On-line Process Liquid Control Systems

Biolin Scientific

KSV's unique patented measuring technology enables accurate monitoring of process parameters without operator influence. The rugged design of the products enables use in demanding industrial environments. The instruments are ideal for process analytical technology (PAT) applications.

An at-line version of the technology is also available from KSV for batch-sampling operation.

Continuous monitoring means:

  • No overdosing of surfactants - reduced costs
  • Controlled process improves efficiency and quality
  • Less waste and higher yield
  • Improved environmental control
  • Extended chemical lifetime in processes

Uncontrolled dosing of surfactants

On-line Tensiometer OL-55

The OL-55 is an on-line Tensiometer for continuous monitoring the levels of chemical additives in process liquids by measuring the surface tension of the liquid. The surface tension correlates with the amount of surfactants in a water-based solution.

Based on the information from the measurement the operator can dose chemicals into the process or the optional auto-dosing system can do it automatically.

On-line Tensiometer

On-line tensiometer

  • Continuous monitoring of surface tension and other parameters, including pH, temperature, and conductivity, in various process liquids for optimising the dosing of chemicals
  • Rugged design for factory applications
  • Fully automatic computer controlled operation
  • Patented technology


  • No overdosing of surfactants - reducing costs
  • Controlled process - improved efficiency and better quality
  • Less waste and higher yield
  • Increased environmental control
  • Extended chemical lifetime in processes


  • Automobile industry
  • Can and bottle manufacturing
  • Metal processing
  • Food & pharmaceutical applications
  • Pulp and paper industry
  • Oil and lubrication applications
  • Glue, paint, coating manufacturing


  • On-line monitoring of pharmaceutical processes (PAT)
  • De-greasing
  • Surface treatment processes
  • De-inking and flotation
  • In-line cleaning control
  • Liquid cleaning processes

Specifications OL-55

  • Measuring range: 20 to 80 mN/m
  • Resolution: 0.1 mN/m
  • Update time for liquid: 3 min from change in process liquid
  • Temperature of liquid: 15 to 85°C
  • Acceptable pH: 2 to 14
  • Flow rate: 18 l/h
  • Self-cleaning filter: Standard 100 m (others by request)
  • Voltage: 100-240V (Automatic), 50/60Hz
  • Power consumption: < 60W
  • Fuses: 315 mA T
  • Dimensions: 544 mm x 428 mm x 236 mm (HxLxD)


  • pH-monitoring
  • Conductivity monitoring
  • Process temperature measurement
  • Automatic dosing of surfactants and clean water
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