OL-55 On-Line Tensiometer



By continuously measuring surface tension, the OL-55 monitors the level of surface active chemical additives in water-based process liquids. Based on the information from the measurement the operator can either manually dose chemicals into the process or the optional auto-dosing system can be used.


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
  • Eliminates overdosing of surfactants - reducing costs
  • Controls processes - improves efficiency and quality
  • Reduces waste and improves yield
  • Improves environmental control
  • Extends chemical lifetime in processes


Surface tension measuring range 20 to 80 mN/m
Resolution 0.1 mN/m
Update time for liquid
 3 minutes from change in process liquid 
Temperature measuring range (optional)
 15 to 85°C
pH measuring range (optional)
 2 to 14
Flow rate
 18 l/h
Self-cleaning filter
 Standard 100 μm (others by request)
 100-240 V (automatic) 50/60 Hz
Power consumpiton
 < 60 W
Fuses 315 mA
Dimensions 544 x 428 x 236 mm (H x L x D)
Optional features
  • On-line pH monitoring
  • On-line conductivity monitoring
  • On-line process temperature measurement
  • Automatic dosing of surfactants and clean water based on measurement data
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