String (Draw Wire) Potentiometers
PT420 – Position Sensor
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 its stainless 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
Output Signal Options: 4…20 mA (2-wire) and 0…20 mA (3-wire)
Accuracy: see ordering information
Repeatability: ± 0.05% full stroke
Resolution: essentially infinite
Sensor: plastic-hybrid precision potentiometer
Weight: 2 lbs. max.