PXT-K Series

Pressure Transmitters

The PXT-K Series pressure transmitters are state-of-the-art instruments that can be used in applications such as compressors, engines, process control, liquid level and pumps.

  • Piezoresistive pressure transmitter
  • Used with compressors, engines, process control, liquid level and pumps
  • 4-20 mA output signal
  • Corrosion resistant construction
  • High stability

FW Murphy Production Controls offers support for all our products. If you are unable to find the product that you need, please call us at 918-957-1000.

  • Overview
  • Specifications
  • Diagrams
  • Literature

The PXT-K Series pressure transmitters are state-of-the-art instruments providing 4-20 mA output. Each piezoresistive pressure transmitter contains a transducer comprised of a piezoresistive silicon chip mounted on a glass-metal feed-through header welded into a stainless steel housing and filled with silicone oil. The very thin laser-welded stainless steel isolation-diaphragm completes the front side. Media pressure is transferred from the stainless steel isolation-diaphragm via the oil inside the cell to the silicon measuring chip. This construction, combined with the advanced internal signal conditioning circuitry, results in a rugged instrument with extremely small temperature error and class-leading EMI/RFI resistance.

The enclosure and all wetted parts are made of 316L stainless steel.

Operating Range

  • Operating Pressure Range:
    • See How to Order under the PXT-K Series Model Number Matrix in the FW Murphy bulletin
  • Operating Temperature:
    • -22° to 176° F (-30° to 80° C)
  • Compensated Temp Range:
    • -20° to 160° F (-29° to 71° C)
  • Process Connection: 1/4 in. -18 NPT female with 7/8 in. or 1-3/16 in. hex nut
  • Electrical Connection:
    • PXT-K: 1/2 in. NPT male conduit connection with 60 in. long cable, vented
    • PXT-KM: M12 connector
  • Enclosure: NEMA 4/IP65 or better
  • Body: 316L stainless steel
  • Wetted Parts: 316L stainless steel
  • Environmental Effect (Humidity): No effect for 0-95%, non-condensing
  • Mounting: Transmitter can be installed in any axis. Transmitter position has negligible effect on performance as long as it is perpendicular to the flow being monitored.
  • Shock Resistance: 800g per IEC 60068-2-27 (Mechanical Shock)
  • Vibration Resistance: 20G per IEC 60068-2-6 (Vibration under resonance)
  • Wiring Protection: Protected against reverse polarity and short circuit, 48 VDC Maximum
  • Supply Voltage: 8 – 30 VDC (Typically 24 VDC)
  • Transmitter Output: 4-20mA, two wire configurations with load characteristics
  • Insulation: Greater than 10MΩ @ 300 VDC
  • Electromagnetic Compatibility (EMC): Standards; EN 61000-6-2:2005, EN 61000-6-3:2007, EN 61326-2-3:2006
  • Voltage Surge/Spike Protection: Protection against a 600-volt spike per IEC 60-2
  • Shipping Weight: 6.5 ounces

Applicable Standards

  • CSA (c/us):
    • Class I / II / III, Div 1, Groups A-F T4
    • Class I / II / III, Div 2, Groups A-D,F,G T4
  • ATEX:
    • IBExU 10 ATEX 1124 X
    • II 1G Ex ia IIC T6-T4
    • II 3G Ex nA IIC T6
  • Canadian Registration Number: OF15236.2 (all provinces and territories)

PXT-K, 2000 and 3000 psig


PXT-KM, 2000 and 3000 psig


Operating Range