Large Bore Hollow Shaft Encoders with Magnetic Sensing

Mount to Large Motor Shafts with Ease

Dynapar encoder experts designed the NorthStar HT55 and HT85 hollow shaft magnetic encoders to mount to large motors quickly and easily on shafts up to 4.5 inches (115mm) in diameter. A hollow shaft allows users to easily mount the encoder with or without NEMA C-face provisions or through a fan shroud via a single point tether. Wiring the HT series is also a breeze with reverse polarity and short circuit protection helping to forgive common wiring mistakes such as crossing power and signal wires.

• Bore sizes ranging from 1/2" (12mm) up to 4.5" (115mm) 
• Single or dual output options for redundancy 
• Rod or single point slotted tether options for easy mounting

Reliable in Heavy Duty Environments

Magnetic sensing technology uses changes in magnetic fields to sense the rotation of the encoder pulse wheel and sends the response as a digital signal to the controlling device. This technology allows the encoder to detect position and speed information without the interference of contaminates such as dust, dirt and water, elements that affect accuracy and reliability in other types of encoders. Rotary encoders with magnetic sensing outperform optical encoders in demanding environments such as steel mills, pulp and paper mills, and sawmills.