ETA Process Instrumentation - since 1971


ETA Process Instrumentation - Since 1971
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  • Full line of precision hygrometers using the most accepted, proven technologies.
  • Kahn hygrometers measure moisture in a broad variety of gases from vacuum to 6000 PSIG.
  • Measure dewpoints from -120°C to +90°C (-184°F to 194°F).
Ceramic  Sensors
  • Fastest Response Time
  • Greatest Corrosion Resistance
  • Learn more


Chilled Mirror Optical Systems 
  • Provide a fundamental method of dewpoint measurement.
  • Extremely accurate
  • Learn more

Kahn Optidew


Kahn Opticalc



  • Measurement and Control of Compressed Air Systems - Hygrometers are used to measure the dewpoint at the outlet of desiccant and refrigerated air and gas dryers to insure the air is correctly conditioned.
  • Natural Gas Processing - Intrinsically safe portable and stationary units are used to measure the Pounds of Water per Million Standard Cubic Feet of Gas (#/MMSCF) throughout the production, transmission and distribution phases of natural gas processing.
  • Hydrogen Generators - Electric utilities monitor the dewpoint of hydrogen cooling gas surrounding turbine generators. Semiconductor Manufacturing- Dewpoint measurement of inert gases to the low parts per billion (ppb) level allows wafer and component manufacturers to produce high-quality parts.
  • Sulfur Hexafluoride Monitoring - Sulfur hexafluoride (SF6) gas is used as an insulator in circuit breakers and transformers. Kahn hygrometers monitor the dew point of the SF6 to insure its integrity as an insulator.
  • Hygrometer Calibration- Kahn optical hygrometers are used as transfer standards to calibrate on-line and portable hygrometers throughout industry.

Additional Application Notes:

For additional information, complete this application data sheet and email to or fax to 978 532 7325.

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ETA Process Instrumentation, 119 Foster Street, Bldg. 6, Peabody, MA 01960 (978) 532-1330 or