Hengstler HSD 44T Incremental Encoders

Hengstler HSD 44T Incremental Encoders are ideally suited to controlled motor feedback in heavy-duty drives and hybrid-drive vehicles. It has been tried and tested in the field and is reliable in heavy-load applications and industrial environments.

The North Star HSD44 series rotary encoders that have proven themselves in heavy-duty rail operation are designed for extreme working conditions. The devices provide 1024 pulses per revolution (PPR) via a tough, stainless steel disc in conjunction with a specially-developed optical sensor.

The large slot in the sensor reduces the sensitivity of the motor bearings to impact, vibrations and wear. The HSD44 has been specifically designed for attachment to the end of a motor. Adapter plates are available for popular motor types. On request, we can manufacture adapter plates for any appropriate application.

Even electric motors in the harshest environment require feedback to ensure smooth speed control. In the past, engineers have applied encoders and sensors designed for standard industrial environments into these extremely harsh environments, impacting system reliability and increasing life-cycle costs. Hengstler has the solution.

The heavy rail proven NorthStar HSD44 series optical encoder was designed to be a survivor. This anodized aluminum encoder can survive high levels of shock and vibration, wide temperature extremes, and operating environment contaminants. The HSD44 can withstand the harshest outdoor environments and the toughest industrial applications.

Hengstler HSD 44T Features

  • Sealed against dust, oil, grease, liquids, vapor and mud
  • Designed for high shock and vibration applications
  • Electrically isolated from motor shaft
  • Rugged cast-aluminum housing
  • Advanced ASIC technology and optics
  • Easy, hex wrench installation
  • High temperature range: -40 … +100°C


The HSD44 is the ideal source of control feedback for motors that drive heavy electric, and hybrid-electric vehicles. It is field proven for reliable operation in severe transportation and industrial environments.

Designed for

  • Heavy Rail
  • Commercial Hybrid Electric and Electric Vehicles
  • Heavy Duty cranes
  • Mining Transport
  • Conveyors


Transportation, paper, steel, mining, material handling and other industries with harsh environments where precise and reliable encoder feedback is needed.

Hengstler HSD 44T Specification

Product Family HSD44T
Ordering Information Rotary Encoder HSD44T
Function / Application Incremental
Technology Optical
Approval CE
Housing Diameter [mm] 112 mm
Solid- / Hollow Shaft Hollow 16 mm
Protection Rating Housing NEMA 6
Operating Temperature [°C] -40 … +100 °C
Housing Option Alumunium
Increased Environmental Requirements High mechanical robustness
vehicle application
Connection Cable
Revolutions [rpm] 6.000 rpm
Number of Pulses 1024
Interface Differential Line Driver

Ref: hengstler.deDownload Data Sheet: Incremental Encoders HSD 44T

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