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The RT8420 combines the superb linearity and resolution of a plastic-hybrid potententiometer with the durability of Celesco’s 4...20 mA circuit to provide an accurate and reliable electrical signal over all ranges. Additionally, the RT8420 has fully accessible zero and span settings allowing precise matching of the output signal to the required measurement. 


  • Industrial Grade Rotational Position Sensor 
  • Absolute Rotary Position up to 200 turns 
  • Aluminum or Stainless Steel Enclosure Options 
  • IP68 / NEMA 6 


Please review product documents or contact us for the latest agency approval information.  

Product Type Features

  • Product Type  4 – 20 mA Transmitter

Configuration Features

  • Electrical Connection  Connector, Waterproof Cable

Electrical Characteristics

  • Supply Voltage (VDC) 8 – 34

  • Input Current (mA) 4 – 20

  • Output Current (Max) (mA) 4 – 20 mA

  • Output Impedance (Ω) 100000000

Signal Characteristics

  • Frequency Response (Hz) <1K

Body Features

  • Angular Sensing Range (°) 1080, 10800, 14400, 180, 1800, 18000, 28800, 360, 3600, 36000, 43200, 45, 50400, 64800, 720, 7200, 72000, 90

  • Weight (g) 2300


  • Shaft Diameter  .25 mm [ 6 in ]

Usage Conditions

  • Temperature Coefficient of Output (ppm/°K) .01%

  • Operating Temperature Range  -40 – 100 °C [ -40 – 200 °F ]

Packaging Features

  • Package  Dia 2.5in Housing


  • Non-Linearity (FSO) (%) .15, .2, .5, 1.25

  • Sensitivity  Virtually Infinite

  • Non Repeatability and Hysterisis  .05

  • Torque (in-lbs) 2

Related Materials

Datasheets & Catalog Pages

Terms and Conditions

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This information has been provided to your free of charge for your use but remains the sole property of TE Connectivity Corporation (''TE'') or SnapEDA,  Inc. or Ultra Librarian/EMA Design Automation, Inc. (collectively, "Company"). While Company has used reasonable efforts to ensure its accuracy, Company does not guarantee that it is error-free, not makes any other representation, warranty, or guarantee that the information is completely accurate or up-to-date. In many cases, the CAD data has been simplified to remove proprietary detail while maintaining critical interface geometric detail for use by customers. Company expressly disclaims all implied warranties regarding this information, including but not limited to any implied warranties or merchantability or fitness for a particular purpose.