Installation Instructions

Installation Instructions
Document No. 129-901
July 3, 2012
Wet Differential Pressure Sensors
Item Number 129-901, Rev. BA Page 1 of 3
Product Description
The Siemens QBE Series Wet Differential Pressure
Sensors utilize a well-proven ceramic technology
making them an ideal choice across a broad
spectrum of applications.
Product Numbers
Product
Number
Operating
Differential
Pressure
Rating
(psi)
Max.
Differential
Pressure
Between
High &
Low Ports
(psi)
Burst
Pressure
(psi)
QBE3100UD25
0 to 25 72
QBE3100UD50
0 to 50 116
QBE3100UD100
0 to 100 290
540
Pressure Rating
CAUTION:
• The maximum manifold pressure rating
is 250 psi.
• Exceeding the maximum differential
pressure will damage the sensor.
Warning/Caution Notations
WARNING:
Personal injury/loss of life may
occur if you do not follow the
procedures as specified.
CAUTION:
Equipment damage or loss of
data may occur if you do not
follow the procedures as
specified.
Contents
• Sensor
• Rubber gasket
• Conduit plug with cable gland
• 90° mounting bracket and mounting screws
Required Tools
• Thread Sealant
• (2) open-ended wrenches or
(4) crescent wrenches: 1/2”, 5/8", 11/16",
and 9/16”
• Small, Phillips screwdriver
• Small, flat-blade screwdriver
Installation Time
30 minutes
Prerequisites
• Use two male connector compression
fittings with 1/4”-18 NPT threads rated for
system pressure for the HIGH and LOW
pressure ports of the sensor (not included).
• Prepare the fittings with Loctite 565 Thread
Sealant or equivalent anaerobic liquid to
prevent leakage.
CAUTION:
Do not use putty, gasket-type
material, or tape.
Installation
Installing the Sensor
1. Assemble compression fittings to the sensor
finger-tight, and then tighten a minimum 2 to 3
turns with 5/8” wrench or to a maximum 25 ft-lbs
(34 Nm) while holding the sensor fitting with the
11/16" wrench. See
Figure 1.
Sensor
Fitting
SEN0642R1
Do Not
Open
Compression Fittings
(Not Included)
Figure 1. Sensor Fitting Location.