Magnetostrictive Position Sensor Replacement – Part II

As mentioned in our last post Magnetostrictive Linear Position Sensors are a common type of position sensor for hydraulic cylinders where high resolution is of primary concern.  The sensor incorporates a stainless steel tubular probe (ie. “the Rod”) and is surrounded by a short toroidal magnet installed in a counterbore in the piston. Magnetostrictive sensors can consume a fair amount of power and are not the most mechanically rugged sensor technology.  One of the key

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LVDT Based Position Sensors Offer Greater Longevity In Harsh Environments

Accurate sensing of linear position in hydraulic cylinders takes on more complex design considerations when targeting applications where a rugged outdoor environment is the operational norm. Environmental considerations include:

  1. Heat – Not just ambient temperatures but the temperature of hydraulic fluid rises with continued operation and can increase the effective operating temperature range.
  2. Vibration – Applications for hydraulic cylinders in heavy duty construction equipment, drilling and, Mining equipment, etc., present severe challenges for certain types of sensors, most

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Long Stroke Hydraulic Cylinders Part 2 – Replacing Failed Rod-Type Sensors.

Rod based magnetostrictive position sensors are historically one of the primary types of feedback sensors used on hydraulic or pneumatic cylinders where high accuracy was of primary concern.  The sensor (often called an “LDT” or “MLDT”) incorporates a stainless steel tubular probe (ie. “the Rod”) and is surrounded by a short toroidal magnet installed in a counterbore in the piston. Magnetostrictive sensors can consume a fair amount of power and are not the most mechanically

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