MS 25

Exposed linear encoders with singlefield scanning

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MS 25


  • Standard dimensions
  • System resolution: 2 µm - 0.1 µm
  • Display of the signal quality directly at the scanning head via 3-coloured LED function
  • Easy mounting without additional test box
  • Easy mounting as a result of large mounting tolerances
  • High insensitivity to contamination by use of an extensive singlefield scanning principle 
  • Interface: TTL, sinus 1 Vpp
  • Signal-immunity against aging and temperature changes
  • High permissible traversing speed 
  • Reference mark (accurate and repeatable from both traversing directions)
  • Integrated subdividing electronics in the encoder head: for up to times 200 interpolation (before quadrature)
  • Max. measuring length: 20 000 mm
  • Optional: two independent switch signals (optical) for individual functions
  • Optional: position of reference mark customizable
  • Optional: one switch signal for special functions
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MS 25



ModelSwitch signalsReference mark selectable LED-control
MS 25optionalyesyes
ModelAK MS 25 1 VppAK MS 25 TTLx1uAK MS 25 TTLx2AK MS 25 TTLx5AK MS 25 TTLx10AK MS 25 TTLx20AK MS 25 TTLx25AK MS 25 TTLx50AK MS 25 TTLx100AK MS 25 TTLx200
Measuring step [µm]Depending on external interpolation10.
Integrated interpolation--Times 1Times 2Times 5Times 10Times 20Times 25Times 50Times 100Times 200
Max. velocity [m/s]10.0010.0010.006.403.202.401.921.920.960.96
Max. output frequency250 kHz--------
Edge separation amin [ns]--50025030030020020010010050
Further features of the scanning head
Interpolation error
with signal stabilization
Typical ±65 nm (Peak-Peak)
Electrical connectionCable, 0.5 m, 1 m or 3 m with D-sub connector, male, 15-pin
Voltage supply+5 V ±10 %
Power consumption
  • 1 Vpp: max. 715 mW (without load)
  • TTL: max. 907 mW (without load)
  • Current consumption
  • 1 Vpp: 130 mA (without load)
  • TTL: 165 mA (without load)
  • Vibration 55 Hz – 2000 Hz≤ 150 m/s2 (EN 60 068-2-6)
    Shock 8 ms750 m/s2 (EN 60 068-2-27)
    Operating temperature0 °C to 60 °C
    Storage temperature−20 °C to 70 °C
    MassScanning head: 21 g (without cable), cable: 30 g/m, connector: D-sub connector: 28 g
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    MS 25


    • TMT 20 MK- Bandanbauhilfe

      TMT 25 MK tape mounting tool

      Enables a safe and precise mounting of a steel tape scale.

      Mounting instructions: TMT 25 MK tape mounting tool 

    • PWT 100 / PWT 101

      The PWT 100 / PWT 101 is a testing device for checking the function and adjustment of RSF Elektronik encoders. Thanks to its compact dimensions and robust design, the PWT 100 / PWT 101 is ideal for mobile use. A 4.3-inch touchscreen provides for display and operation. For example, for encoders with EnDat interface you can not only display the position value but also export the online diagnosis, shift datums, and perform further inspection functions.

      Available functions
      The performance range of the PWT 100 / PWT 101 can be expanded by firmware update. Appropriate firmware files that can be imported to the PWT 100 through a memory card (not included in delivery) will be made available at 

    Request of Quotation
    MS 25


    Mounting Instructions
    AK MS 25
    1981.96 kb
    MS 25 MT
    1435.37 kb
    MS 25 MP
    1530.19 kb
    MS 25 MK
    1519.66 kb
    MS 25 MA, MS
    1574.94 kb
    MS 25 GK
    1530.87 kb
    MS 25 GA
    1863.58 kb
    3d models
    219.63 kb
    EC Declaration of conformity
    MS 25- EC declaration of conformity
    536.53 kb
    MS 25
    3146.98 kb