Table of Contents
Advertisement
Industrial Gaussmeter IGM11 Operating Instructions
Chapter 3 Function of the Gaussmeter
3 Function of the Gaussmeter
3.1 The Hall Effect
3.1.1 Linear Properties of the Hall Probe
The measurement is based on the deflection of charge carriers in a magnetic field
inside a conductor. Thus, the basis of the measurement of the magnetic flux density is
the Lorentz force. If you apply voltage between the beginning and the end of a flat
electrical conductor, the charge carriers move with a rate of
represents the charge carrier mobility inside the conductor. Due to their high
µ
n
mobility, the charge carriers are always electrons. In a displacement by 90° to the
current direction, you can tap a voltage which is ideally proportional to the magnetic
flux density. Only the part of the flux density becomes effective which runs
perpendicular through the flat side of the conductor.
If you do not extract any current from the electrodes S1 and S2, but only measure the
voltage, the following applies:
B
S2
C1
Figure 2 Basic Assembly of a Hall Probe
C2
S1
U
I
Hall
n
e
⋅
⋅
=
⋅
e
w
w
t
⋅
magne t
MAGSYS
systeme
r
, whereby
v
r
E
= µ
⋅
Drift
n
e
B
Page 11 / 106
Advertisement
Table of Contents
