The PDM75-X3SF is a chilled mirror hygrometer
featuring drift-free accuracy, NIST traceability, 
very low maintenance and high durability, all
in an easy to use portable configuration, resulting 
in a system ideally suited for the demands of
field use.

The Model PDM75-X3SF has all the standard features of the 
well known Edgetech Instruments DewMaster Hygrometer in 
a portable package, with a modular chilled mirror sensor that 
is chemically resistant to background gases, configured to meet
your dew/frost point measurement requirements.

Whether you use it as a field transfer standard, to spot check 
your process air dryness or to measure endo gas dew/frost 
point, you will find the PDM75-X3SF delivers the Edgetech 
Instruments Advantage: an ideal system tailored to your
application needs. Choose the customized sampling system 
designed to match your measurement requirements.

Configure it for positive pressure sample gas or to extract 
a gas sample using an integrated vacuum pump. Select 
the best user interface options to meet your needs. The
PDM75-X3SF will be ready to use, right out of the box.

All Edgetech Instruments dew/frost point hygrometers are 
manufactured and supported in the USA in a modern, ISO 
9001:2015 registered facility with ISO/IEC 17025:2017 
accredited calibration laboratory. The PDM75-X3SF is 
delivered with a NIST traceability certificate.

Features:
• Chemically resistant, primary method dew/frost point sensor 
• Drift free and certified against NIST traceable standards
• Best in class air cooled temperature depression
• Wide measurement ranges from –65°C to +70°C 
dew/frost point temperature
• Remotely or locally mounted sensor options
• Automatic Balance Control mode provides automatic 
correction for optics contaminants
• Rugged, high impact portable case
• Multiple interface options
• Choice of sampling systems

Applications:
• Compressed air
• Furnace/heat treating
• Fluidized bed dryers
• Metrology
• Plastic molding
• Pharmaceutical
• Laboratories
• Clean rooms
• Power and energy systems
• Air brake dryer monitoring

Sensor Type: Primary method, chemically resistant, chilled mirror 
dew/frost point sensor

Sensor Construction: Wetted materials:
 316 stainless steel, Teflon, Viton seals 

Mirror: chrome is standard, platinum is optional
Easy access flip top mirror access

Measuring Range:
Dew/Frost Point Temperature:
 X3SF High Efficiency:
 90°C depression, +70°C to –65°C
 No liquid cooling required.

Custom ranges available, please consult factory.

Accuracy:
Dew/frost point: ±0.36°F (±0.20°C)