The formation of deposits in liquid-filled systems is a major industrial & social problem. So-called biofilms in particular pose a particular hazard potential. This can lead to a deterioration in water quality or even to a health hazard for consumers due to the release of germs from biofilms. In addition, biofilm formation also leads to very high economic losses in many branches of industry, e.g. due to an increase in

Service life of plants. ISAT has developed an innovative acoustic measuring method for the non-invasive monitoring of layer formation in liquid-filled systems. By means of a sensor retrofitted from outside, the layer formation inside liquid-filled plant components such as pipes, tubes or containers monitored online.

ISAT Technology: Layer detection in tubes & pipes

Biofilm detection in tubes

Sensor facts

  • Non-destructive acoustic measurement method
  • Online measurement of layer formation
  • Optimized for stainless steel pipes DN40-50, adaptable for other diameters / materials
  • Detection & differentiation of soft layers (e.g. biofilms) or hard layers (e.g. lime) possible
    Layer thickness range: 50 – 5000 µm
  • Upgrade to multi-sensor technology (flow, level) possible
  • µController-based sensor electronics with integrated temperature compensation


  • Non-invasive measuring principle – means no intervention in the process necessary (reduction of contamination risks)
  • Fast commissioning, retrofittable
  • Low-maintenance and low-wear sensor configuration without moving parts
  • Optimization of cleaning intervals and conservation of resources & environment
  • Improvement of plant safety
  • Increasing the service life of components
  • Early detection of layer deposits/biofilms and resulting friction losses
  • Cost savings through reduction of downtimes, system damage & consumption of disinfectants

Fields of application

  • Drinking water supply
  • Wastewater treatment
  • Chemical industry
  • Textile industry
  • Food industry
  • Medical technology
  • Oil/Gas Industry