Johnson Controls DPT 264 Catalog Page

Very Low Differential Pressure Transducer

HIGH OVERPRESSURE

CAPABILITY

Up to10 PSI

Model DPT 264

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

3-year

Unconditional

Warranty

Applications

● Heating, Ventilating and

Air Conditioning (HVAC)

● Energy Management

Systems

● Variable Air Volume and

Fan Control (VAV)

● Environmental Pollution

Control

● Lab and Fume Hood Control

●Oven Pressurization and

Furnace Draft Controls

Features

■ Installation Time

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

■ 0 to 5 VDC or 2-wire 4 to

20 mA Analog Outputs Are
Compatible with Energy
Management Systems

etra Systems 264 pressure transduc­ers sense differential or gauge (static)

S

pres sure 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 flows with the
accuracy necessary for proper building
pressurization and air flow 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.

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.

■ Reverse Wiring Protection

■ Internal Regulation Permits

Use with Unregulated DC
Power Supplies

■ Fire Retardent Case

(UL 94 V-0 Approved)

■ Meets CE Conformance

Standards

NOTE: Setra quality standards are based on ANSI-Z540-1.
The calibration of this product is NIST traceable.

U.S. Patent nos. 6019002; 6014800

IS O -90 01 Cer tifi ed

Performance Data

Standard Optional
Accuracy* RSS(at constant temp) ±1.0% FS ±0.5% FS ±0.25% FS
Non-Linearity, BFSL

±0.96% FS ±0.38% FS

±0.22% FS

Hysteresis 0.10% FS 0.10% FS 0.10% FS
Non-Repeatability 0.05% FS 0.05% FS 0.05%FS

Thermal Effects**
Compensated Range °F(°C) 0 to +150 (-18 to +65)
Zero/Span Shift %FS/°F(°C) 0.033 (0.06)
Maximum Line Pressure 10 psi
Overpressure (Range Dependant) Up to 10 psi
(Range Dependent)
Long Term Stability 0.5% FS/1 YR

Zero Offset

Position Effect Range (%FS/G)
(Unit is factory calibrated at 0g To 0.5 in. WC 0.60
effect in the vertical position.) To 1.0 in. WC 0.50
To 2.5 in. WC 0.22

To 5 in. WC 0.14

* RSS of Non-Linearity, Hysteresis, and Non-Repeatability.
**Units calibrated at nominal 70˚F. Maximum thermal error computed from
this datum.

Outline Drawings

Code T1 Electrical Termination Dimensions

#6 SCREW WIRE CLAMP 3 PLACES

2.750

69.85

1.662

42.21

0.594

15.08

1.811

45.99

1.624

41.25

1.187

30.15

4.562

115.87

5.062

128.57

PRESSURE PORTS

Model 264 Specifications

Environmental Data

Temperature
Operating* °F (°C) 0 to +175 (-18 to +79)

Storage °F (°C) -65 to +250 (-54 to +121)

*Operating temperature limits of the electronics only. Pressure media
temperatures may be considerably higher.

Physical Description

Case Fire-Retardant Glass Filled
Polyester (UL 94 V-0 Approved)
Mounting Four screw holes on removable
zinc plated steel base (designed
for 2.75” snap track)
Electrical Connection Screw Terminal Strip
Pressure Fittings 3/16” O.D. barbed brass
pressure fitting for 1/4” push-on
tubing
Zero and Span Adjustments Accessible on top of case

Weight (approx.) 10 ounces

Pressure Media

Typically air or similar non-conducting gases.

Specifications subject to change without notice.

Optional 1/2” Conduit Electrical Enclosure Dimensions

0.078

1.98

0.312

7.92

0.385

9.78

3.00

IN

MM

76.20

ORDERING INFORMATION

1.19

30.15

1.19

30.15

4.56

115.87

5.51

139.83

Electrical Data (Voltage)

Circuit 3-Wire (Com, Exc, Out)
Excitation 9 to 30 VDC
Output* 0 to 5 VDC**
Bidirectional output at zero
pressure: 2.5 VDC
Output Impedance 100 ohms

*Calibrated into a 50K ohm load, operable into a 5000 ohm load or greater.
**Zero output factory set to within ±50mV (±25 mV for optional accuracies).
**Span (Full Scale) output factory set to within ±50mV. (±25 mV for
optional accuracies).

**

Electrical Data (Current)

Circuit 2-Wire
Output* 4 to 20mA
Bidirectional output at zero
pressure: 12mA
External Load 0 to 800 ohms
Minimum supply voltage (VDC) = 9+ 0.02 x
(Resistance of receiver plus line).
Maximum supply voltage (VDC) = 30+ 0.004 x

(Resistance of receiver plus line).

*Calibrated at factory with a 24 VDC loop supply voltage and a 250 ohm load.
**Zero output factory set to within ±0.16mA (±0.08 mA for optional
accuracies).
**Span (Full Scale) output factory set to wtihin ±0.16mA (±0.08 mA for
optional accuracies).

0.49

12.55

1.91

1.66

48.51

42.21

1.50

38.10

**

**

PRESSURE PORTS

IN

MM

0.99

25.17

SSP264 Rev.I 04/25/2011

Input Range (Inches
of WC)

0 to 0.1

0 to 0.25

0 to 0.5

0 to 1

0 to 2.5

0 to 5
0 to 10
0 to 25
0 to 50

0 to 100

-0.1 to 0.1

-0.25 to 0.25

-0.5 to 0.5

-1 to 1

-2.5 to 2.5

-5 to 5

Add DPT-CAL-CERT for Calibration Certificate. Note: All units provided with Calibration Certificate

While we provide application assistance on all Setra products, both personally and
through our literature, it is the customer ’s responsibility to determine the suitability
of the product in the application.

Product Codes for Accuracy Product Codes for 0.5% Accuracy Product Codes for 0.25% Accuracy

0 to 5 VDC Output 4 to 20 mA 0 to 5 VDC Output 4 to 20 mA 0 to 5 VDC Output 4 to 20 mA

DPT2640-0R1D-1
DPT2640-R25D-1
DPT2640-0R5D-1
DPT2640-001D-1
DPT2640-2R5D-1
DPT2640-005D-1
DPT2640-010D-1
DPT2640-025D-1
DPT2640-050D-1
DPT2640-100D-1
DPT2640-0R1B-1
DPT2640-R25B-1
DPT2640-0R5B-1
DPT2640-001B-1
DPT2640-2R5B-1
DPT2640-005B-1

DPT2641-0R1D-1
DPT2641-R25D-1
DPT2641-0R5D-1
DPT2641-001D-1
DPT2641-2R5D-1
DPT2641-005D-1
DPT2641-010D-1
DPT2641-025D-1
DPT2641-050D-1
DPT2641-100D-1
DPT2641-0R1B-1
DPT2641-R25B-1
DPT2641-0R5B-1
DPT2641-001B-1
DPT2641-2R5B-1
DPT2641-005B-1

DTP2640-0R1D
DPT2640-R25D
DPT2640-0R5D
DPT2640-001D
DPT2640-2R5D
DPT2640-005D
DPT2640-010D
DPT2640-025D
DPT2640-050D
DPT2640-100D
DPT2640-0R1B
DPT2640-R25B
DPT2640-0R5B
DPT2640-001B
DPT2640-2R5B
DPT2640-005B

DPT2641-0R1D
DPT2641-R25D
DPT2641-0R5D
DPT2641-001D
DPT2641-2R5D
DPT2641-005D
DPT2641-010D
DPT2641-025D
DPT2641-050D
DPT2641-100D
DPT2641-0R1B
DPT2641-R25B
DPT2641-0R5B
DPT2641-001B
DPT2641-2R5B
DPT2641-005B

DPT2640-0R1D-A
DPT2640-R25D-A
DPT2640-0R5D-A
DPT2640-001D-A
DPT2640-2R5D-A
DPT2640-005D-A
DPT2640-010D-A
DPT2640-025D-A
DPT2640-050D-A
DPT2640-100D-A
DPT2640-0R1B-A
DPT2640-R25B-A
DPT2640-0R5B-A
DPT2640-001B-A
DPT2640-2R5B-A
DPT2640-005B-A

DPT2640-0R1D-A
DPT2641-R25D-A
DPT2641-0R5D-A
DPT2641-001D-A
DPT2641-2R5D-A
DPT2641-005D-A
DPT2641-010D-A
DPT2641-025D-A
DPT2641-050D-A
DPT2641-100D-A
DPT2641-0R1B-A
DPT2641-R25B-A
DPT2641-0R5B-A
DPT2641-001B-A
DPT2641-2R5B-A
DPT2641-005B-A