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 789-9526
Tillv. art.nrPEC11R-4020K-S0024
VarumärkeBourns
13,49 kr
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24 Knurl 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS-artikelnummer 172-6432
Tillv. art.nrEM20B4014000
VarumärkeAlps Alpine
286,521 kr
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40 Flat 4 mm Incremental Digital Square Wave Through Hole 16mm Not Indexed - 0.6 mm, 2.6 x 1.8 mm -
RS-artikelnummer 729-5564
Tillv. art.nrEC11B15242AF
VarumärkeAlps Alpine
55,53 kr
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15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 1.8 mm -
RS-artikelnummer 167-5391
Tillv. art.nrPEC11R-4020K-S0024
VarumärkeBourns
10,124 kr
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24 Knurl 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS-artikelnummer 172-8112
Tillv. art.nrEC11E18244AU
VarumärkeAlps Alpine
26,979 kr
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18 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.6 x 1.5 mm -
RS-artikelnummer 167-4663
Tillv. art.nrEMS22D51-B28-LS5
VarumärkeBourns
310,151 kr
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512 Plain 6.34 mm Incremental Digital Square Wave Bracket Mount 22.23mm Indexed 10000rpm - -
RS-artikelnummer 172-8134
Tillv. art.nrEC11B15242AF
VarumärkeAlps Alpine
46,973 kr
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15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 1.8 mm -
RS-artikelnummer 164-0521
Tillv. art.nrDPL12V2424A20FG
VarumärkeTE Connectivity
34,726 kr
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24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1.1mm -
RS-artikelnummer 729-5555
Tillv. art.nrEC11B15242AE
VarumärkeAlps Alpine
48,18 kr
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15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 1.8 mm -
RS-artikelnummer 172-6386
Tillv. art.nrEC11K0925401
VarumärkeAlps Alpine
0,068 kr
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9 Flat 5.975 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1.05 mm, 1.6 x 1.9 mm, 2.1 mm, 2.65 x 1.55 mm -
RS-artikelnummer 265-2906
Tillv. art.nrEC11B1520206
VarumärkeAlps Alpine
10,88 kr
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15 Slot - Incremental Digital Square Wave Through Hole 25mm - - 1 mm, 2.1 x 1.8 mm -
RS-artikelnummer 172-8089
Tillv. art.nrEC05E1220202
VarumärkeAlps Alpine
10,235 kr
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12 Hollow 2 mm Incremental - Bracket Mount, Surface Mount - Not Indexed - 1.5mm -
RS-artikelnummer 623-4221
Tillv. art.nrEC12E2420404
VarumärkeAlps Alpine
6,62 kr
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24 Flat - - - Through Hole 15mm Not Indexed - - -
RS-artikelnummer 167-5089
Tillv. art.nrPEC12R-2125F-N0012
VarumärkeBourns
6,385 kr
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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 663-3230
Tillv. art.nrDPL12SV2424A25K3
VarumärkeTE Connectivity
54,08 kr
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24 Knurl 6.8 mm Incremental Digital Square Wave Through Hole 25mm Not Indexed 60rpm 1 mm, 1.1 mm -
RS-artikelnummer 167-4659
Tillv. art.nrPEC11R-4220F-S0024
VarumärkeBourns
10,843 kr
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24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS-artikelnummer 789-9652
Tillv. art.nrPEC12R-4220F-S0012
VarumärkeBourns
10,34 kr
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12 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed 100rpm 1 mm, 2 x 2.1 mm -
RS-artikelnummer 729-5775
Tillv. art.nrEC12E1220406
VarumärkeAlps Alpine
13,03 kr
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12 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 2 mm -
RS-artikelnummer 167-5393
Tillv. art.nrPEC11R-4215K-N0024
VarumärkeBourns
11,349 kr
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24 Knurl 6 mm Incremental Digital Square Wave Through Hole 15mm Indexed 60rpm 1 mm, 2.6 x 1.8 mm -
RS-artikelnummer 172-6324
Tillv. art.nrEC12E2460802
VarumärkeAlps Alpine
0,072 kr
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24 Flat 6 mm Incremental Digital Square Wave Through Hole 30mm Not Indexed - 1 mm, 2.1 x 2 mm -
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