Stack ST747 User Information

ST747 0-10 Bar / 150 PSI

PRESSURE SENSOR (1/8 NPTF)

USER INFORMATION

(ST541047-004)

Stack Limited, Wedgwood Road, Bicester, Oxfordshire, OX26 4UL, England.

Tel.[phone] Fax [phone]

INSTALLATION

It is essential to ensure that these devices are NOT mounted in a position,
which is close to any devices, or associated wiring, similar to the following:

Suggested Wiring Clearances Min space ST747
Ignition HT & coil leads 75mm (3”)
Radio transmitters 50mm (2”)
Fast switching inductive loads like

50mm (2”)
fuel injectors, hydraulic solenoids.
Any powerful source of heat Shield with reflective

material

Although it is possible to mount the sensors directly to the engine
block, if the engine vibration is excessive, it is recommended that they
are mounted indirectly, if possible, using flexible connections.

All STACK pressure sensors will withstand an over-pressure of only double
their working maximum. Therefore, it is recommended that they be
connected via an in-line pressure restrictor to eliminate the possibility of
damage from any short high-pressure pulses, which may exist. If an
adaptor is required to enable mounting of the transmitter it is possible to
incorporate the restrictor into this part. The restriction should take the form
of a 1mm diameter x 25mm long hole.

These terminals must be connected to the corresponding terminals of the
selected input channel.

Pin Number Signal Description
1 Output from sensor

2 5v supply voltage

3 No connection
40v

ST747 TECHNICAL SPECIFICATION

Range 10 Bar
Over-range 20 Bar
Resolution 100 mB
Accuracy 2%
Accuracy/Temp 3%
Output Voltage 0.5 – 4.5 volts
Working Temp -30 to +120 Degrees Centigrade
Storage Temp -40 to +140 Degrees Centigrade
Vibration 15G (33.3 to 200 Hz)
Pressure Port 1/8” NPTF Male

Sensor Connections

Sensors connect into Stack Systems via a four way, Mini Sure Seal (MSS)
connector. The following polarity is observed in all cases:

= Pin

= Socket

Plug
Harness End

12

34

Socket
Sensor End

12

34

Sealing IP65

ST747 - User Manual (ST541047)