Hycontrol Foam Sensors have been designed specifically to measure foam. Unlike competing products, they are not simply liquid level sensors which have been adapted or modified for this purpose. Crucially, they have the high sensitivity required to measure all types of foam.
Hycontrol Foam Probes utilise a number of different technologies depending on the application and the type of foam. Most foams are aqueous (water-based) but some processes involve organic, chemical or oil-based foams. For example, with aqueous foam we use an impedance measuring principle. This works by passing a small alternating electric current at very low voltage through the foam into the liquid or into the container wall. By measuring the level of the current flowing we can determine if foam is present and measure its density.
Hycontrol’s non-aqueous DiFoam sensor, on the other hand, utilises a high frequency to measure low dielectric constants, enabling it to monitor foam levels where previously this was not possible.
Measuring foam is one thing, but it is also vital to avoid false readings caused by the build-up of foam and other substances on the probe. Hycontrol have created a technology called IMA Sensing® which allows the reliable measurement of foam even when a sensor is covered with a thick sticky layer of fouling.