The HD 100 uses a capacitive sensing element to make relative humidity measurements. A capacitive polymer layer inside the probe reacts with humidity which occurs between 2 metal layers that cover a glass substract. Water absorption, which is a function of (RH) relative humidity in the immediate environment changes the dielectric constant. The signal measured is directly proportionnal with relative humidity & is dependent on atmospheric pressure.
HD 100 Thermo-hygrometers Specifications
Units
Ranges
Accuracy
Resolutions
HUMIDITE RELATIVE
%RH
from 5 - 95 percent RH
(hysteresis, linearity, repeatability) : ±1.8 percent RH (15 - 25 deg. C) Factory calibration incertainty : ±0.88 percent RH Temperature dependence : ±0.04 x (T-20) percent RH (if T < 15 or T > 25 deg. C)
.1 %RH
DEW POINT
deg. C td, deg. F td
from -40 - +70 deg. Ctd
±0.8 percent of rdg ±0.6°Ctd
.1 deg. Ctd
AMBIENT TEMPERATURE
deg. C, deg. F
from -20 - +70 deg. C
±0.4 percent of rdg ±0.3°C
.1 deg. C
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