HygroPro ll Aluminium Oxide Moisture Transmitter

  • Moisture Detection from Trace to Ambient Levels Moisture detection in gases and hydrocarbon liquids
  • Built-in Temperature Sensor Provides temperature compensation
  • Optional Pressure Sensor
  • Intrinsically Safe
  • NIST Traceable Calibration
Product Options


The HygroProII from Panametrics, is a loop-powered, intrinsically safe moisture transmitter capable of trace or ambient moisture detection in gases and hydrocarbon liquids. It has been specifically designed to meet the high demands of rugged industrial and hydrocarbon processing applications.

The HygroProII combines robust electronics with the latest state-of-the-art aluminium oxide sensor, the FX sensor, to provide unequalled overall performance.

Up to three parameters can be viewed simultaneously on integrated backlit display. The display combined with the six-button keypad allow easy navigation of the software for configuration and diagnostics.

You can learn more about the HygroPro II in this video.

Manufactured by: Panametrics
Model: HygroPro ll Aluminium Oxide Moisture Transmitter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Natural gas
Industrial gas
Power generation
Furnace gas/heat treating
Air dryer


Calibration ranges (dew/frost point)
Standard 50 to -112°F (+10 to –80°C) with data from +68 to -166°F (+20 to -110°C)
Operating temperature -4°F to 140°F (–20°C to 60°C)
Storage temperature -40°F to 158°F (-40°C to 70°C)
Accuracy ±3.6°F (±2°C) above -148°F (-100°C)
±5.4°F (±3°C) below -148°F (-100°C)
Repeatability ±0.4°F (±0.2°C) above -148°F (-100°C)
±0.9°F (±0.5°C) below -148°F (-100°C)
  • Voltage: 12 to 28 VDC (loop-powered, customer supplied)
  • Output: 4 to 20 mA analog & HART digital
  • Output Resolution: 0.01 mA/12 bits
  • Cable: 6 ft. (2 m) and 30 ft. (10 m) options standard (consult factory for custom lengths); cable includes molded weatherproof connector with flying leads
  • 128 x 64 LED backlit LCD
  • Display from one to three parameters and diagnostics
Sample connection
  • 3/4-16 in. (19 mm) straight male thread with O-ring
  • G 1/2 with optional adapter
Operating pressure 5 μm Hg to 5000 psig (345 bar)
Enclosure Type 4X, IP 66 and IP 67
  • H x W x D: 7.88 x 3.99 x 2.56 in. (200 x 101 x 65 mm)
  • Weight: 2.53 lbs. (1147 g)
European compliance Complies with EMC directive 2014/30/EU
Hazardous area certification
  • US/Canada: Class I, Division 1, Groups A, B, C and D; T4 Class II, III Division 1, Groups E, F and G; T4 (US Only) Class I, Zone 0, AEx ia IIC T4 Ga
  • US/Canada: Class I, Division 2, Groups A, B, C and D; T4 Class II, III Division 2, Groups F and G; T4 Class I, Zone 2, AEx ic IIC T4 Gc (US Only)
  • ATEX/IECEx: Ex ia IIC T4 Ga; Ex ic IIC T4 Gc
  • Ambient temperature range -20°C ≤ Ta ≤ +60°C Single Seal Certified per ANSI/UL 122701
Moisture sensor
Sensor type Thin-film aluminum oxide moisture sensor
Calibration Each sensor is individually computer-calibrated against known moisture concentrations, traceable to national standards
Calibration interval Panametrics recommends moisture sensor recalibration every six to twelve months depending on application
Temperature sensor
Sensor type NTC thermistor
Operating range -22°F to 158°F (–30°C to 70°C)
Accuracy ±0.9°F (±0.5°C) overall
Pressure sensor
Sensor type Solid state/piezoresistive
Available ranges
  • 30 to 300 psig (3 to 21 bar)
  • 50 to 500 psig (4 to 35 bar)
  • 100 to 1000 psig (7 to 69 bar)
  • 300 to 3000 psig (21 to 207 bar)
  • 500 to 5000 psig (35 to 345 bar)
Accuracy ±1% of full scale (FS)
Pressure rating Three times the span of the specified range to a maximum of 7500 psig (518 bar)