Setra’s 264 is the paradigm for very low differential pressure measurement. Critical to applications in HVAC building automation, healthcare and pharmaceutical facilities, the 264 low differential pressure transducer has held a steadfast reputation for reliability and consistency for over two decades.
The 264 features a dead-ended stainless steel welded capacitive sensing element which necessitates minimal amplification and provides incomparable accuracy and long term stability. With its 3 year unconditional warranty, the 264 ensures top performance granting users peace of mind.
Versatile, the 264 provides users with different mounting options. A base mount for installation anywhere and a DINrail configuration for when applications where maximum space efficiency is essential. In addition to its advanced features and functions, Setra’s 264 is equipped with a durable physical construction, brass barbed fittings and an optional conduit cover.
Specifications
PerformanceData
PhysicalDescription
Standard
Optional
Case
Fire-Retardant Glass Filled Polyester (UL 94
V-O Approved)
Accuracy RSS1
(at constant temp)
±1.0% FS
±0.4% FS
±0.25% FS
Electrical Connection
Screw Terminal Strip
Non-Linearity, BFSL
±0.96% FS
±0.38% FS
±0.22% FS
Mounting
4 screw holes on removable zinc plated steel base (designed for 2.75” snap track)
Hysteresis
0.10% FS
0.10% FS
0.10% FS
Pressure Fittings
3/16” O.D. barbed brass for 1/4” push on tubing
ThermalEffects
Zero and Span Adjustments
Accessible on top of case
Compensated Range ºF (ºC)
0 to +150 (-18 to +65)
Weight (approx.)
10 Ounces
Zero/ Span Shift
%FS/100ºF(50ºC)
±0.033 (±0.06)
Electrical Data(Voltage)
Maximum Line Pressure
10 PSI
Circuit
3-Wire (Com, Out, Exc)
Overpressure
Up to 10 PSI (Range Development)
Excitation/ Output4
9 to 30 VDC / 0 to 5 VDC5,6
Long Term Stability
0.5% FS/1 YR
Output Impedance
100 ohms
EnvironmentalData
Bidirectional output at zero pressure
2.5 VDC5,6
Operating Temperature3 °F (°C)
0 to +175 (-18 to +79)
Electrical Data(Current)
Storage Temperature °F (°C)
-65 to +250 (-54 to +121)
Circuit
2-Wire
PressureMedia
Output2
4 to 20 mA8,9
Typically air or similar non-conducting gases.
External Load
0 to 800 ohms
PositionEffect
Minimum Supply Voltage (VDC)
9 + 0.02 x (resistance of receiver plus line)
Unit is factory calibrated at 0g effect in the vertical position
Range
%FS/G
Maximum Supply Voltage (VDC)
30 + 0.004 x (resistance of receiver plus line)
0.1 in. WC
2.3
Bidirectional output at zero pressure
12 mA8,9
0.25in. WC
1
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 Calibrated into a 50K ohm load, operable into a 5000 ohm load or greater. 5 Zero output factory set to within ±50mV (±25 mV for optional accuracies). 6 Span (Full Scale) output factory set to within ±50mV. (±25 mV for optional accuracies). 7 Calibrated at factory with a 24 VDC loop supply voltage and a 250 ohm load. 8 Zero output factory set to within ±0.16mA (±0.08 mA for optional accuracies). 9 Span (Full Scale) output factory set to within ±0.16mA (±0.08 mA for optional accuracies).
0.5 in. WC
0.5
1.0 in. WC
0.3
2.5 in. WC
0.2
10 in. WC
0.15
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