Biofilm on sensor

Biofilm growing on a BioSense sensor

The BioSense biofilm sensors are available with different controllers to give you the same great performance with different communication, display, and control options. With the BioSense range of biofilm analyzers, you get everything that you need – and nothing that you don’t.

The BioSense sensor was developed to provide on-line and real-time indication of biofilm activity in cooling towers, hospital water systems, pools, and spas, in fact anywhere biofilm cover grows. The probe is designed and operated so that microorganisms in the environment will settle on probe surfaces before they settle 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 BioSense can take remedial action such as increasing the dosing of a biocide or dispersant. The BioSense biofilm controller can also be used to assess the effectiveness of a treatment, or to schedule maintenance activities. By monitoring biofilm activity on surfaces, costly over-treatment can be avoided and chemical treatments can be optimized.

The controller applies a potential between the probe electrodes that encourages microorganisms to settle or adhere or grow on the surface of the probe before they would settle on the surfaces of a pipe or a vessel. The biological activity of the biofilm creates a signal. A BioSense 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. The CRONOS BioSense is a simple controller capable of automatically changing, dosing regimes etc. With the more sophisticated CRIUS® and CRATOS controllers providing, data logging, remote access and control via GSM.


Cooling towers systems, cooling and heating systems in e.g. hospitals, airports, government buildings, hotels and very large office blocks can be a source of the Legionella or Pseudomonas bacterium. The bacteria often grow in biofilms that adhere to the walls of a pipe or other vessel. The BioSense sensor allows you to monitor for the development of this biofilm buildup and dose the appropriate chemical to reduce and disperse the biofilm prior to building up a dangerous level of Legionella.

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 BioSense allows you to monitor the build up of that 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 BioSense controllers. The BioSense gives you:

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

Remote Access Control

The Process Instrument CRIUS & CRATOS controllers can provide as an option, remote access via LAN or GPRS modem. This capability is unique in that it

  • provides two way communications allowing not just to the downloading of data but the uploading of new settings, set-points, PID controls, etc.
  • provide peer to peer communication so the controller talks directly to the internet, there is no web site in the middle to have to log on to.
  • email alarms and daily emails can be sent to up to 5 email address. The daily email has the previous 24 hours data attached, so you need never download data again, it just arrives in your in-box.

Pi provides a live demonstration of this capability. Click here to view it.

Gallery


Document Type Size
Biofilm Monitor – BioSense (EN) [ISB39] PDF 250Kb
BioSense (EN) [ART1] PDF 250Kb