Data Sheet for Product

Technical Specification Sheet
Document No. 149-957
February 9, 2010
Siemens Building Technologies, Inc. Page 1 of 3
Very Low Differential Pressure Transducer
Figure 1. Very Low Differential Pressure Transducer
Description
The Very Low Differential Pressure Transducers sense
differential or guage (static) pressures and convert
pressure difference to a proportional electrical output.
The 590 Series is offered with a 0 to 10 Vdc or 4 to
20 mA output.
Used in Building Energy Management Systems, these
transducers are capable of measuring pressures with
the accuracy necessary for proper building
pressurization and airflow control.
The 590 Series Transducers are available in five (5)
different air pressure ranges. Static accuracy is ±1%
full scale in normal ambient temperature environments.
The units are temperature compensated to less than
±0.033% FS/°F of thermal error over the temperature
range of 0°F to +150°F.
The 590 Series uses an improved all stainless steel
micro-tig welded sensor.
The tensioned stainless steel diaphragm and insulated
stainless steel electrode, positioned close to the
diaphragm, form a variable capacitor. Positive
pressure moves the diaphragm toward the electrode,
increasing the capacitance.
A decrease in pressure moves the diaphragm away
from the electrode, decreasing the capacitance. The
change in capacitance is detected and converted to a
linear DC electrical signal by the unique electronic
circuit of the 590 Series.
The micro-tig-welded tension sensor allows up to 10
PSI overpressure (in either direction) with no damage
to the unit. In addition, the sensor parts have thermally
matched coefficients, which promotes improved
temperature performance and excellent long-term
stability.
Applications
• Heating, Ventilation and Air Conditioning (HVAC)
• Energy Management Systems
• Variable Air Volume (VAV) and Fan Control
• Environmental pollution control
• Static duct and clean room pressures
Benefits
• 10 psi proof pressure on all ranges.
• 24 Vac excitation.
• 0 to 10 Vdc and 4 to 20 mA analog output is
compatible with all energy management systems.
• Fully protected against reverse wiring.
• Internal regulation permits use with unregulated
DC power supplies.
• 1% accuracy improves variable air volume system
performance.
• Meets CE conformance standards.
• No field calibration or adjustment necessary.