Table of Contents
Advertisement
Technical Reference
A.1 Principles of Operation
The graph was plotted from tests using four ferrous blocks set equidistantly on a 406 mm
(16 inch) diameter circle on a non-ferrous disc.
The physical shape of the ferrous target generally becomes important at low velocities or
large gaps. At these points, tests indicate that a cubic shape gives the best results due to the
sudden change it causes in the magnetic field.
An increase in block size beyond 50 x 50 x 25 mm (2 x 2 x 1 inch) is generally not as effective
as minimizing the gap, except at very low velocities.
Milltronics manufactures probes to suit a wide variety of environments: low temperature,
high temperature, corrosive, and Class I, II, and III applications.
Pre-Amplifier (IMA and RMA)
The pre-amplifier accepts the voltage pulses generated by the probe and converts them into
NPN open collector outputs. The preamplifier comes internally mounted in the probe, or in a
module enclosure for remote mounting.
Internally mounted pre-amplifiers are called IMAs. Remote mounted pre-amplifiers are called
RMAs.
62
Operating Instructions, 11/2021, A5E45090709-AC
SITRANS WM300 MFA
Advertisement
Table of Contents
