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PT420A Series

The PT420A Series transducer is a +/- 0.25% sensor ideal for melt pressure applications requiring high accuracy, simple installation, repeatability and reliability. The PT420A transducers provide the industry standard 3.33 mV/V signal designed to work with most pressure indicators. The PT420A comes equipped with an eight pin Bendix connector. Optional thermocouple or RTD configurations are available to provide melt temperature. The PT420A features a 1/2-20 UNF thread for installation in standard transducer mounting holes and can be supplied with a variety of other electrical connections if desired.

The PT420A Series includes models PT420A, PT422A, TPT420A, TPT432A and TPT422A.

⚠ WARNING: This product can expose you to chemicals including mercury and lead, which is known to the State of California to cause cancer and reproductive harm. For more information, go to


  • Output: 3.33 mV/V +/- 2.0%
  • Input Voltage: 10 Vdc recommended, 12 Vdc maximum
  • Combined Error: +/- 0.25% FSO, (Including Linearity, Repeatability & Hysteresis) +/- 0.5% FSO for 500, 750, 1,000 psi ranges
  • Repeatability: +/- 0.1%FSO, +/- 0.2% FSO for 500, 750, 1,000 psi ranges
  • Configuration: Four-arm bonded foil Wheatstone bridge strain gage
  • Bridge Resistance: Input: 345 Ohms minimum, Output: 350 Ohms +/- 10%
  • Over Pressure: 2 X FSO or 35,000 psi whichever is less
  • Zero Balance: +/- 5% FSO
  • Internal Shunt Calibration (R-Cal): 80% FSO +/- 0.5%
  • Insulation Resistance: 1000 megohms @ 50 Vdc


  • Max Diaphragm Temperature: 750oF (400oC)
  • Zero Shift (due to temperature change): 15 psi/100oF Typical (27 psi/100oC)
  • Electronics Operating Temperature: 250oF (121oC)
  • Zero Shift Due to Temperature Change: +/- 0.01% FS/oF max (+/- 0.02% FS/oC max)
  • Sensitivity Shift Due to Temperature Change: +/- 0.005% FS/oF max (+/- 0.01% FS/oC max)
  • Mounting Torque: 500 inch/lbs. maximum
  • Standard Wetted Parts: Dymax® coated 15-5 PH SST


ISO 9001 Certificate


Dynisco Pressure Sensor Care and Maintenance

Learn about the proper care and handling of your Dynisco Pressure Sensors


PT420A Manual


Dynisco Online Shop Overview

Dynisco’s Online Shop is where you can have access to ordering all Dynisco parts from Polymer Testing Equipment to Sensors to accessories- all to optimize your application.

Dynisco Pressure Sensor Care and Maintenance

In order to maintain your Dynisco pressure sensor's reliability and accuracy over time, certain maintenance and cleaning procedures should be followed. This video focuses on the removal, care, and maintenance process of a Dynisco pressure sensor from an extruder

Sensor Portfolio Overview

At Dynisco, we offer a diverse portfolio of pressure transducers for your unique application. Whether you're looking for industry-leading accuracy and pressure capability, sustainability without sacrificing performance, or reliability on a budget, our sensors can be configured to fit your specific niche.

Have A Question? Ask a Dynisco expert for more information.

  • Dynisco

    38 Forge Parkway,
    Franklin MA 02038

    +1 508 541 9400  

  • Dynisco Europe GmbH

    Pfaffenstr. 21, 74078,
    Heilbronn, Germany

    +49 7131 297 0

  • Dynisco-Viatran Instrument Sdn Bhd

    Lot 3615, Jalan SM 6/8
    32040 Seri Manjung, Perak, Malaysia     

    +605 6884014