SCX Series
Precision compensated pressure sensors
GENERAL DESCRIPTION
FEATURES
The SCX series sensors will provide a very
cost effective solution for pressure
applications that require high accuracy over
a wide temperature range. These internally
calibrated and temperature compensated
sensors were specifically designed to
provide an accurate and stable output over
a 0°C to 70°C temperature range. This series
is intended for use with non-corrosive, non-
ionic working fluids such as air, dry gases,
and the like.
· 0...1 to 0...150 psi
· Precision temperature
compensation
· Calibrated zero and span
· Small size
· Low noise
Devices are available to measure absolute,
differential, and gage pressures from 1 psi
(SCX01) up to 150 psi (SCX150). The abso-
lute (A) devices have an internal vacuum
reference and an output voltage propor-
tional to absolute pressure. The differential
(D) devices allow application of pressure
to either side of the pressure sensing
diaphragm and can be used for gage or
differential pressure measurements.
· High accuracy
Scale:
1 cm
· High impedance for
low power applications
½ inch
conditioning circuitry. If the application
requires extended temperature range
operation, beyond 0 to 70°C, two pins which
provide an output voltage proportional to
temperature are available for use with
external circuitry.
APPLICATIONS
· Medical equipment
· Barometry
The SCX devices feature an integrated cir-
cuit sensor element and laser trimmed thick
film ceramic housed in a compact nylon
case. This package provides excellent
corrosion resistance and provides isolation
to external package stresses. The package
has convenient mounting holes and pres-
sure ports for ease of use with standard
plastic tubing for pressure connection.
The output of the bridge is ratiometric to the
supply voltage and operation from any D.C.
supply voltage up to +20 V is acceptable.
· Computer peripherals
· Pneumatic control
· HVAC
Because these devices have very low
noise and excellent temperature compen-
sation, they are ideal for medical and other
high performance applications. The 100
microsecond response time also makes this
series an excellent choice for computer peri-
pherals and pneumatic control applications.
All SCX devices are calibrated for span to
within ±1 % and provide a very low zero
pressure output of ±300 microvolts
maximum. Thus, for many applications no
trimming networks are required in the signal
EQUIVALENT CIRCUIT
ELECTRICAL CONNECTION
2
Vs
Pin 1) Temperature output (+)
Pin 2) VS
Pin 3) Output (+)
Pin 4) Ground
1
Pin 5) Output (-)
Pin 6) Temperature output (-)
1 2 3 4 5 6
3
5
Bottom view
6
Note: The polarity indicated is for pressure applied to port B
(for absolute devices pressure is applied to port A
and the output polarity is reversed.)
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