Data Sheet for Product

Technical Specification Sheet
Document No. 149-929
June 21, 2012
Siemens Industry, Inc. Page 1 of 5
Wet Differential Pressure Sensor
with Optional Manifold Assembly
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. These sensors can be ordered
individually or pre-assembled with an optional three-
valve manifold.
Features
• Supply voltage 7.5 to 33 Vdc
• Loop powered 4 to 20 mA output signal
• 1/4-inch NPT process connections
• 1/2-inch conduit connection with adapters for
installations not using conduit
• Compatible with water and water/glycol mixtures
Applications
The QBE Sensor is particularly suitable for use in
HVAC systems where continuous monitoring of flow
rate or differential pressure across a control valve is
required.
Compatibility
The QBE Series Differential Pressure Sensors are
compatible with most devices or systems capable of
powering and processing a DC 4 to 20 mA output
signal.
Technology
The pressure to be monitored acts on a ceramic
sensor element. The ceramic element has the
following significant advantages
• Very low susceptibility to temperature
• Resistance to high temperature
• No mechanical aging or creepage
The sensor signal is linearized, temperature-
compensated and amplified by the sensor electronics.