www.kamansensors.com
30
PART NO: 860029-001
Last Revised 01/06/15
Relative Sensitivity:
The relative sensitivity is a way of comparing the expected resolution of
the system. The relative sensitivity is computed such that a system with a relative sensitivity of
1 would have resolution of 0.005%FR peak-to-peak when measured at a 1 kHz bandwidth with
the sensors positioned at the extreme end of the measuring range. The resolution at null is
generally better by a factor of 3. A relative sensitivity of 0.5 would effectively double the noise in
the system and the temperature coefficient in the electronics as a percent of the measuring
range (i.e. 1 is good, 0.5 is not as good).
This also affects the temperature coefficient of the electronics in the same relative manner. At a
relative sensitivity of 1, the electronics has a temperature coefficient of approximately
0.01 to
0.02%FR/
o
C (typically).
Relative Sensitivity is optimum around 35% of the measuring range for the following reasons:
At large ranges the output change remains constant while the range is increasing. This
sensitivity number would obviously have a limit at ‘0’ as the range increased to infinity.
At small ranges the output change is diminishing faster than the range is decreasing resulting in
a net loss of sensitivity as a percentage of the measuring range.
Estimated Relative Sensitivity of KD5100
0.00
0.20
0.40
0.60
0.80
1.00
1.20
0%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Full Range as % of Coil Diameter
R
e
la
ti
v
e
S
e
n
s
it
iv
it
y
