Table of Contents
Advertisement
Description
3.3 Theory of operation
3.2
Design
The SITRANS FMS500 is an electromagnetic flow sensor designed to meet the requirements in
ground water, drinking water, waste water, sewage or sludge applications. With its coned
design, increased low-flow accuracy is achieved making it especially useful for leak detection. It
is suitable for direct burial and constant flooding. FMS500 complies with drinking water
approvals.
FMS500 compact version with FMT020 transmitter
(FM520)
The sensors carry a wide range of approvals, see Technical specifications (Page 45).
3.3
Theory of operation
The flow measuring principle is based on Faraday's law of electromagnetic induction.
U
= When an electrical conductor of length L is moved at velocity v, perpendicular to the
i
lines of flux through a magnetic field of strength B, the voltage U
the conductor
U
= L x B x v
i
• U
• L = Conductor length = Inner pipe diameter = k
• B = Magnetic field strength = k
14
= Induced voltage
i
FMS500 remote version
1
2
Operating Instructions, 01/2024, A5E52677520-AA
is induced at the ends of
i
SITRANS FMS500
Advertisement
Table of Contents
