PT420 Classic string pot series

PT420 Classic string pot series



The PT420 is available with full-scale measurement ranges from 2 to 100 inches, providing a 0/4-20 mA feedback signal that is linearly proportional to the position of a traveling stainless-steel extension cable.

Use the PT420 to provide position feedback on hydraulic cylinders in factories and utilities, gate position in fresh or wastewater distribution systems, or valve opening in process-related applications. The PT420 installs in minutes by mounting its base to a fixed surface and attaching its cable to the movable object. The PT420 works without perfect parallel alignment, and when itsstainless steel cable is retracted, its height is less than 5”. 


  • Absolute Linear Position
  • Classic Stringpot Design  
  • Stroke Range Options: 0–2 to 0–100 inches 
  • Powder Painted & Anodized Aluminum Enclosure 
  • Industrial Automation & Testing Applications


Product Type Features

  • Product Type  Classic String Pot Series

Signal Characteristics

  • Output Signal  4 – 20 mA

Body Features

  • Housing Material  Aluminum

Usage Conditions

  • Operating Temperature (Deg F) -40 – 93 °C [ -40 – 200 °F ]


  • Resolution (mm) Continuous Analog

Industry Standards

  • IP Rating  IP50
  • Hazardous Area Approvals  No


  • Full Stroke Ranges 50.8 – 2540 mm [ 2 – 100 in ]
  • Accuracy (% of FS) .15
  • Repeatability (% of FS) .02
  • Encoder Drive  No
  • Measuring Cable  Nylon-Coated Stainless Steel