Inline analyser system for edible oil and fat processing.

Optiquad-EOF 4050 W, from Krohne,  measures directly in the pipe: analysis is achieved via an optical window mounted in a standard Varinline measuring section. The readings of FFA, TPM, POV moisture or dirt are provided instantly for process control or dynamic control loops via four 4...20 mA outputs. Depending on the application, measurement of anisidine value (AV) and iodine value (IV) are possible.

Compared to conventional laboratory methods used to obtain these values, Optiquad-EOF 4050 W reduces the need for sampling, sample transport and handling, and the associated sources of error and costs.

The optical spectroscopy analyzing method allows for a wide range of use in edible oil applications, such as oil extraction, oil refinement and frying processes up to oil recycling, as well as fat processing. For example, the continuous inline measurement of FFA content in frying oil helps to minimize the addition of fresh oil: the FFA value can be kept below a defined limit whilst allowing to maintain a high level of quality. It also provides a wide measuring range, e.g. 0…98% for FFA, and an accuracy of RMSEp: ±0,03% up to ± 1% FFA, depending on the measurement range.

Optiquad-EOF 4050 W spectroscopic analysis system consists of the analyser unit (protection rating IP65/NEMA4X) and the operating unit, an industrial PC with touch screen display for parameterisation and automatic calibration in a stainless steel housing (IP65/NEMA4X), optionally built into a switch cabinet. It uses up to four measuring methods (transmission, scattering, fluorescence and refraction) with up to 12 wavelengths from ultraviolet to infrared. The underlying calibration is calculated automatically from reference data specific to the application. Optiquad-EOF 4050 W is the successor of Optiquad-FFA 4050 W.

• Krohne products are marketed in Ireland through DWN Instrumentation.

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