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Incremental encoders

Incremental encoders are rotary transducers used to releave length or thickness measures, angles and speed. Incremental encoders are commonly employed on industrial operating machines, combined to counting, visualizing or control systems, to achieve programmed positionings, preset step shifts or simply to display measures of physical magnitudes.
Thanks to the innovative electronic circuitry and the excellent quality of the components, Elap encoders ensure high resolution, great accuracy and repeatability.
The wide choice of mechanical and electronic solutions allows to meet all application requirements.

  • Absolute encoders
    Absolute encoders

    Absolute encoders

    Single turn and multiturn encoders. EtherNet/IP encoders, EtherCAT encoders. Profinet encoders. Profibus encoders. CANopen encoders. Magnetic encoders.UL Listed encoders.

  • Incremental encoders
    Incremental encoders

    Incremental encoders

    Optical and magnetic encoders. Encoders with high pulses / revolution number. Programmable encoders.

  • Encoder RE620 Square fl.
    Incremental encoders

    RE620 – RE650 
    Square flange 63.5×63.5 mm
    Body Ø 58 mm
    Shaft Ø: 6 – 8 – 9.52 – 10 mm
    PPR: 2 ÷ 12500

  • Encoder RE520 Round fl.
    Incremental encoders

    RE520 – RE540 – RE530
    Round flange
    Body Ø 58 mm
    Shaft Ø 6 – 8 – 9.52 – 10 mm
    PPR: 2 ÷ 12500

  • Hollow shaft encoder
    Incremental encoders
    1. RE400RE470 RE410 RE450
      Blind hollow shaft
    2. Body Ø 58 mm
    3. Hollow shaft Ø 6, 8, 10, 12, 14, 15 mm
      PPR: 2 ÷ 12500
  • Encoder REM Magnetic
    Incremental encoders

    Magnetic incremental encoders REM
    Round flange, square flange or hollow shaft
    Body Ø 58 mm
    PPR: 8 ÷ 2048

  • Encoder REV High PPR
    Incremental encoders

    REV520 – REV540 – REV620
    High ppr and glass disc
    Glass measuring disc
    Round & square flange available
    Body Ø 58 mm
    PPR: 1000 ÷ 50000

  • Encoder REC Compact
    Incremental encoders

    Compact size H38
    M12 connector or cable
    Round or square flange or hollow shaft
    Body Ø 58 mm                PPR: 2 to 12500

  • Encoder RE50 Ø 50
    Incremental encoders

    Body Ø 50 mm
    Round flange
    Shaft Ø 6 – 8 –  10 mm
    Aluminium case
    M12 connector or axial cable outlet
    PPR: 2 ÷ 12500

  • Encoder SEB Ø 50
    Incremental encoders

    Body Ø 50 mm
    Round flange Ø 50 mm
    Shaft Ø 10 mm
    ABS plastic case
    IP64 protection degree – optional IP65
    PPR: 2 ÷ 12500

  • Encoder RE40 Ø 40
    Incremental encoders

    Body Ø 40 mm
    Round flange, square flange, hollow shaft, screw fixing versions available
    PPR: 2 ÷ 12500 Metal housing

  • Encoder E40 Ø 40
    Incremental encoders

    Body Ø 40 mm
    Round flange, square flange, hollow shaft, screw fixing versions available
    PPR: 2 ÷ 12500

  • Encoder E30 Ø 30
    Incremental encoders

    Body Ø 30 mm
    Round flange Ø 30 mm
    Shaft Ø 4mm
    PPR:  2 ÷ 12500

  • Encoder RM36 magnetic
    Incremental encoders

    RM36-I – Incremental magnetic encoder
    Body Ø 36 mm body
    PPR: 128, 512 or 102

  • Encoder RM22 magnetic
    Incremental encoders

    RM22-I – magnetic incremental encoder
    Body Ø 22 mm
    PPR: 128

  • Encoder fittings
    Incremental encoders

    Joints, Wheels, Encoder Supports
    Wide choice of encoder joints and measuring wheels.

  • Linear transducers
    Linear transducers

    Linear transducers

    Incremental linear transducers, magnetic transducers, wire sensors, optical scales.

  • Wire transducers
    Wire transducers

    Wire transducers

    Absolute wire encoders, fieldbus wire encoders, incremental wire encoders, wire potentiometers.

  • Linear potentiometers
    Linear potentiometers

    Linear potentiometers

    Linear motion potentiometers. Potentiometers with analogue output. Small-sized potentiometers. Potentiometers with M12 connector

  • Althen Potentiometers
    Althen potentiometers

    Althen Potentiometers

    Single turn rotary potentiometers – multiturn rotary potentiometers – continous-rotation potentiometers – linear motion potentiometers

  • Industrial joysticks
    Industrial joysticks

    Industrial joysticks

    Althen industrial joysticks range includes solutions for the control  1 to 6 dimensions, with different sensor types.

  • Vibration sensors
    Vibration sensors

    Vibration sensors

    Wilcoxon Research® vibration sensors and accessories offer reliable performance and functionality for vibration analysis, machinery monitoring and balance-of-plant applications

  • Tilt sensors
    Vigor Technology tilt sensors

    Tilt sensors

    Vigor Technology tilt sensors range includes several models with different measuring angles, axes, accuracy grade, repeatibility and output signals.

  • Touch screen panels
    Weintek HMI

    Touch screen panels

    Weintek touch-screen panels range includes a wide choice of models, from 4.3” to 10” size.

  • PLC controllers
    PLC axes controllers

    PLC controllers

    NEXUS, VEGA and NEOS, Elap comprehensive series of multi-function controllers are designed to make the programming operations and work cycle control easy.

  • Counters & visualizers
    Counters and visualizers

    Counters & visualizers

    ELAP counters and readouts solve all the problems related to counting and displaying lengths or tickness measures and machined pieces numbers.

  • Positioners


    Elap positioners range includes includes several PLC programmable equipments.

  • Monitoring Systems
    Shinkawa condition monitoring systems

    Monitoring Systems

    Shinkawa offers a wide range of condition monitoring systems for rotating machinery.

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Incremental encoder development and production

Incremental Encoders are electromechanical angular position transducers, being rotary devices that convert the angular position of their rotary axis into electrical impulses. They are termed ‘incremental’—or else ‘relative’—as they measure the incremental displacements of the rotor with respect to a zero point. The resulting output signal consists of a train of electrical pulses that can be processed via an external counting or control instrument. In magnetic encoders, a fixed sensor measures the variation in the magnetic flux generated by a rotating magnetised disk. In the optical versions, instead, an optical sensor reads a reference matrix.


Unlike for absolute encoders, in incremental rotary encoders the signals encode the movement of the rotor specifically in an incremental way in respect of the previous position. By processing such data, it is possible to determine the absolute position of the rotor, performing a search operation of reference at the end of each stroke. In the event of a power failure, the position data is lost. For its retrieval, a search of the reference point must be completed returning the rotor to the zero position. In magnetic incremental encoders, the detection of the movement is carried out by measuring variations in the magnetic flux. This contactless system eliminates issues with wear and tear, thus extending the encoder life. In optical incremental encoders measurements are taken by photosensors that read a matrix with opaque and transparent sections, used as a reference for the movements made.


Incremental rotary encoders are very common in several industrial fields, as they are mounted on automatic operating machines to carry out advances and positioning in predetermined steps. Such solutions are normally combined with counting, visualisation and control systems. The number of sectors in which incremental encoders are used is vast and includes:

  • The textile industry
  • Driverless transport systems
  • Elevators
  • Robotics
  • Labelling systems
  • Winches and rigs
  • Agricultural machinery

Custom models

In addition to a series of widely used standard models, ELAP develops and produces customised incremental rotary encoders, devised to measure displacements in the customer’s specific industrial processes. Thanks to the extremely vast possibility of configuration and calibration of our instruments and to our internal design studio, ELAP products can be tailored to any specific need you may have.

Contact us today for further information, clarifications or quotes regarding *** ELAP!


Since 1968 ELAP has been growing in the field of industrial automation, getting specialized in developing, manufacturing and marketing transducers, sensors and control equipment for operating machines.

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