Setra 264 Low Differential Pressure Transducer


  • Industry standard for very low differential pressure
  • ±0.25%, ±0.4%, ±1% FS accuracy
  • 3 year unconditional warranty
  • Up to 10 PSI overpressure (range dependent)
  • Installation time minimized w/ mounting options
  • Reverse wiring protection
  • Internal regulation permits use with unregulated DC power supplies
  • Fire retardant case (UL 94 V-0 approved)
  • CE & RoHS compliant



Setra’s 264 is the “standard” for low differential pressure measurement in HVAC building automation. The 264 very low differential pressure transducer uses a dead-ended stainless steel welded capacitive sensing element that requires minimal amplification and delivers excellent accuracy and longterm stability in critical installations. The 264 has a 3 year, unconditional warranty, giving the end-user peace of mind well beyond the initial commissioning phase and guarantees performance well after the BAS warranty. The 264 utilizes a robust design that offers brass barbed fittings, and an optional conduit cover for easy and consistent installation.


Key Benefits

  • The Industry Standard
    The 264 has been a consistent and trusted HVAC sensor for over two decades. The reputation of reliability and quality with exceptional delivery time has helped the 264 remain the trusted choice for any low differential pressure applications.
  • Convenient Installation
    The 264 is available in both a wall and conduit versions providing the installer with flexible mounting options. The base mount allows the sensor to be installed anywhere, allowing for a simple installation.
  • The Setra Sensor
    The core technology of the 264 is the all stainless steel capacitive sensing element. Setra designs and manufactures all of their sensing elements resulting in full control over the process and quality of every single sensor. The welded dead-ended capacitive sensors requires minimal amplification and delivers excellent accuracy and longterm stability. Setra’s technology has been used in over 8 million installations and has the highest field acceptance rate in the industry.


  • HVAC/R systems
  • Room pressurization for critical environments
  • Energy management systems
  • Variable air volume and fan control (VAV)
  • Environmental pollution control
  • Lab & fume hood control

Dpstar is an authorized distributor of Setra Systems. We provide our customers with the best selection of instrumentation and equipment with unrivaled prices to perform in Pressure Sensing Solutions. Setra’s pressure sensors are known for their quality and reliability. Designed with premium capacitive sensing technology, Setra offers single-range and multi-range (field selectable) pressure sensors. Capable of measuring both liquid and gasses, Setra has the product to meet a breadth of HVAC applications and can be trusted in your most critical applications. Trust Setra’s over 50 years of pressure transducer engineering excellence.



Performance Data
Accuracy RSS1 (at constant temp) ±1.0% FS (standard);
±0.4% FS, ±0.25% FS (optional)
Non-Linearity, BFSL ±0.96% FS (standard); ±0.38% FS, ±0.22% FS (optional)
Hysteresis 0.10% FS
Thermal Effects2
Compensated range ºF (ºC) 0 to +150 (-18 to +65)
Zero shift %FS/100ºF(50ºC) ±0.033 (±0.06)
Span shift %FS/100ºF(50ºC) ±0.033 (±0.06)
Max. line pressure 10 PSI
Overpressure Up to 10 PSI (range dependent)
Long term stability 0.5% FS/YR
Environmental Data
Operating temperature ºF (ºC)3 0 to +175 (-18 to +79)
Storage temperature ºF (ºC) -65 to +250 (-54 to +121)
Position Effect4
Range Zero offset (%FS/G)
0.1” W.C 2.3
0.25” W.C. 1
0.5” W.C. 0.5
2.5” W.C. 0.2
10” W.C. 0.15
1 RSS of Non-Linearity, Hysteresis, and Non-Repeatability.
2 Units calibrated at nominal 70˚F. Maximum thermal error computed from this datum.
3 Operating temperature limits of the electronics only. Pressure media temperatures may be considerably higher.
4 Unit is factory calibrated at 0g effect in the vertical position.
5 Calibrated into a 50K ohm load, operable into a 5000 ohm load or greater.
6 Zero output factory set to within ±50mV (±25 mV for optional accuracies).
Physical description
Case Fire-retardant glass filled polyester (UL 94 V-O Approved)
Electrical Connection Screw terminal strip
Mounting 4 screw holes on removable zinc plated steel base (designed for 2.75” snap track)
Pressure Fittings 3/16” O.D. barbed brass for 1/4” push on tubing
Zero and Span Adjustments Accessible on top of case
Weight (approx.) 10 Ounces
Electrical Data (voltage)
Circuit 3-Wire (Com, Out, Exc)
Excitation/output5 9 to 30 VDC / 0 to 5 VDC6,7
Output impedance 100 ohms
Bidirectional output at zero pressure 2.5 VDC6,7
Electrical Data (current)
Circuit 2-wire
Output8 4 to 20 mA9,10
External load 0 to 800 ohms
Min. loop supply voltage (VDC) 9 + 0.02 x (resistance of receiver plus line)
Max. loop supply voltage (VDC) 30 + 0.004 x (resistance of receiver plus line)
Bidirectional output at zero pressure 12 mA9,10
Pressure Media
Clean air or similar non-conducting gases.
7 Span (Full Scale) output factory set to within ±50mV. (±25 mV for optional accuracies).
8 Calibrated at factory with a 24 VDC loop supply voltage and a 250 ohm load.
9 Zero output factory set to within ±0.16mA (±0.08 mA for optional accuracies).
10 Span (Full Scale) output factory set to within ±0.16mA (±0.08 mA for optional accuracies).
Specifications subject to change without notice.


Setra 264 Low Differential Pressure Transducer_DpstarGroup