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LP Series Encoders
Low profile encoder products for heavy-duty applications

Rugged and compact encoder series for harsh environments

Engineers’ Choice Award 2017 FINALIST

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pdf LP Series Encoders User Manual

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Product Specifications & User Manual | Environmental Specifications | Hazardous Areas | Programmable Versions

The LP Series rotary encoder product family is built to withstand extreme temperatures, shock and vibration, and wet and dirty environments. This industrial encoder line provides reliable and precise rotary motion control feedback via a compact, low profile encoder package for harsh duty environment applications.

LP Series Encoders Product Review by Design World

LP Series Overview

  • Three LP Series encoder types are available to fit a variety of system needs:
Compact Terminal Box Explosion Proof
  • Each of the three encoder model types is available in incremental or absolute single turn outputs. The compact version comes with either a cable or connector termination . 

  • The compact version comes with either cable or connector terminations.

  • The terminal box version features enhanced electronics which makes it resistant to wiring errors.

  • All LP Series encoder models provide a rugged and reliable motion control solution for a wide range of harsh environments and are ideal for use in these industries:
    • Material handling
    • Metal process
    • Wind turbine
    • Off highway vehicle
    • Elevator
    • Agriculture
    • Oil and gas
    • Building automation


Mechanical Options

A variety of mechanical encoder configurations are available including shafted, through shaft, blind shaft or shaft with integrated coupling to fit a wide range of installations.

Solid shaft Through shaft Blind shaft Integrated coupling

Rotary Encoder Shaft

Solid mounting with a low profile (12mm— 1 in)

Rotary Encoder Through Hollow Shaft

Through hollow shaft (up to 30mm—1 1/8 in) allows for redundant mounting (multiple units on a single shaft)

Rotary Encoder Blind Shaft

For installation on motor shafts (cylindrical or center-tapped)

Rotary Encoder with Integrated Coupling

Unique solution for flange mounting with through shaft (up to 20mm— 0.78 in) capability

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Electrical Options

Available Outputs

Incremental Absolute Single-Turn

Incremental HTL-TTL

 28/V = Standard line driver 5-30 V In/Out / PushPull

28/5 = Standard Line Driver with 5 volt (TTL) regulated output

28/VR = Push Pull 11-30V reinforced (only S versions)


5 — 30 V / SSI

Absolute Single-Turn

Incremental Commutation Tracks

Enhanced Electronics

The terminal box and explosion proof / flameproof versions of the LP Series provide additional electrical features such as:

  • Protection against miswiring
  • Overvoltage protection up to 60V
  • Enhanced drive capabilities to ensure a strong signal over long cable runs
LP Series Encoder with Terminal Box LP Series Encoders Enhanced Electronics

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Encoder Product Specifications

Data Sheets:

North American models:

LP35 models: Standard  |  Programmable  |  Explosion Proof

International models:

HH*9 models:  Incremental |  Programmable 
HH*B models: Incremental |  Programmable 
HH*X models:  Explosion Proof
AH*9 models:  Absolute |  Programmable 
AH*B models:  Absolute |  Programmable 
AH*X models:   Explosion Proof


Ball End Tether
Bore Reduction Insert
Integrated Coupling
Key for 12mm shaft
Long Tether
Programming Tool
Short Tether
Tether Pin Kit
Triple Beam Coupling
Spring Disc Coupling
Secured Bellows Coupling

User Manual:

LP Series Encoders User Manual- North America

LP Series LP35 Tether Pin Kit

Compact version Terminal box version Explosion proof version
Thickness (mm / inch) 26 mm— 1 inch 51 mm—2 inch
Housing material Anodized aluminum Hard anodized aluminum
Shaft styles Solid — Blind — Integrated coupling — Through— Application dedicated shaft
Terminations M12 Connector —Cable Terminal box with cable gland inserts (no cable)
Electrical output HTL-TTL / SSI
Incremental resolution 1 to 10000 ppr
Absolute single turn resolution Up to 16 bits
Programmable version Yes Yes No
Enhanced electronics No Yes Yes
Mechanical speed Up to 6000 RPM
IP rating IP66
Operating temperature -40°C to 100°C -40°C to 85°C
Shock ≤ 3000 m/s2 (5 ms 1/2 sine)
Vibration ≤ 200 m/s2 (55 to 2000 Hz)

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Environmental Specifications

Heavy-duty design

The LP Series of encoders has been built tough to withstand extreme temperatures, shock and vibration, and wet and dirty environments, while providing accurate speed and position sensing feedback.

  • Standard clear aluminum anodized housing resists corrosion

  • Encapsulated electronics provide IP66 ingress protection from dust and moisture

  • Operates in extreme temperatures, from-40°C to 100°C

  • Bearings protected against dust and water jets
LP Series Encoder Family: Rugged & Compact
LP Series Encoders feature a compact, low profile design while maintaining high performance in heavy-duty & harsh environment applications


All LP Series encoders come standard with UL and CE certifications for use in European and North American applications.

CE Certified     CUL Listed

Available triple certifications for the hazardous area rated encoder models help to simplify the certification process of the end-users’ assembly and save costs in obtaining additional approvals to comply with international safety regulations.

UL certified cUL certified   IECEx certified   ATEX certified

Hazardous Area LP Series Encoders

Explosion Proof / Flameproof, Nonincendive and Intrinsically Safe Encoders

  • Certifications include UL Class I Division 1 and 2, and Class II Division 1 and 2, as well as ATEX and IECEx Zones 0, 1 and 2. 

  • Explosion proof/ flameproof models are designed to operate directly in explosive Division 1, Zone 1 environments.
  • To learn more, check out the news release.
HHUX LP35 LP Series Blind Shaft Explosion Proof EncoderLP Series Explosion Proof/Flameproof Encoder

LP Series encoders are designed to operate in hazardous areas around the world

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Programmable versions

The LP Series encoder family* is available in programmable versions with an easy-to-use software that allows for quick programming of the encoder resolution. Having programmable encoders on hand can help to save inventory costs and reduce downtime.

Easily program encoder resolution
Incremental Absolute single-turn
  • From 1 to 10 000 pulses per revolution
  • Index positioning (Top 0)
  • Index calibration
  • Programmable U/V/W channels
  • Up to 16 bits
  • Reset to zero function
*Programmable version not available with Explosion Proof / Flameproof LP Series encoders

LP Series Programmable Encoder Software Download

LP Series Programmable Encoder

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