EDDY CURRENT BASED LEVEL MEASUREMENT
FOR SLABS

EDDY CURRENT BASED LEVEL MEASUREMENT FOR SLABS

The use of electromagnetic sensors for mould level measurement in continuous casting of steel is a worldwide common practice. Level stability, smooth regulation and fast response time are all features that improve process control and steel surface quality.

The eddy current based measuring system developed by Berthold Technologies in cooperation with Ergolines, is used for real-time monitoring of mould level in the continuous casting process. The eddy current technology has proven to be a reliable and precise measuring method - especially in slab casting applications. Mould level measurement with ECcast is not affected by the use of casting powder. It can be used as stand-alone system or in combination with radiometric measurement technology to provide you with additional information on your process.

The Advantages:

• Accurate and reliable;
• No nuclear sources required;
• Electromagnetic compatibility;
• Easy handling and installation;
• Long-life design.

Measuring principle: The coil within the ECcast sensor generates an electromagnetic field, penetrating deep into the mould. As a result eddy currents are induced in the top layer of the steel. These eddy currents in turn generate a counteracting electromagnetic field at the sensor, its strength is directly proportional to the distance between the steel surface and the coil.
Thus the liquid steel level can be determined very accurately, independently of mould powder or slag.