Level sensors for foam detection
The DiFoam range of sensors and controllers are designed for the measurement and control of non-water based foams. However, they can also be used for level measurement of liquids, but not foam and liquid level together. They provide an efficient, reliable and cost-effective solution for foam control in a diverse collection of industries where the production and control of foam causes a problem.
The system, which comprises a sensor and a controller, was initially designed for the control of foam in a resin manufacturing process for yacht varnish, but has since become a useful tool in measuring and controlling foam in a variety of other applications such as resins, oils, solvents, hydrocarbons and products such as cocoa butter.
The sensor is entered into the material to be measured e.g. a production vessel and then connected to the controller by special cables. The technology operates by measuring the dielectric constant of the material under test. The sensor resonates at a high frequency and responds to changes in the dielectric properties of the surrounding material.
The DiFoam range allows for the accurate control of foam by sensing when the foam reaches an unacceptable level and then signalling the necessary action to reduce or eliminate the foam. This not only increases the efficiency of the process it can increase the throughput of product.
The same technology can also be used to measure liquid levels, but it will not measure both foam and liquid together using a single sensor and controller.
Each sensor is tailored to suit the application. The active part of the sensor is chosen to suit the dielectric constant of the material. The insertion length can be made to the customer's requirements.
DiFoam Control Systems are in use around the world to effectively control non-water based foam in applications as diverse as varnish production, solvents, resins, oil, paint and cocoa butter.