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.
SPECIFICATIONS Service: 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)