M Series - Aluminum Oxide Moisture Probe

  • Optional Temperature Sensor operating temperature range is -166F to 158F (-110C to 70C)
  • Intrinsically Safe used in conjunction with certified electronics or zener barriers
  • True Absolute Humidity Sensor improves performance considerably
Product Options


The M Series Aluminum Oxide Moisture Probes, are used in conjunction with the Panametrics hygrometer connected by cable. The film thickness for the M series probe is critical to achieve quick results with excellent calibration stability. The use of an oxide film thickness can improve performance considerably exhibiting true absolute humidity, rather than relative humidity response. Operating temperature range is -166F to 158F (-110C to 70C) with a pressure range from 5000 psig (345 bar).

Advancements in moisture calibrations now allow probes to use flow, temperature and pressure measurements, traceable to NIST/NPL, to record accurate moisture concentrations. Measurement of water vapor pressure is easily achieved in both gases and liquids using the M Series probe. Cable length between the hygrometer and probe can be upto 2000ft. This allows the M series to avoid limitations providing easy installation and little to no maintenance,

Manufactured by: Panametrics
Model: M Series - Aluminum Oxide Moisture Probe

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


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


Moisture probe
Intrinsic safety Intrinsically safe when connected to a Panametrics Moisture Series analyzer, PM880 portable hygrometer or intrinsically safe barriers in accordance with the user’s manual.
M Series moisture probe:
EX II 1 G EEx ia IIC T4 (-20°C to +80°C), and CSA C US Class I,
Division 1, Groups A,B,C&D T4, LR44204-23
European compliance Complies with EMC Directive 2014/30/EU and PED 2014/68/EU for DN<25
Type Aluminum oxide moisture sensor
Calibration Each probe is individually computer calibrated against known moisture concentrations, traceable to national standards.
Dew/frost point calibration ranges
  • Overall capability: 140 to -166°F (60 to –110°C) by request
  • Standard calibration range: 50 to -112°F (10 to –80°C) with data provided from 68 to -166°F (20 to -110°C)
  • Ultralow calibration range: -58 to -148°F (-50 to –100°C) with data to -166°F (-110°C)
  • ±3.6°F (±2°C) above -148°F (–100°C)
  • ±5.4°F (±3°C) below -148°F (-100°C)
  • ±0.4°F (±0.2°C) above -148°F (–100°C)
  • ±0.9°F (±0.5°C) below -148°F (–100°C)
  • Operating temperature: -4°F to +140°F (–20°C to +60°C)
  • Storage temperature: -22°F to +158°F (–30°C to +70°C)
Operating pressure (dependent on mount)
  • Flange process connection (M1): 5 µHg to 75 psig (6 bar)
  • Threaded process connection (M2): 5 µHg to 5000 psig (345 bar)
Flow range
  • Gases: Static to 10,000 cm/s linear velocity at 1 atm
  • Liquids: Static to 10 cm/s linear velocity at a density of 1 g/cc
Input voltage 1 VAC, 77 Hz
Optional temperature sensor
Type Nonlinear negative temperature coefficient (NTC) thermistor (resultant temperature linearized by microprocessor)
Operating range –22 to 158°F (–30 to 70°C)
Accuracy ±0.9°F (±0.5°C) overall
Response time (maximum) 1 second in well-stirred oil or 10 seconds in still air for a 63% step change in increasing or decreasing temperature