The EMLI III Tundish level measurement system is a robust unit that reliably and consistently measures the level of the liquid metal in a continuous caster tundish.  The system provides a constant, real-time, level output for monitoring or automatic level control.

The system utilizes two sensors that are mounted between the metal tundish shell and the refractory lining.  These sensors have been designed for long life and can easily last from one tundish relining to the next.

An IMPORTANT feature of the EMLI III version of the tundish system is the ability to accurately measure the tundish metal level to the BOTTOM of the tundish.  This allows the user to achieve maximum metal yield while assuring that no slag enters the continuous caster mold.

As mentioned previously, the EMLI III tundish level measurement system utilizes two sensors.  One sensor is designated the transmitter and the other is designated the receiver.  The sensors are usually placed opposite each other in the tundish vessel.   

The transmitter sensor is excited with a AC current.  This causes the transmitter to emit an electromagnetic field.  This field is direct coupled to the receiver sensor.

When the metal level in the tundish is low, the electromagnetic field has a clear path to the receiver sensor and a strong received signal is detected.

When the metal level in the tundish is high, a portion of the electromagnetic field is shielded from the receiver sensor and the received signal is reduced.

This manner of level measurement produces an output signal that is directly proportional to the level of metal in the tundish.

It is important to note that the presence of slag on top of the metal has no affect on the EMLI III measurement system.  The system provides the actual metal level regarding of slag content in the tundish.