Servoflo Corporation’s HYT271 digital humidity element is a capacitive polymer sensor with an I2C interface and an optimized thin film sensor connected to an ASIC, both on the same substrate.
With a humidity measurement range from 0% to 100% rh, the HYT271 has an extremely low hysteresis of less than plus or minus 1% rh with an overall measurement accuracy of plus or minus 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 2.7 V to 5.5 V with an optional low voltage model utilizing 1.8 V to 3.3 V. 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.
-- Servoflo Corporation
October 27, 2010