temperature sensor is based on the same chip as the SHT2x
family and is housed in a tiny DFN package measuring only 3x3mm.
This makes the sensor suitable for use in applications where only
very limited space is available. It also delivers outstanding
performance and remarkably high accuracy of ±0.22 °Cover the
temperature range of 5 to 60°C, combined with very low power
The STS21 is pin and protocol compatible with Sensirion's standard
SHT21 humidity sensor, but it has a different I2C address. This allows
the STS21 to be used as an alternative to the SHT21 in applications
where temperature measurement is required and humidity measurement is
optional, since the same hardware can be used with both sensors. The
STS21 temperature sensor is fully calibrated, provides a digital output,
and is very competitively priced. It therefore fulfills the stringent
requirements of many applications in terms of both performance and cost
The quality sensirion delivers is hard to see in other manufacturers. Accuracy, time dynamics, and convenience of measurement retrieval i found hard to match. I have been long using the SHT2x series and, though realtively expensive, they are extremely useful when cost is not the first concern.
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