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Low Power Indusrial Differential Pressure Transmitter
Discontinued Product




See All Models Below

  • 2-Year Warranty
  • 0.15% FS Accuracy
  • Explosion-Proof Electrical Housing
  • Stainless Steel Wetted Parts
  • Process Wetted Parts Meet N.A.C.E. Specification MR0175-91
  • High Common Mode Pressure Rejection
  • 6:1 Turn Down Capability
  • Zero Suppression or Elevation
  • NEMA 4X Housing
  • 4-20 mA or 1-5 Vdc Output
Pressure Transducers - View related products


The PX771A has been discontinued please see the PX5200 as a possible substitute or contact our sales department.

The OMEGA™ PX771A low power pressure transmitter is a compact, high performance transmitter, designed to accurately measure differential pressure and transmit a 4-20 mA signal. The PX771A has an adjustable range with a turndown ratio of 6:1; it comes factory calibrated at the highest span. Ranges from 17 in H2O to 300 PSID are available. Zero and span adjustments are available inside the electronic housing. The zero point can be elevated and suppressed up to ±600%. This transducer consists of an internal silicon diaphragm into which piezoresistive strain gages are diffused, then interconnected to form a pressure sensitive wheatstone bridge.

Liquid, Gas or Vapor
Excitation: 7-36 Vdc for mA output, 6-42 Vdc @ 1.6 mA for voltage output
Output: 4-20 mA (2-wire) or 1-5 Vdc (3-wire) user selectable
Max. Loop Resistance: (supply voltage-7) x 50 .
Accuracy:±0.1% of URL (upper range limit) (includes linearity, hysteresis and repeatability)
Stability: ±0.25% of URL (upper range limit) 1 year
Span Adjust: 16 to 100% URL (dip switches and pot)
Zero Adjust: -600 to 600% LRL (Low Range Limit)
Operating Temperature: Process: -40 to 104°C (-40 to 220°F) (Fluorolube -17.8 to 104°C, 0 to 220°F)
Electrical: -32 to 85°C (-25 to 185°F)
Ambient Total Thermal Effects: 0.010% URL/°F for -25 to 75°F 0.015% URL/°F for 75 to 185°F (0.020% URL/°F for 100 inH 2 O)
Response Time: 63% response 1 ms or 50ms with damping
Static Pressure Effect: +0.05% of URL <100 psi ranges +0.1% of URL for 100 & 300 psi ranges
EMI Effect: ±1% URL @ 10V/m from 20 to 500 MHz. Meets /SAMA PMC-33-1C with cover in place and electrical wiring in grounded conduit
Approvals: Optional UL/CUL or CENELEC
Wetted Parts: 316 SS
Process Connection: 1/4 NPT internal, 1/2 NPT with optional adaptors
Fill Fluid: DC 200 Silicon or Fluorolube
Housing: Low copper aluminum, epoxy coated, NEMA 4X
Electrical Connection: 1 /2 " NPTF conduit, with internal screw terminals
Weight: 2.9 kg (6.4 lb)

(Specify Model Number)
Part Number/Desc.
Consult Sales  
One pair of Stainless steel 1/2 NPT adapters
Consult Sales  
2'' pipe mounting bracket, flange mount (ordered separately)
All prices on this site are shown in Thai Baht.
Note: Comes with complete operator’s manual.
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