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MM400 Moisture Analyzer for process gas measurement

Moisture Analyzer MM400

Advanced technologies in process gas measurement for a maintenance-free moisture analyzer.

The MM400 moisture / dew point hygrometers are designed to be customised to your application giving precise measurements while providing a simple, yet affordable moisture analyzer.

Incorporating our high quality aluminium oxide moisture sensor which provides accurate, dependable results over a wide range from -100°C to +20°C (-148°F to 68°F) dew point. The aluminium oxide sensor is maintenance-free and is the popular choice for the most demanding applications.

The MM400 moisture analyzer is available in three different configurations:

  • Panel-mounted bench mounted moisture analyzers
  • NEMA 4X / IP66 waterproof and weatherproof moisture analysis units
  • 19 in. rack mount.  Combine the moisture analyzer with any of our oxygen or carbon dioxide analyzers to create a dual gas analyser.

These units are completely configurable and include the ability to remote mount sensors and offer user-selectable units of Dew Point (°C or °F) or ppmv. Two versions of the sensor are available to meet your needs:

  • The general purpose sensor includes flow valves and can be mounted up to 1km from the analyser.
  • The intrinsically safe remote sensor allows for installations into hazardous areas. This sensor is approved by BASEEFA and CENELEC to ATEX II 1G/EEx ia IIC T4 standards.

Stainless steel housings, laboratory grade components and controlled environment manufacturing ensure the finest, most consistently precise sensors in the industry.


  • Industry : Process
  • Gas : Moisture
  • Application : Industrial Gas, Intrinsically Safe
  • Measurement range : Autoranging from -100°C to +20°C (-148°F to 68°F) and equivalent in ppm(v) moisture
  • Technology : Aluminium oxide
  • Accuracy : ±1°C from -60°C to +20°C. ±2°C from -100°C to -60°C
  • Response Time : Wet gas to dry gas: -20°C to -60°C, less than 60 seconds. Dry gas to wet gas: -100°C to -20°C, less than 60 seconds
  • Unacceptable gases : Corrosive gases, Mercury, Ammonia, Chlorine, HCI, Ozone
  • 19 inch mounting option : Can be combined with our oxygen and carbon dioxide analysers in a 19 inch mount configuration to create a dual gas analyser

Features and benefits

  • Autoranging from -100°C to +20°C (-148°F to 68°F) dew point
  • RS232/485 outputs
  • °C, °F, and ppmv units
  • Calibration traceable to NIST
  • Remote sensors available
  • Fast response and recovery from saturation
  • Fault alarm
  • Intrinsically safe option



  • Industrial specialty gases
  • Chemical manufacturing
  • Plastics manufacturing
  • Heat treating furnaces
  • Compressed air
  • Inert atmosphere blanketing
  • Air dryers
  • Natural gas
  • Metallurgy


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