Starting at $2,640.00
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  • Loop-powered, 4 to 20 mA transmitter
  • Proven polymer capacitive sensor for fast response and calibration stability
  • Integral filtering and flow regulation
  • Trouble-free indoor or outdoor mounting
  • Microcontroller electronics in Type 4X/IP67 enclosure


The Panametrics DewPro MMR30, formerly General Eastern, is a compact, mid-range moisture transmitter designed specifically for refrigeration dryer manufacturers and users. The DewPro MMR30 measures dew point at line pressure or atmospheric pressure and installs easily on a dryer outlet header.

The DewPro MMR30 uses a proven polymer capacitive sensor to provide a measurement range of 5°F to 185°F (-15°C to 85°C) with ±1.8°F (±1.0°C) accuracy. The optional integrated display with user interface provides full programming and diagnostic capability.

GE General Eastern MMR30 moisture transmitter specifications:
Sensing Element Silicon-based polymer, capacitance principle, IC electronics
Dew Point Range 5°F to 185°F (-15°C to 85°C)
Dew Point Accuracy ±1.8°F (±1°C) above 32°F (0°C) dew point @ 25°C
Operating Temperature Range Process: 5°F to 185°F (-15°C to 85°C)
Electronics: -40°F to 185°F (-40°C to 85°C)
Maximum Operating Pressure 250 psia (17 bar)
Inlet filter: 2 micron sintered stainless steel
Air Bleed Off at 100 psig Approximately 1 SCHF (28 sl/h)
Output Loop current 4 to 20 mA; 16 :A resolution
Flow Block 316 stainless steel with 1/2 in NPT-M or G 1/2 thread; (DIN ISO 228) and gasket seal
Wrench Width for Flow Block 1-5/8 in (42 mm)
Electronics Microcontroller operated
Hardware Selectable Units Dew point temperature in °F or °C
Supply Power 24 VDC nominal, tolerance 12 to 30 VDC
Optional Display Four-digit numeric display with bar graph and matrix position indication. Four user interface keys for unit selections, output adjustments and ranging.
Protection Type 4X/IP67