User manual

AHHYTM_E2.2.1
7/23
Application Note
Humidity Module
HYT
2. HYT 221
The round stainless steel casing can easily be tted into
housing openings and can be sealed against the wall
with the use of an O-ring. Combined with the waterproof
metal lter, it results into an assembly that is splash
water proof and enables a sealed housing construction
while providing a high dynamic responsiveness. Precisely
calibrated, the HYT 221 delivers an accuracy of ±1.8
% RH and ±0.2 °C. Like all representatives of the HYT
family, the sensor combines the advantages of a precise,
capacitive polymer humidity sensor with the high
integration density and functionality of an ASIC. The
signal processing integrated in the sensor completely
processes the measured data and directly delivers the
physical parameters of relative humidity and temperature
over the I
2
C compatible interface as digital values. The
module is precisely calibrated by the manufacturer and is
therefore fully interchangeable without adjustment.
Both the linearity error as well as the temperature drift are
corrected “OnChip” through computation resulting in an
outstanding accuracy over a wide range of applications.
Due to mechanical robustness, high chemical stability,
dew formation resistance as well as excellent long term
stability, the typical areas of application are humidity
measurement in saunas, applications in outdoor areas or
industrial applications in the eld of drying systems.
Typical Areas of Application:
▪ Meteorology
▪ Industrial drying systems
▪ Medical devices
▪ Agriculture