PM880 Portable Hygrometer / Moisture Analyzer

  • Intrinsically Safe
  • Suitable for Natural Gas and Other Industrial Gases/Liquids
  • Up to 15 - 24 Hours of Battery Life Specially designed for portable use
Product Options


The PM880 hygrometer is a complete, intrinsically safe, portable system with options and accessories to meet all industrial moisture measurement needs.

This hygrometer is small, lightweight, and easy-to-use. The large LCD displays moisture readings in dew point (°C or °F), ppmv, ppmw, lb/MMSCF (natural gas) and a variety of other unit options. Data can be viewed in alphanumeric or graphic formats. A rechargeable battery pack and battery charger make this the ideal go-anywhere moisture analyzer.

Manufactured by: Panametrics
Model: PM880 Portable Hygrometer / Moisture Analyzer

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


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


Channels Single channel
  • Size: 9.4 x 5.5 x 1.5 in. (238 x 138 x 38 mm)
  • Weight, electronics: 2.5 lb (1.13 kg)
  • Weight, sample system: 4 lb (1.8 kg)
Enclosure Type 4X, IP67
Internal battery Rechargeable. PM880 batteries can be installed or removed in hazardous areas. Batteries must be recharged in non-hazardous areas only.
Battery life 15 to 24 hours depending on type of probe; battery life reduced when operating below 32°F (0°C)
Battery charger
  • Switchable input: 115 or 230 VAC, 50/60 Hz
  • Requires approximately three hours for full battery recharge
Memory FLASH memory
Operating temperature

14 to 122°F (–10 to 50°C)
To ensure maximum battery life, Panametrics does not recommend storage at temperatures exceeding 95°F (35°C) for longer than one month.

Keypad 25-key, rubberized, tactile membrane
Display 240 x 200 pixel, graphic backlit LCD display
Printer/terminal output Infrared communication port
Cables Cable type dependent on probe type: M Series, TF Series, or Moisture Image Series. LEMO®-tobayonet connector
Cable length
  • Standard: 10 ft (3 m)
  • Optional: Consult Panametrics for other lengths
Hazardous area classification Intrinsic-safety certification: Baseefa (2001) Ltd.
EX II 1 G EEx ia IIC T3 (–20°C ≤ Ta ≤ +50°C)
Baseefa02ATEX0191; and CSA C US Class I, Division 1,
Groups A, B, C & D, Type 6
European compliance EMC Directive 2004/108/EC, EN61326-1:2013, Class A, Table 2, Industrial Environment
Site parameter programming Menu-driven, graphic, operator interface uses keypad and soft-function keys. Online help functions. Memory storage for saving site parameters.
Data logging Memory capacity to log over 100,000 moisture data points. Programmable keypad for log units, update times, and start/stop times.
Display functions Displays measurements and logged data in alphanumeric or graphic format.
Display units
  • Moisture: DP temperature, ppmv, ppmw, % RH, lb/MMSCF and others
  • Temperature: °F, °C and °K
  • Pressure: psig, bar, kPa (gauge), kg/cm2 (gauge) and others
Moisture measurement
Compatibility Compatible with all Panametrics aluminum oxide moisture probes: M Series, TF Series, and Moisture Image Series. Each probe type requires a different type of I/O cable.
Calibration Panametrics moisture sensors are computercalibrated to National Institute of Standards and Technology (NIST) traceable moisture concentrations.
Dew/frost point temperature
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)
Accuracy (dew/frost point)
  • ±3.6°F (±2°C) above -148°F (-100°C)
  • ±5.4°F (±3°C) below -148°F (-100°C)
Repeatability (dew/frost point)
  • ±0.4°F (±0.2°C) above -148°F (-100°C)
  • ±0.9°F (±0.5°C) below -148°F (-100°C)
Operating pressure 5 µ of Hg to 5000 psig (345 bar) limited by pressure sensor (see pressure measurement specifications)
Temperature measurement
Optional thermistor available for all Panametrics moisture probes
Range –22 to 158°F (–30 to 70°C)
Accuracy ±0.9°F (±0.5°C) at -22°F (–30°C)
Pressure measurement
Optional pressure sensor available for TF Series and Moisture Image Series moisture probes
  • 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% at full scale
Proof pressure Three times span of available range up to maximum 7500 psig (518 bar)
Sample system The SS880A standard sample system comprises an inlet needle valve, a builtin coalescing filter and sample cell with a bypass needle valve and venting tube, a pressure gauge (various ranges), and an outlet needle valve with venting tube.
Wetted parts 316 stainless steel
Operating pressure Configurations available for 300, 500, 1000, 2000, or 3000 psig (21, 35, 69, 137, 207 bar), dependent on pressure gauge
Maximum pressure rating
  • Standard: 3000 psig (207 bar)
  • Optional: 5000 psig (345 bar)
Other options
  • Inlet pressure regulator, 0 to 500 psig (1 to 345 bar) outlet
  • Armored flowmeter, 1.3 to 13 SCFH
  • 10-ft (3-m), flexible, polytetrafluoroethylenelined, braided–stainless steel hose with 1/4-inch tube connections. Not recommended for dew point temperatures below –103°F (–75°C).