Based on a unique capacitive cell, these relative humidity sensors are designed for high volume, cost sensitive applications such as office automation, automotive cabin air control, home appliances, and industrial process control systems. They are also useful in all applications where humidity compensation is needed.
Lead free component
High reliability and long term stability
Patented solid polymer structure
Suitable for linear voltage or frequency output circuitry
Fast response time and very low temperature coefficient
ELECTRICAL CHARACTERISTICS OF HUMIDITY SENSOR
(Ta=25ºC, measurement frequency @10kHz / 1V unless otherwise noted)
Characteristics
Symbol
Min
Typ
Max
Unit
Humidity Measuring Range
RH
1
99
%RH
Supply Voltage
Vs
10
V
Nominal capacitance @55%RH
C
177
180
183
pF
Temperature coefficient
Tcc
0.01
pF/°C
Average Sensitivity from 33% to 75%RH
ΔC/%RH
0.31
pF/%RH
Leakage Current (Vcc=5V)
I
1
nA
Recovery time after 150 hours of condensation
tr
10
s
Humidity Hysteresis
/-1
%RH
Long term stability
T
/-0.5
%RH/yr
Time Constant (at 63% of signal still air) 33%RH to 80%RH
ta
3
5
s
Deviation to typical response curve (10% RH to 90%RH)
