Foam and Level Measurement and Control


Foam Control

Level Control





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IMA Sensing® technology for Fouling Immunity

Using our patented IMA Sensing® technology Charis sensors are able to discriminate between the residual deposits of foam and product that build up on the sensor itself, and the foam being created in the process.

Effectively the Foam Sensor ignores the inevitable fouling while continuing to monitor the foam. No matter how heavily the Sensor is coated, or how dense and sticky the layer, its unique construction enable it to keep measuring foam throughout the process cycle.

The diagram left shows a Charis sensor coated in a sticky build-up of foam and product. The measuring current which is shown in red on the graphic continues to flow only through the foam. The blue line represents the leakage current driven by the guard electrode. This enable the sensor to function as the leakage is measured separately and not as part of the foam signal.

Often it is not possible to prevent material build-up but our IMA Sensing® technology enables the sensor to function reliably despite extensive coating or fouling. To see a short video demonstration of IMASensing® technology at work please click HERE (opens in another window).
The photographs left show a Braun fermenter which is coated with product. The close-up picture of the sensor (seen arrowed protruding from the headplate) shows it to be completely covered with material but it was still working when the vessel was opened. The user was so astonished that he took a photograph to send us.
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