Hydrocarbon Dewpoint Analyzer


  • Combined measurement of water dewpoint and hydrocarbon dewpoint temperature (HCDT)
  • High measuring confidence, including precision, reproducibility and low hysteresis
  • Moisture content calculation according DIN EN ISO 18453 (GERG)
  • Calibration of HCDT-sensor detection on condensate level (e. g. 5 mg/m³)
  • Long-term stability of the sensors
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ATEX: II 1/2 G Ex ia op is IIC T3 Ga/Gb
IECEx: Ex ia IIC T3 Ga/Gb
NEC 500: Class I, Division 1, Groups A, B, C and D
NEC 505: Class I, Zone 0, Group IIC

Ambient Temperature

Evaluation Unit:
0 °C to 50 °C (32 °F to 122 °F)
Moisture Sensor:
-30 °C to 60 °C (-22 °F to 140 °F)
HCDT Sensor:
-20 °C to 60 °C (-4 °F to 140 °F)



HYGROPHIL® F 5673 is a high-quality, microprocessor-controlled fibre-optic hygrometer for measuring the moisture or trace humidity at low dew-point temperatures in gases and liquids. The version HYGROPHIL® HCDT is equipped with a special sensor and is used in one-channel mode for measuring the dew point of hydrocarbons.

Technical Data

Measuring Technology Fiber optic Fabry-Pérot-Interferometer
Chilled Mirror with detection by internal total reflection
Measurement Channels 1x Trace Moisture (Water Dewpoint Temperature)
1x Hydrocarbon Dewpoint Temperature (HCDT)
Moisture Sensor Calibrated Range: Dew point temperature -80 °C to 20 °C (-112 °F to 68 °F)
Accuracy: +/- 1K
Customized calibration / validation on request
Temperature Range: -30 °C to 60 °C
Pressure Range: 0 to 20 MPa (0 to 2900 psi)
Protection Type: IP65 (in built-in state)
HCDT Sensor Measurement Range (Standard): -20 °C to +5 °C (-4 °F to 41 °F)
Measurement Range (Extended): -30 °C to + 20 °C (-22 °F to 68 °F)
Customized calibration / validation on request (e.g. 5 mg/m³)
Accuracy: +/- 1K
Pressure Range: max. 4 MPa (max. 580 psi)
Protection Type: IP65
Interfaces 3x Analog Outputs (0/4…20 mA)
1x Analog Outputs (0/4…20 mA Ex-i)
HMI Graphic Display (320 x 240)
Red backlit touch-screen
Ambient conditions Evaluation Unit: 0 °C to 50 °C (32 °F to 122 °F)
Moisture Sensor: -30 °C to 60 °C (-22 °F to 140 °F)
HCDT Sensor: -20 °C to 60 °C (-4 °F to 140 °F)
Explosion Protection ATEX
EAC (on request)
Process Integration Sensor Standard Sample Conditioning System
Sample Conditioning System 5985-72 (incl. CE Declaration of Conformity)
Customized Sample Conditioning System
Ready for Hydrogen Hydrogen conent in Natural Gas ≤ 10 Mol %: on request
Hydrogen conent in Natural Gas ≤ 20 Mol %: on request
Operation in pure Hydrogen: on request

Manuals/Operating Instructions/Guides

  • Operating Manual

Data Sheets

  • Product Information and Technical Data