2640 pages

Model 264
GUARANTEED

3 DAY
NT
SHIPMEPARTS
ARD
FOR STAND

Applications

Very Low Differential Pressure Transducer

ces)

(less than 10 pie

● Heating, Ventilating and

Unidirectional Ranges: 0 - 0.1 to 0 - 100 in. W.C.
Bidirectional Ranges: 0 - ±0.5 to 0 - ±50 in. W.C.
Air or Non-Conducting Gas

Air Conditioning (HVAC)
● Energy Management

Un 3-ye
co
n ar
Wa ditio
rra
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nty al

Systems
● Variable Air Volume and

Fan Control (VAV)
● Environmental Pollution

Control
● Lab and Fume Hood Control
● Oven Pressurization and

Furnace Draft Controls

Features
■ Up to 10 PSI Overpressure

(Range Dependent)
■ Installation Time

Minimized with Snap Track
Mounting and Easy- ToAccess Pressure Ports and
Electrical Connections

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etra Systems 264 pressure transducers sense differential or gauge (static)
pressure and convert this pressure
difference to a proportional electrical output for either unidirectional or bidirectional
pressure ranges. The 264 Series is offered
with a high level analog 0 to 5 VDC or 4 to
20 mA output.
Used in Building Energy Management
Systems, these transducers are capable of
measuring pressures and ows with the
accuracy necessary for proper building
pressurization and air ow control.
The 264 Series transducers are available for
air pressure ranges as low as 0.1 in. W.C. full
scale to 100 in. W.C. full scale. Static standard
accuracy is ±1.0% full scale in normal ambient
temperature environments, but higher
accuracies are available. The units are
temperature compensated to 0.033% FS/oF
thermal error over the temperature range of
0oF to +150oF.

■ 0 to 5 VDC or 2-wire 4 to

The Model 264 utilizes 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
Setra’s unique electronic circuit.
The tensioned sensor allows up to 10 PSI
overpressure (range dependent) with no
damage to the unit. In addition, the parts that
make up the sensor have thermally matched
coefficients, which promote improved
temperature performance and excellent long
term stability.

20 mA Analog Outputs Are
Compatible with Energy
Management Systems
■ Reverse Wiring Protection
■ Internal Regulation Permits

Use with Unregulated DC
Power Supplies
■ Fire Retardent Case

(UL 94 V-0 Approved)
■ Meets CE Conformance

Standards

When it comes to a product to
rely on - choose the Model 264.
When it comes to a company to
trust - choose Setra.

Visit Setra Online:
http://www.setra.com
NOTE: Setra quality standards are based on ANSI-Z540-1.
The calibration of this product is NIST traceable.
U.S. Patent nos. 4093915; 4358814; 4434203; 6019002; 6014800.
Other Patents Pending.

159 Swanson Rd., Boxborough, MA 01719/Telephone: 978-263-1400/Fax: 978-264-0292

800-257-3872