
39-1
Magnetic eld strength is measured using a variety of dierent technologies. Each technique has unique
pr
operties
th
at
ma
ke
it mo
re
su
itable
fo
r
pa
rticular
ap
plications
. e
se
ap
plications
ca
n
ra
nge
fr
om
sim
-
ply
se
nsing
th
e
pr
esence
or ch
ange
in th
e
e
ld
to th
e
pr
ecise
me
asurements
of a ma
gnetic
e
ld’s
sc
alar
an
d
ve
ctor
pr
operties
. A ve
ry
go
od
an
d
ex
haustive
fu
ndamental
de
scription
of bo
th
me
chanical
an
d
el
ectrical
me
ans
fo
r
se
nsing
ma
gnetic
e
lds
ca
n
be fo
und
in Li
on
[1
];
le
ss
de
tailed
bu
t
mo
re
up
-to-date
surveys of magnetic sensor technologies can be found in [2,3]. It is not possible to adequately describe
all of these technologies i