Product Viscosity Process Analyzer

Viscosity Process Analyzer



  • The only ASTM compliant capillary type viscometer
  • Kinematic viscosity directly and continuously measured
  • Integral measurement of density
  • Calculation of dynamic viscosity
  • Unparalleled temperature stability of ± 0.02K
  • Hagenbach correction not necessary
  • No maintenance approach (no oil bath, no pump)
  • Network and fieldbus communication
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ATEX: II 2G Ex h IIC T4 Gb X
IECEx: on request
NEC 500: Class I, Division 2, Group B,C and D
NEC 505: Class I, Zone 1, AEx db eb ib pxb IIC
T3 resp. T4
CEC Sec. 18: Ex db eb ib pxb IIC T3 resp. T4
TR CU: 1Ex db e ib [ia Ga] mb pxb IIC T4 Gb X

Ambient Temperature



To remain competitive, today’s refiners must employ all optimization and product control techniques available. The use of online physical property analyzers is one of the key features to reach those objectives because they measure important quality properties in the process directly. All fluids that fulfil the conditions of Newton’s friction law are referred to as Newtonian fluids. Their viscosity is a material constant, which is only dependent on pressure and temperature. The viscosity for incompressible and Newtonian fluids can be derived from the so called Hagen-Poiseuille law. The fluid is assumed to flow under laminar conditions.

Technical Data

Technology continuously analyzing kinematic viscosity, capillary-type
Method compliant with: ASTM D445, DIN EN ISO 3104, IP 71
Sample at inlet filtered 10 μm or 50 μm (depending on the viscosity measuring range), bubble-free max. viscosity = end of measuring range (technical clarification required) (sample as coolant ≤ 10 cSt)
3.8 to 10 l/h (depends on variant)
3 to 14 bar (43.5 to 203 psi)
for L + M Versions: TM *-35 K<tinlet tm k for h versions: depends on td> </tinlet>
Sample at outlet can handle back pressure (on request)
Electrical data max. 8 (4 to 20 mA; 1000 Ω); active isolated on request
4 to 20 mA; 160 Ω
24 V DC; max. 0.5 A
high: 15 to 28 V DC/low: 0 to 4 V DC
24 V DC; max. 0.8 A
Communication MODBUS/RTU via RS485 or RS422 or FOC is
ethernet available
kinematic viscosity (others on request)
Alarm, Ready/Valid; Stream Selection, Validation Request, Reset
Ambient conditions operation 5 to 40 °C (41 to 104 °F) storage -20 to 60 °C (-4 to 140 °F)
operation 5 to 80 % relative humidity, non-corrosive; storage 5 to 80 % relative humidity, non-corrosive
IP 54 (comparable with NEMA 13)
HMI touch display 19"
remote access on request
cyber security
operating system Windows10 enterprise LTSB
Bartec Benke control software PACS
Process connections tube fittings: typically Swagelok 6mm/12mm/18mm; others on request
sample inlet up to 2 sample streams and 1 validation stream
sample outlet
vent line (if required)
coolant (if required)
Weight and dimensions approx. 250 kg
(W x H x D) approx. 1190 x 1930 x 710 mm
free space right: 150 mm/left: 100 mm

Application Notes

  • BENKE VISC-4 Viscosity Process Analyzer Reduce production costs in lube oil manufacturing with advanced on-line viscosity measurements.

      Application Note; VISC-4; VI-4; Lube Oil

    • EN

Questionnaires/Requirement Sheets

  • Questionnaire_PL AMS_PAT

Data Sheets

  • BENKE Viscosity Process Analyzer VISC-4


  • BENKE Viscosity Process Analyzer VISC-4

  • Cyber Security Solutions for BARTEC BENKE analyzers