Data Sheet for Product

Technical Specification Sheet
Document No. 149-930
November 17, 2016
Siemens Industry, Inc.
Page 1 of 3
Air Differential Pressure Sensors
Description
The Siemens QBM3100 Series Air Differential
Pressure Sensors use ceramic sensing technology to
provide years of maintenance-free measuring
accuracy. They deliver temperature-compensated
sensor signals for registering airflow in HVAC systems
and for measuring differential pressures in
environmental, laboratory, and cleanroom applications.
Features
 Supply voltage 8 to 33 Vdc
 Loop-powered, two-wire, 4 to 20 mA output signal
 Durable high-strength polymer 3/16-inch process
connections for standard push-on tubing
 1/2-inch conduit connection
 Compact construction
 Integral mounting bracket enables the sensor to be
mounted on ductwork or inside a control panel.
 Resettable zero point to compensate for different
mounting positions.
Applications
Individually ranged sensors ensure optimum accuracy
and long-term stability of measurement. The variety of
options means great flexibility not only in climate
control, but also in industrial and medical fine-pressure
measurement.
Compatibility
The QBM 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 monitored pressure 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.
Available Ranges
 -0.25 to 0.25 inches
 0 to 1 inch
 0 to 2.5 inches
 0 to 5 inches
 0 to 10 inches