Digital Humidity Sensor Element features I2C interface.

Press Release Summary:

Using thin film sensor connected to ASIC, Model HYT271 measures humidity from 0-100% RH with hysteresis less than ±1% RH and overall accuracy of ±2.8% RH. Linearity is less than 1% RH, while resolution is 0.02% RH. Using I2C interface, Model HYT271 can communicate with up to 126 sensors simultaneously. Linearity and temperature drift are factory calibrated, eliminating need for field adjustment. Operating from 2.7-5.5 V supply, capacitive polymer sensor resists dew and chemical exposure.

Original Press Release:

I2C Digital Humidity Element Has Excellent Accuracy and Low Hysteresis

Servoflo Corporation of Lexington, Massachusetts is pleased to announce the HYT271 digital humidity element. This capacitive polymer sensor has an I2C interface and uses an optimized thin film sensor connected to an ASIC, both on the same substrate.
With a humidity measurement range from 0-100% rH, the HYT271 has an extremely low hysteresis of less than ±1% rH with an overall measurement accuracy of ±2.8% rH for the HYT271-S model. The linearity is less than 1% rH while the resolution is 0.02% rH. A temperature measurement is also included from -40°C to +125°C with an accuracy of 0.3°C and resolution of 0.015°C. Standard voltage supply is 2.7V to 5.5V with an optional low voltage model utilizing 1.8V to 3.3V. The HYT271 has a standard SIL connection with surface mount packaging available upon request.

Advantages of the HYT271 include the ability to communicate with as many as 126 sensors at the same time over the I2C interface. Linearity and temperature drift are factory calibrated eliminating the need for field adjustment. The high performance polymer provides excellent stability and strong resistance to dew formation and chemical exposure. Typical applications include HVAC, consumer products, white goods, instrumentation, medical, automotive, and much more.

Samples are available for approximately $21 each while pricing for ordering quantities of 1000 are $12.25. Complete specifications can be found at
Servoflo is a provider of pressure sensors, humidity sensors, and sensor signal conditioners for the automotive, medical, process control, and other industrial applications. For information on all of Servoflo¡¦s product offerings, please visit

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