3 / 4 page
SLP004D
Low pressure sensors
3/4
July 2005 / 046
www.sensortechnics.com
General Information
The SLP family of pressure sensors function
as a wheatstone bridge. When pressure
applied to the device the resistors in the
arms of the bridge change as shown in
Figure 1.
The resulting differential output voltage, V
0,
is easily shown to by V
0 = VB x ∆R. Since
the change in resistance is directly propor-
tional to pressure, V
0 can be written as:
V
0 = S x P x VB + VOS
TYPICAL PERFORMANCE CHARACTERISTICS
where:
V
0
is the output voltage in mV
S
is the sensitivity in mV/V psi
P
is the pressure in psi
V
B
is the bridge voltage in volts
V
OS
is the offset error
(the differential output voltage when
the applied pressure is zero).
For a complete application discussion see
SenSym´s SCC series datasheet.
Figure I
APPLICATION INFORMATION
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