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SDX15G2

Low cost compensated pressure sensors in DIP package

Sensortechnics GmbH 

SDX Series

Low cost compensated pressure sensors in DIP package

GENERAL DISCUSSION

The SDX 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 absolute device will give a

decreasing output when increasing pressure is applied to the

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.

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 without

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 shift.

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 devices are fully calibrated for offset and span and

should therefore require little user adjustment in most appli-

cations. For more precise span and offset adjustments,

contact the factory.

VACUUM REFERENCE (absolute devices)

Absolute sensors have a hermetically sealed vacuum reference

chamber. The offset voltage on these units is therefore

measured at vacuum, 0 psia. Since all pressure is measured

relative to a vacuum reference, all changes in barometric

pressure or changes in altitude will cause changes in the

device output.

MEDIA COMPATIBILITY

SDX devices are compatible with most non-corrosive gases.

Because the circuitry is coated with a protective silicon gel,

many otherwise corrosive environments can be compatible

with the sensors. Fluids must generally be compatible with

silicon gel, plastic, RTV, silicon, and glass for use with the

gage devices (only). For questions concerning media compati-

bility, contact the factory.

MECHANICAL AND MOUNTING CONSIDERATIONS

The DIP housing is designed for convenient pressure

connection and easy PC board mounting. For pressure attach-

ment tygon and silicon tubing is recommended.

APPLICATION INFORMATION

The application information for the SCX series is also appli-

cable to the SDX series.

ORDERING INFORMATION

Operating

pressure

Order number

Absolute devices

Gage devices

0 - 1 psi

0 - 5 psi

0 - 15 psi

0 - 30 psi

0 - 100 psi

SDX15A2

SDX30A2

SDX100A2

SDX15A4

SDX30A4

SDX100A4

SDX01G2

SDX05G2

SDX15G2

SDX30G2

SDX100G2

Gage/differential

devices

SDX01D4

SDX05D4

SDX15D4

SDX30D4

SDX100D4

SenSym and Sensortechnics reserve the right to make changes to any products herein. SenSym and Sensortechnics 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.

June 2008 / 062

4/4

www.sensortechnics.com

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