Patent ID: 11946740
Assignee: ELCOMETER LIMITED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A coating thickness measuring instrument comprising:
a magnetic induction probe comprising at least one drive coil and at least one pick-up coil;
a driver for driving an alternating drive current in the or each drive coil and comprising a first modulator configured to scale the drive current in the or each drive coil according to a first scaling factor;
a detector for detecting an output of the or each pick-up coil;
a second modulator configured to scale an output of the detector according to a second scaling factor; and
a processor configured to: apply a transfer function to an output of the second modulator to produce an instrument output corresponding to a measured coating thickness; and change both the first and second scaling factors simultaneously based on the instrument output.