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Measure, set alarms and control biofilm activity in your water system

Biofilm Sensor

Key Features

  • Legionella control
  • Automatic Biocide control
  • No maintenance
  • Seawater option
  • Up to 10 Bar
  • Reduced chemical costs


The Orakel biofouling sensor provides a relative measure of “activity” of biofilm being present in your process, allowing you to dose your biocide accordingly or take other appropriate remedial action.

How it Works

Electrodes encourage microorganisms to grow on the surface of the probe before they would grow on the surfaces of a pipe or a vessel. The biological activity of the biofilm creates a signal. The controller collects and monitors that signal continually. An increasing trend in the signal indicates the onset of biofilm activity on the probe.

The controller can then take remedial action automatically by, for example, increasing or decreasing the biocide levels, triggering email or text alarms and data logging.



With the biofilm analysers, you can simply monitor and alarm for biofilm in your water system, or  implement a sophisticaled control regimen.

The Orakel Biofilm gives you:

  • Control of system surface biological activity
  • Treatment effectiveness monitoring
  • Biocide program optimisation
  • Indication of a “clean” state

Biofilm sensor options

  • NPT or BSP fittings
  • Flow cell
  • Stainless steel electrodes
  • Titanium electrodes for sea water

Monitoring Biofilm

The Biofilm sensor was developed to provide a real-time indication of biofilm activity on typical surfaces.  The probe is designed and operated so that microorganisms in the environment will settle and reproduce on probe surfaces before they settle and reproduce on vessel walls or piping. This gives an early warning of potentially dangerous biological activity in the process. By closely tracking biofilm activity on the probe, the Orakel system can take remedial action such as increasing the dosing of a biocide or dispersant.

The Orakel controller can also be used to assess the effectiveness of a treatment, or to schedule maintenance activities. By monitoring biofilm activity on surfaces very precisely, costly over-treatment can be avoided and chemical treatments can be optimised. By monitoring Biofilm with The Orakel System, you can:

  • Reduce the risk of Legionella growth
  • Reduce the cost of chemical treatment
  • Reduce maintenance
  • Reduce the time taken to fix problems
  • Increase the efficiency of process equipment

Automatic Biocide Control

Measuring the residual biocide in a body of water only tells half the story. It tells you that there is little or no biological activity in the bulk water. This doesn’t necessarily mean that biofilm isn’t building up on the walls of pipes and vessels with the possibility of the development of harmful bacterial colonies. The Biofilm monitor can come equipped with an optional GSM/GPRS modem, which triggers text alarms or emails relating to the chemistry of the treated water. It also allows you to monitor the build up of any biofilm and in turn take the appropriate action AUTOMATICALLY to return the system to a clean condition. This could be as simple as triggering an alarm for a manual intervention or as complex as increasing biocide levels or shock dosing, all controlled by the Orakel controller.

Legionella and Pseudomonas

Cooling systems and heating systems in e.g. hospitals, airports and hotels can be a source of the Legionella or Pseudomonas bacterium. The bacteria often grow in biofilms that adhere to the walls of water systems. The Biofilm sensor allows you to monitor for the development of these biofilms and dose the appropriate chemicals to reduce and disperse the biofilm prior to building up to a dangerous level of Legionella or Pseudomonas. Biofilms can also induce corrosion and reduce heat exchange efficiencies all of which can be expensive if not controlled appropriately.

Learn More

Find the most up to date product information and available downloads

Downloads – EN:
MMS D009 – ORAKEL Biofilm datasheet
MMS D017 – ORAKEL control unit datasheet

Biofilm FAQs

Datenblätter – DE:
MMS D021 – GmbH ORAKEL Biofilm
MMS D029 – GmbH ORAKEL Control Unit

Watch our Predictive Data Monitoring Video here

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