The DewPro® Trace Moisture Line
of compact transmitters offers accurate, reliable measurement
of the moisture content of gases and liquids. The HygroTwin™,
Hygrotec™ and HygroGuard™ Series consist of
separate probes and transmitters. Both DewPro and HygroTwin/Hygrotec/HygroGuard
instruments provide convenience and versatility for dryer
manufacturers and users, gas analysis in semiconductor manufacturing,
chemical and petrochemical processing, compressed gas bottling
and usage, and other process control applications where
the accurate monitoring of trace moisture is crucial.
When Water is the Critical Factor
Water can be a contaminant in blanket gases, feed stocks,
and other process gases or liquids. In other applications,
a precise level of humidity is critical to the conditioning
of the material. General Eastern’s DewPro, HygroTwin/Hygrotec,
and HygroGuard lines utilize a planar capacitive aluminum
oxide sensor for trace moisture measurements from +20°C
down to -110°C dew point temperatures.
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Trace Sensor Technology
Our planar capacitive gold/aluminum
oxide sensor is the technology of choice for dew
point temperatures below 0°C in gases and non-conductive
liquids. Sensor elements are created on ceramic
substrates; elements are composed of porous, thin-film
aluminum oxide dielectrics with high-purity aluminum
bases and thin deposited gold films as the capacitor
plates (see illustration above). The moisture of
the process fluid equilibrates rapidly with the
porous aluminum oxide. The moisture content is reflected
in the capacitance of the sensor. |
