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GE M-Series Aluminum Oxide Trace Moisture Dew Point Probe

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GE M-Series Aluminum Oxide Trace Moisture Dew Point Probe
July 23, 2026

GE M-Series Aluminum Oxide Trace Moisture Dew Point Probe

GE M-Series is the classic alumina sensing probe family of GE Panametrics, applied for trace moisture & dew point detection in industrial gas and non-aqueous liquid media. Compatible with full-series GE moisture analyzers, it features stable calibration, fast response and high-pressure resistance for long-term online process monitoring.

Description

GE M-Series moisture probes adopt the patented thin-film aluminum oxide capacitive sensing principle. The sensor structure consists of a porous alumina substrate covered with a thin gold conductive film, forming a capacitance unit. Water molecules permeate the gold layer and are adsorbed inside alumina pores; the capacitance impedance changes linearly with water vapor partial pressure, and matched analyzers convert impedance signals into dew point temperature, ppm moisture and absolute humidity values. The core Ni2 nickel-based sensing chip effectively reduces measurement hysteresis and long-term drift, keeping calibration validity for a long period.

Main mainstream sub-models composition

  1. MS29: Short body compact probe, suitable for narrow pipeline installation space, general low/medium pressure gas measurement

  2. MS32: Standard universal specification, the most widely used model for conventional natural gas, compressed air pipelines

  3. MMS35 series probes (MMS35-32S / MMS35-331-1-100 etc.): High-pressure reinforced structure with multi-layer sintered stainless steel filter, anti-oil mist and dust pollution, supporting up to 345bar working pressure

    All M-series probes reserve built-in NTC thermistor for automatic temperature compensation to offset measurement errors caused by pipeline temperature fluctuations.

Core structural & performance parameters

  • Measuring range: Dew point -110℃ ~ +70℃, covering ultra-dry trace moisture to ambient humidity conditions

  • Pressure tolerance: Vacuum ~ 5000 PSIG (345 bar), applicable for high-pressure gas gathering and transmission pipelines

  • Response speed: 63% moisture step change response within 5 seconds, tracking real-time gas moisture fluctuation rapidly

  • Wetted material: Seamless welded 316L stainless steel, front sintered metal filter prevents particulate matter and condensate from damaging the sensitive chip

  • Interface standard: Unified 3/4 inch-16 thread installation port, aviation plug connection, cable transmission distance up to 610 meters without signal attenuationManualsLib

  • Safety certification: Matched with intrinsic safety barriers to meet hazardous area explosion-proof requirements for petrochemical flammable gas environments

Every single M-series probe is calibrated individually with NIST-traceable standard moisture sources before factory delivery, with complete calibration documents for industrial quality filing and inspection traceability. It perfectly supports GE MTS6 analyzers, PM880 portable dew point meters, Moisture.IQ transmitters and HygroPro transmitters to form a complete online trace moisture monitoring system.

Application scenarios

Natural gas pipelines, flare gas monitoring, dry compressed air systems, hydrogen/inert gas purification, semiconductor process gas, power plant SF6 equipment, petrochemical tail gas, thermal treatment furnace atmosphere, pharmaceutical production gas quality monitoring.
Daily maintenance workload is low; only regular pipeline purging and annual calibration verification are required. No wearable electronic parts inside the probe body, effectively reducing the overall operation and maintenance cost of industrial gas analysis systems.


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