SDX...IND4 Series
Compensated pressure sensors in DIP package
1/4December 2002 / 551
Aubinger Weg 27, 82178 Puchheim, Germany
Phone: +49 (0)89 80083-0, Fax: +49 (0)89 80083-33
http://www.sensortechnics.com
FEATURES
·0...5 and 0...10 "H2O
·Low cost DIP
·Temperature compensated
·Calibrated zero and span
·Small size
·Low noise
·High impedance for
low power applications
APPLICATIONS
·Medical equipment
·Computer peripherals
·Pneumatic controls
·HVAC
EQUIVALENT CIRCUIT
Scale: 1 cm
½ inch
ELECTRICAL CONNECTION
Top view
Note: The polarity identicated is for pressure applied to backward gage.
GENERAL DESCRIPTION
The SDX...IND4 sensors will provide
a very cost effective solution for
pressure applications that require
small size plus performance. These
calibrated and temperature compen-
sated sensors give an accurate and
stable output over a 0°C to 50°C tem-
perature range. This series is inten-
ded for use with non-corrosive, non-
ionic working fluids such as air, dry
gases and the like.
The SDX...IND4 devices are speci-
fically designed to measure low
pressures. They feature a 0 to 5 or 0
to 10 "H2O full scale range.
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.
The SDX...IND4 devices feature an
integrated circuit sensor element and
laser trimmed thick film ceramic
housed in a compact solvent resistant
case. The package is a double wide
(i.e., 0.600" lead spacing) dual-inline-
package. This is the same familiar
package used by IC manufacturers
except that is has a pressure port(s).
The PC board area used by each DIP
is approximately 0.26 square inches.
This extremely small size enables the
use of multiple sensors in limited
available space. The DIP provides
excellent corrosion resistance and
isolation to external package stress.
The DIP mounts on a PC board like a
standard IC with through-hole pins.
The pins anchor the pressure sensor
to the PC board and provide a more
secure and stable unit than other
types of packages.
+out
V
-out
P1
GND
out -
1
out +
4
+Vs
P2
SDX...IND4 Series
Compensated pressure sensors in DIP package
2/4 December 2002 / 551
Aubinger Weg 27, 82178 Puchheim, Germany
Phone: +49 (0)89 80083-0, Fax: +49 (0)89 80083-33
http://www.sensortechnics.com
PERFORMANCE CHARACTERISTICS1
Specification notes:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Reference conditions (unless otherwise noted): supply voltage, VS = 12VDC; TA = 25°C; common mode line pressure = 0 psig;
pressure applied to port 2.
Span is the algebraic difference between the output voltage at full scale pressure and the output at zero pressure. Span is ratiometric
to the supply voltage.
Hysteresis is the maximum output difference at any point within the operating pressure range for increasing and decreasing pressure.
Maximum error band of the offset voltage and the error band of the span, relative to the 25°C regarding.
Difference in output at any pressure with the operating pressure range and temperature within 0°C to +50°C after:
a) 100 temperature cycles, 0°C to +50°C.
b) 1.0 million pressure cycles, 0 psi to full scale span.
Input impedance is the impedance between VS and ground.
Output impedance is the impedance between the + and - outputs.
This is the common mode voltage of the output arms for VS = 12 VDC.
Response time for a 0 psi to full scale span pressure step change, 10 % to 90 % rise time.
Long term stability over a one year period.
PRESSURE SENSOR CHARACTERISTICS (all devices)
Maximum ratings
Supply voltage VS+20 VDC
Lead temperature (soldering 4 sec.) 250°C
Environmental specifications
Temperature ranges
Compensated 0°C to 50°C
Operating -20°C to +85°C
Storage -40°C to +125°C
Humidity limits (non condensing) 0 to 95% RH
Characteristics Min. Typ. Max. Unit
Zero pressure offset -1.0 0±1.0
mVFull scale span2SDX005IND4
SDX010IND4
19.5
24.5
20.0
25.0
20.5
25.5
Temp. effects (0°C to 50°C)4Offset --- ±0.2 ±0.6
Span --- ±0.4 ±2.0 %FSO
Combined linearity and hysteresis3--- ±0.2 ±1.0
Repeatability5--- ±0.1 --- mV
Long term stability of offset and span10 --- ±0.1 ---
Response time9--- 100 --- µs
Input impedance6--- 4.0 --- kΩ
Output impedance7--- 4.0 ---
Common mode voltage81.5 3.0 5.0 V
DC
STANDARD PRESSURE RANGES
Part number
SDX005IND4
SDX010IND4
Operating pressure
0...5 "H2O
0...10 "H2O
Proof pressure
200 "H2O
200 "H2O
Burst pressure
7 psi
7 psi
Common mode
pressure
50 psig
50 psig
SDX...IND4 Series
Compensated pressure sensors in DIP package
3/4December 2002 / 551
Aubinger Weg 27, 82178 Puchheim, Germany
Phone: +49 (0)89 80083-0, Fax: +49 (0)89 80083-33
http://www.sensortechnics.com
PHYSICAL DIMENSIONS
D4-housing
mass: 2 g dimensions in inches (mm)
GENERAL DISCUSSION
The SDX...IND4 series devices give a voltage output which is directly proportional to applied pressure. The gage
devices will give an increasing positive going output when increasing pressure is applied to the pressure port. The
devices are ratiometric to the supply voltage and changes in the supply voltage will cause proportional changes in
the offset voltage and full scale span.
.430
(10.92) typ.
.300
(7.62)
.500 (15.24) typ.
.470 (11.94)
1
4
SENSYM
P1
.550 (13.97)
Ø .090
(2.29) typ.
.100 (2.54) typ.
.020
(0.51) typ.
compensation
circuit
.010
(.25) typ.
.120
(3.05) typ.
.335
(8.50) typ.
.110
(2.79) typ.
SDX...IND4 Series
Compensated pressure sensors in DIP package
4/4 December 2002 / 551
Aubinger Weg 27, 82178 Puchheim, Germany
Phone: +49 (0)89 80083-0, Fax: +49 (0)89 80083-33
http://www.sensortechnics.com
Sensortechnics and Sensym reserve the to make changes to any products herein. Sensortechnics and Sensym do not assume any liability
arising out of the application or use of any product or circuit described herein, neither does it convey any license under its patent rights nor the
rights of others.
PNEUMATIC INTERFACE
The DIP also provides convenient mounting and pressure ports for ease of use with standard 1/16" ID, 1/8" OD,
1/32" wall, flexible plastic tubing for pressure connection.
The small tubing has several advantages over larger tubing commonly used with pressure sensors:
1) The tubing can be formed in a much smaller radius with-out kinking.
2) The tubing is easier to handle.
3) The tubing is available in a variety of colors such as clear, white, yellow, blue, green, etc. to enable color coding
of pneumatic circuits with multiple pressure sensors in the same way that wiring harnesses are color coded in
electrical circuits. This greatly simplifies troubleshooting.
4) Less stress is placed on the pressure sensor package resulting in less potential for offset shifts.
5) Less physical space is required for the small tubing.
6) The lower volume of air in the small tubing results in faster pressure sensor response.
USER CALIBRATION
The SDX...IND4 devices are fully calibrated for offset and span and should therefore require little user adjustment
in most applications. For more precise span and offset adjustments, contact the factory.
MEDIA COMPATIBILITY
SDX...IND4 devices are compatible with most non-corrosive gases. For questions concerning media compatibility,
contact the factory.
APPLICATION INFORMATION
Application information found in the section "Application Notes" and on the SCX series data sheet in the
"Sensortechnics pressure sensors, transducers and transmitters handbook".
ORDERING INFORMATION
Pressure range Differential / Gage
0 - 5 "H2OSDX005IND4
0 - 10 "H2OSDX010IND4
