Product HYGROPHIL F 5674


Process Trace Moisture Analyzer


  • Moisture Measurement in Gases and Liquids
  • Combined moisture and temperature sensor
  • Measurement at high pressure up to 20 MPa (2900 psi)
  • Robust sensor construction for outstanding long-term stability
  • On-line solutions with customized sample conditioning systems
  • In-line installations with sensor retraction armature
  • Certified for safe operation in hazardous area
  • Control unit with full remote access
  • Multi channel support
  • Suitable for upgrade / replacement of preceding units (5672, 5673)
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Evaluation Unit - 5674
IECEE: CB Scheme (IEC 61010-1:2010)
UL: 61010-1:2012/R:2019-07
CSA: C22.2 No. 61010-1:2012/A1:2018-11

Evaluation Unit - Channel Card 5674-100
ATEX: II (1)G [Ex ia op is IIC Ga]
IECEx: [Ex ia op is IIC Ga]
cCSAus: [(A)Ex ia op is IIC Ga]

Moisture Sensor L166x:
ATEX: II 1/2 G Ex ia IIC T6 Ga/Gb
IECEx: Ex ia IIC T6 Ga/Gb
cCSAus: CL I, DIV 1, GP A, B, C, D T6 Ex ia
cCSAus: CL I, Zone 0/1, GP IIC T6

Ambient Temperature

Evaluation Unit
41 °F to 122 °F (AC) or 113 °F (DC)
Fibre Optic Cable
-4 °F or -67 °C to 158 °F
Moisture Sensor
-22 °F to 140 °F


Product Video


HYGROPHIL F 5674 is a high-quality, fibre-optic hygrometer for measuring the moisture or trace humidity at low dew-point temperatures in gases and liquids. HYGROPHIL F 5674 works in multi-channel operation with a temperature compensated fibre-optic sensor developed especially for measuring the moisture content in gas mixtures and liquids.

Technical Data

Measuring Technology Fabry-Pérot-Interferometer
Measurement Channels

1 (Single Channel)
1, 2 or 3 (Multi Channel)

Moisture Sensor Calibrated Range: Dew point temperature -80 °C to 20 °C (-112 °F to 68 °F)
Accuracy: +/- 1 K
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)

6x Analog Outputs (0/4…20 mA)
6x Relays (potential-free changeover contacts)
Modbus RTU (RS485)
Modbus TCP/IP (optional)
Ethernet for Remote Access

HMI Windows with 7" touch display
800 x 480 pixels
Ambient conditions Evaluation Unit:
AC: 5 °C to 50 °C (41 °F to 122 °F)
DC: 5 °C to 45 °C (41 °F to 113 °F)
Moisture Sensor: -30 °C to 60 °C (-22 °F to 140 °F)
Explosion Protection

others on request

Process Integration Sensor direct
Gas-/Liquid Separator
Sensor Retraction Armature
Standard Sample Conditioning System
Customized Sample Conditioning System
Ready for Hydrogen Hydrogen content in Natural Gas ≤ 10 Mol %: suitable without limitation
Hydrogen content in Natural Gas ≤ 20 Mol %: suitable without limitation
Operation in pure Hydrogen: suitable without limitation

Application Notes

  • HYGROPHIL F - Natural Gas Glycol Dehydration Units

      Application Note AN002

    • EN

  • HYGROPHIL F - Hydrogen Metering and Gas Grid Infeed Plant

      Application Note AN003

    • EN

  • HYGROPHIL F - Hexanol Production

      Application Note AN005

    • EN

  • HYGROPHIL F - Biogas Metering and Gas Grid Infeed Plant

      Application Note AN006

    • EN

  • HYGROPHIL F - Recycle Gas of Catalytic Reformer

      Application Note AN007

    • EN

  • HYGROPHIL F - Hexene Comonomer Drying with Molecular Sieve

      Application Note AN008

    • EN

  • HYGROPHIL F - Syndiotactic Polystyrene Production

      Application Note AN010

    • EN

  • HYGROPHIL F - Moisture Measurement in Lift Gas

      Application Note AN013

    • EN

  • HYGROPHIL F - Moisture Measurement in Naphtha and Hydrogen for Isomerization

      Application Note AN014

    • EN

  • HYGROPHIL F - Butene Comonomer Drying with Molecular Sieve

      Application Note AN015

    • EN

  • HYGROPHIL F - Solutions for LNG

      Application Note AN016

    • EN

Manuals/Operating Instructions/Guides

  • HYGROPHIL F 5674 - Safety Instructions

      Safety Instructions

    • EN

  • HYGROPHIL F 5674 - Software Manual

      Software Manual

    • EN

  • Sensor Retraction Tool PN250

      Operating Manual

    • EN

Data Sheets

  • HYGROPHIL F 5674 - Evaluation and Control Unit

      Technical Data Sheet

    • EN