Hengstler HSD37 Incremental Encoder

Hengstler HSD37 Incremental encoder for extremely tough tasks in industrial applications can accept shaft diameters of up to 1″ (25.4 mm). It works reliably in a temperature range from -40° to +100°C.

By employing a state-of-the-art Opto-ASIC, the rotary encoder is resistant to shocks and vibrations and is suitable for use in the chemicals, food processing, oil and gas, paper, and steel industries. The HSD37 series of rotary encoders also includes intrinsically safe ATEX variants for use in potentially explosive atmospheres.

NorthStar’s HSD37 Extreme Duty Industrial Hollowshaft Encoder accepts up to 1″ diameter shafts and operates reliably from -40 to +100°C. It’s Hard Anodized finish enclosure exceeds IP66/IP67 and NEMA 6 enclosure requirements. This robust encoder features a double-sealed housing that allows application where regulatory washdown or caustic chemicals are present.

The utilization of an advanced Opto ASIC with innovative packaging techniques enables the encoder to operate in high shock and vibration environments. It is also available in an Intrinsically Safe version, certified to ATEX EEx ia IIB T4 when used with the appropriate IS Barrier.

Hengstler HSD37 Incremental Encoder Features

  • Single or Dual Output n Double-Sealed Housing
  • ATEX Certification for Intrinsically Safe Applications
  • High-Resolution Unbreakable Disk
  • Electrically and Thermally Isolated
  • Industrial Duty Connector
  • NEMA 4X, 6 / IP66, 67 Rated
  • Rugged Cast-Aluminum Housing
  • Stainless Steel Housing Available


The HSD37 extreme duty encoder features simple installation on motor or machine shafts. It is often mounted on the back of motors where encoder feedback is needed in harsh environment applications. It is ideal for use in environments that demand heavy washdown protection.

  • Converting Machinery
  • Material Handling
  • Packaging Equipment
  • Processing Equipment


Product Family HSD37
Ordering Information Rotary Encoder HSD37
Function / Application Incremental
Technology Optical
Approval CE
Housing Diameter [mm] 95 mm
Solid- / Hollow Shaft Hollow 6 … 24 mm
Protection Rating Housing IP67
Operating Temperature [°C] -40 … +100 °C
Housing Option Stainless Steel
Nickel Finish
powder coated alumunium
Increased Environmental Requirements High mechanical robustness
Connection Cable
Connection box
Revolutions [rpm] 5.000 rpm
Number of Pulses 15 … 5000
Interface Differential Line Driver
Open Collector NPN

Ref: hengstler.de

Download Data Sheet: Incremental Encoder HSD37

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