Mechanical Rotary Encoders

Mechanical rotary encoders, also called shaft encoders, are electro-mechanical devices that convert the angular motions (movement around fixed points) of rotary shafts into either analogue or digital signals.

What are mechanical rotary encoders used for?

Applications that require precision shaft rotation (movement around a specific point) make use of mechanical rotary encoders.

These include industrial control machinery in factories, rotating radar platforms in satellite structures or computer input devices like trackballs and mice.


Types of mechanical rotary encoders

Absolute encoders:

  • have tracking functions to determine specific shaft positioning points in industrial equipment like CNC machines, lathes and bore machines.
  • maintain positioning data even when power is cut from the system. When the system is switched on again it begins operating from the point where it stopped previously.


Incremental (relative) encoders:

  • record deviations in shaft position points over certain time frames. With each new time frame after power is cut and switched on again the encoder starts recording from a predetermined reference and measures the distance between the previous point and the current point.

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Beskrivning Pris Pulses Per Revolution Shaft Style Shaft Diameter Encoder Reading Encoder Signal Mounting Type Shaft Length Index Output Maximum Operating Speed Mounting Hole Diameter Current Rating
RS-artikelnummer 168-0823
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24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1.1mm -
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Tillv. art.nrPEC12R-2120F-S0012
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12 Flat 6 mm Incremental Digital Square Wave Through Hole 9mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
RS-artikelnummer 172-7622
Tillv. art.nrEC12E1240301
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12 Hollow 6 mm Incremental Digital Square Wave Through Hole 8.5mm Not Indexed - 1 mm, 2.1 x 2 mm -
RS-artikelnummer 781-6811
Tillv. art.nrPEC12R-4225F-S0024
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24 Flat 6 mm Incremental Digital Square Wave Through Hole 25mm - 100rpm 1mm -
RS-artikelnummer 729-5918
Tillv. art.nrSRGP300100
VarumärkeAlps Alpine
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9 Hollow 7.6 mm Incremental Digital Square Wave Surface Mount - Not Indexed - 1.6mm -
RS-artikelnummer 623-4079
Tillv. art.nrEC11B15244A7
VarumärkeAlps Alpine
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15 Flat - - - Through Hole 20mm Not Indexed - - -
RS-artikelnummer 167-4664
Tillv. art.nrEMS22Q51-D28-LT4
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256 Plain 3.17 mm Incremental Digital Square Wave Bracket Mount 22.23mm Indexed 10000rpm - -
RS-artikelnummer 167-5395
Tillv. art.nrPEC12R-2225F-N0024
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24 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
RS-artikelnummer 737-7751
Tillv. art.nrPEC11R-4220F-N0012
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12 Flat 6 mm Incremental Digital Square Wave - 20mm Not Indexed 60rpm 7mm -
RS-artikelnummer 729-5684
Tillv. art.nrEC1110120201
VarumärkeAlps Alpine
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- Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.6 x 1.5 mm -
RS-artikelnummer 167-5402
Tillv. art.nrPEC12R-4230F-N0024
VarumärkeBourns
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24 Flat 6 mm Incremental Digital Square Wave Through Hole 30mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
RS-artikelnummer 172-7688
Tillv. art.nrSRGAV80601
VarumärkeAlps Alpine
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8 (Positions) Hollow 5 mm Absolute Gray Code Through Hole - Not Indexed - 0.9 mm, 1.5 mm, 1.55 mm -
RS-artikelnummer 729-5561
Tillv. art.nrEC11E15204A3
VarumärkeAlps Alpine
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15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.6 x 1.5 mm -
RS-artikelnummer 167-5384
Tillv. art.nrPEC11R-4015F-N0024
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24 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm - 60rpm 1mm -
RS-artikelnummer 737-7748
Tillv. art.nrPEC11R-4215F-S0024
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24 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS-artikelnummer 172-6379
Tillv. art.nrEC11E153440D
VarumärkeAlps Alpine
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15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.6 x 1.5 mm -
RS-artikelnummer 265-2906
Tillv. art.nrEC11B1520206
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15 Slot - Incremental Digital Square Wave Through Hole 25mm - - 1 mm, 2.1 x 1.8 mm -
RS-artikelnummer 172-7669
Tillv. art.nrEC11E15244G1
VarumärkeAlps Alpine
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15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.6 x 1.5 mm -
RS-artikelnummer 789-9595
Tillv. art.nrPEC12R-2125F-N0012
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12 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
RS-artikelnummer 172-7683
Tillv. art.nrEC09E1520406
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15 Flat 6 mm Incremental Digital Square Wave Through Hole 15mm Not Indexed - 1 mm, 1.2 mm, 2 mm -
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