Phymetrix Explosion-Proof Moisture Probe Model: ExMa-Probe
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
Unique State of the Art Features;
Menu-driven, intuitive, easy-to-use
Natural Gas Dew Point Meter

  • -110°C to +20°C dewpoint Sensor
  • Fast, Accurate and Repeatable Moisture Meter
  • Built-in temperature compensation
  • optional built-in pressure sensor with compensation
  • optional 4/20 mA sink or source output
  • optional RS-485 Modbus interface
  • 3″ viewport, NEMA 4X/IP67 & Explosion-proof
  • State-of-the-art electronics & software
  • Advanced User-friendly Interface
  • Continuous Status and Diagnostics display
  • On-screen histogram and trend graph
  • Programmable data logging, clock calendar
  • Virtual Analyzer PC s/w for training & evaluation
  • 316 Stainless Steel & PTFE wetted parts
  • NIST calibrations
  • Cost Effective Complete In-Situ System
  • Thru-the-Glass Touch User Buttons
  • Approved Explosion-Proof Installations USA, Canada, ATEX
  • Installation Indoor/Outdoor On-The-Pipe or Panel
natural gas dew point meter 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
Pressure Sensor
  • 2 to 1000 PSIA  ±1%, 316L stainless steel wetted parts (higher pressure ranges available)
  • 3 automatic detection – self configuring power modes:
    1) 90-260VAC 47-440Hz
    2) 12-24VDC 10VA
    3) Optional 4/20mA Loop Powered
  • Power modes 1 or 2 have the following I/O options:
    a) RS-485 isolated Modbus® interface
    b) Analog Output 4/20mA sink or source isolated with HART®
    c) up to 3 Alarm Relays – 3A, 250VAC contacts
  • Enclosure
    • Aluminum or optional 316 Stainless Steel,  Glass lens, IP66 & IP68
    • FM/CSA Explosion Proof Certified Class I, Div I, Groups B, C And D Class II, III, Div 1, Groups E, F And G  ATEX Explosion Proof Certified ATEX 2 GD, Exd I & IIC;  IECEx, Exd I & IIC
    • Dimensions- L:  8.9″ (226mm) W:  5.8″ (147mm) H:  5.8″ (147mm)
  • Weight Total:  5.5 Lbs (2.5 Kg)
  • Pressure: 5000 PSIA (345 Bar)
  • 3/8″ dia. probe has only 0.11 square inch cross
    sectional area, thus even at high pipeline pressures the
    probe can be inserted with minimal force
  • 1/2″ NPT Connection to valve, adapters allow interfacing to larger valves
  • All 316 Stainless Steel and PTFE wetted parts, small surface area for fast response time.
Temperature Range
  • ExMa Moisture Meter: -20°C to +60°C
  • Electronics: -40°C to +85°
  • Moisture Sensor: -20°C to +60°C
  • Pressure Sensor: -20°C to +85°C
  • LCD operating: -20°C to +70°C storage: -30°C to +80°C
Miscellaneous Features
  • Through the glass user interface buttons, allow operation while enclosure is closed
  • 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. (All units auto-scaled)
  • Virtual Analyzer PC software for training and evaluation,  allows the user to experience the exact interface on their own PC with voice explanations

Standard Accessories for ExMa moisture meter:

  • Pluggable Electrical Screw Terminal Connectors
  • Ex Certified Side Port (3/4″ NPT) Plug


PhyMetrix Explosion Proof Moisture Probe ExMaProbe
Stainless Steel Enclosure suffix -S
Pressure sensor option 0-1000 psia automatic pressure correction suffix -P
Mounting Legs suffix -M
Analog Output 4/20 mA with HART® option suffix -A
RS-485 with Modbus® option suffix -D
Explosion Proof ATEX option suffix -I
If Required Specify Inlet and/or Outlet Adapters