ABB AT100 Magnetostrictive Level Transmitter, High accuracy magnetostrictive transmitter for liquid level and interface measurement with optional temperature measurement.

The AT100 is Based Upon the Magnetostrictive Principle. The Sensing Tube Contains a Wire, which is Pulsed at Fixed Time Intervals and the Interaction of the Current Pulse with the Magnetic Field Created by the Magnetic Float. 

Overview

This Causes a Torsional Stress Wave to be Induced in the Wire. This Torsion Propagates Along the Wire at a Known Velocity from the Position of the Magnetic Float and Toward Both Ends of the Wire. A Patented Piezo-Magnetic Sensing Element Placed in the Transmitter Assembly Converts the Received Mechanical Torsion into an Electrical Return Pulse. The Microprocessor-Based Electronics Measures the Elapsed Time Between the Start and Return Pulses and Converts it into a 4-20 mA Output, which is Proportional to the Level Being Measured.

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