Phymetrix Loop powered Moisture Probe Model: PLMa-ProbeEx
In-situ measurement without exhausting any of the sample gas

Can be inserted into pressurized pipeline through 1/2″ or larger ball valve
Customized insertion lengths field adjustable
Natural Gas Dew Point Meter

  • -110°C to +20°C dew point Sensor
  • Fast, Accurate and Repeatable
  • Small & Lightweight
  • State-of-the-art electronics & software
  • 316 Stainless Steel & PTFE wetted parts
  • NIST calibrations
  • Stainless Steel IP68 housing
  • Protection from reversed polarity
  • Interfaces to a variety of panel meters DD4 and DD5
  • Units of measure: °C & °F dewpoint, ppmV, ppmW,
    µB H2O vapor pressure, grams of H2O / m3,
    Lbs H2O /106 standard cubic feet in Natural Gas.
  • 4/20 mA Loop Powered with HART
  • optional RS-485 Modbus
  • Wide loop voltage range 5VDC to 28VDC
  • Built-in temperature compensation
  • Optional pressure sensor
  • Built-in self-test and diagnostics
  • HART interface compliant
Moisture Sensor
(dew point sensor)
  • Range: -110°C to +20°C dewpoint ( -166°F to +68°F dewpoint )
  • Accuracy: ±2°C temperature corrected
  • Repeatability: 0.8°C
  • Response time: 95% of step change in 3 min.
  • Sample flow: >1 LPM
Temperature Sensor
  • Range:  -40°C to +70°C
  • Accuracy:  ±2°C
  • Easy and quick installation, no special tools required
  • 5VDC to 28VDC two wire loop operation 4mA to 20mA with HART
  • Housing isolated from 4-20mA Loop
  • Measurement resolution of moisture sensor: 1pF resulting in less than 0.01 ̊C
  • Two conductor cable min. 24AWG (for total cable length >1mile min. 20AWG) To meet CE requirements cable must be shielded.
  • Built-in digital I/O for optionally controlling relays
  • All 316 Stainless Steel and PTFE wetted parts for fast response time.
  • Enclosure all stainless steel construction IP67 protection
  • Dimensions: 3.25″ (82.6mm) diameter Explosion Proof enclosure 2.5″ high
  • Process threads 1/2″ NPT
  • Weight Total: 6 oz (0.17 Kg)
  • Pressure: 5000 PSIA (345 Bar)
Temperature Range
  • PLMa Analyzer: -20°C to +60°C
  • Electronics: -40°C to +85°C
  • Moisture Sensor: -20°C to +60°C
Miscellaneous Features
  • NIST traceable calibrations
  • Units of measure: °C & °F dewpoint, ppmV, ppmW, µB H2O vapor pressure, grams of H2O / m3,
    Lbs H2O /106 standard cubic feet in Natural Gas.
  • Digital & Analog: Two Wire 4/20mA loop with HART®
  • Transmitter stores all HART setup

Dew Point Probe for: Compressed Air, Natural Gas, Cryogenic Gasses, Welding Gasses, Insulating Gasses   SF6, H2, N2 etc…..


Not Shown But Included:

  • User’s Manual
  • NIST Certificate
  • Shipping Container with desiccant


PhyMetrix Loop-powered In-Situ Moisture Probe PLMa-PrbEx
RS-485 Modbus option suffix -D

Remote Display and Power for PLMa’s