Viscosity System

Viscosity management solutions

Viscomaster HFVM

VISCOMASTER HFVM with capillary adapter

VISCOMASTER HFVM with inline adapter

Viscosity controller VC322


Your benefits

  • Optimum combustion efficiency
  • Easy of mind due to long term experience and marine type approvals
  • Competitive price
  • Adaptable to own requirements
  • No need for recalibration

Areas of application

The measurement and control of fuel oil viscosity is a known requirement within the marine and diesel engine industries. The HFVM measures liquid viscosity, density, and temperature in aggressive environments. These meters use vibrating fork technology for reliable direct-insertion measurement. HFVMs provide Heavy Fuel Oil (HFO)/Marine Gas Oil (MGO) combustion control, and oil-fired heater and boiler control.


  • Stable and accurate in-line measurements
  • Rugged, reliable, and low maintenance, these meters are the industry standard for HFO measurement applications
  • Retrofit adapters for other manufacturers are available
  • Marine type approvals
  • Proven system (HFVM + VC + MCV)
  • Ready designed control loops for many different requirements

Technical Data

  • Viscosity calibrated ranges:
    – 0.5 to 100 cP (Viscomaster) 0 to 50 cP (Dynamic)
  • Viscosity accuracy:
    – ±1 % span (±0.2 cP in 0.5 to 10 cP range)
  • Viscosity repeatability:
    – ±0.5 % of reading
  • Temperature range:
    – Process -50 to +200 °C (-58 to +392 °F)
    – Ambient -40 to +85 °C (-40 to +185 °F)
  • Pressure range:
    Process connection max. 100bar (1450psi)


Technical documentation Mounting and operating instructions