Humidity sensors are used to
measure the humidity in air, as a fraction
of the maximum amount of water that can be
absorbed by air at a certain temperature.
Under normal atmospheric conditions and a
given temperature this fraction can vary between
0 ( absolute dry point ) and 100 (Condensation
starting point ). This relative humidity measurement
is only valid under the above mentioned temperature
and atmospheric conditions, thus making very
important the fact that the sensor must not
be affected by temperature or pressure changes.
As a result it is obvious that Temperature
or Pressure Dependent sensing elements, such
as Mechanical Devices and Resistive type Sensors,
are far behind of the respective non-dependent
ones, such as Capacitance sensors. Absorption
based humidity sensors provide both temperature
and %RH (Relative Humidity) outputs.
Humidity Cells are mainly
Capacitance sensors characterized of an
excellent long term stability, good resistance
to pollutants, precise measurments, high
sensitivity, intergangeability and wettability.
- Drying Processes
- Battery-powered systems
- OEM assemblies