Hengstler Incremental Encoder HD25

Hengstler Incremental Encoder HD25

 Hengstler Incremental Encoder HD25

Hengstler Incremental Encoder HD25 | Descriptions

The optical HD25 incremental rotary encoder is a unit for high demands that exceed the requirements of IP66/IP67 and NEMA 6. Available with stainless steel housings, these rotary encoders are ideal for tough ambient conditions that require excellent resistance to high-pressure cleaners and corrosive chemicals. Large-sized bearings are designed to withstand high axial and radial forces up to 440 N. The HD25 series of rotary encoders also includes intrinsically safe ATEX variants for use in potentially explosive atmospheres.

The HD25 Harsh-Duty Optical Encoder is a compact heavy-duty encoder designed to exceed IP66/IP67 and NEMA 6 enclosure requirements. It is also available in stainless steel that exceeds NEMA 4X and NEMA 6P requirements and is ideal for stringent washdown environments, including those where high-pressure steam or caustic chemicals are needed to meet regulatory requirements.

The HD25 features a max. 440N Axial and Radial Bearings, -40° to +100°C temperature range and unique labyrinth double-sealed housing, and optional dual "redundant" outputs and is covered by a two-year warranty (one year for bearings). NorthStar's traditional quality, reliability, and value are built-in to every HD25 encoder. Also available in this series, is an Intrinsically Safe version certified to ATEX EEx ia IIB T4 when used with the appropriate IS Barrier. Accessory barriers can be supplied with the encoder.


  • Single or Dual output
  • Optional high current line driver
  • ATEX Certification available for Intrinsically Safe application
  • High Resolution Unbreakable Disk
  • Industrial Duty Connector n NEMA 4X / IP67 Rated
  • Nickel or Stainless Steel Housing available


The HD25 Harsh-Duty Optical Encoder is ideal for machine applications with corrosive environments that demand heavy washdown protection. This compact, the special-duty encoder is designed to exceed IP66/IP67 and NEMA 6 enclosure requirements with a PPR range through 5000. ATEX certification is also available for intrinsically safe applications.

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

Another Article:


Product FamilyHD25
Ordering InformationRotary Encoder HD25
Function / ApplicationIncremental
Housing Diameter [mm]67 mm
Solid- / Hollow ShaftSolid 10 ... 12 mm
Protection Rating HousingIP67
Operating Temperature [°C]-40 ... +100 °C
Housing OptionStainless Steel
 Nickel Finish
 powder coated alumunium
Increased Environmental RequirementsHigh mechanical robustness
 Ex atmosphere
 CSA approval
Revolutions [rpm]6.000 rpm
Number of Pulses1 ... 5000
InterfaceDifferential Line Driver
 Open Collector NPN

Ref: hengstler.de

Contact us : sales@wmablog.com or visit to our E-Commerce

Download Data Sheet: Incremental Encoder HD25