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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Description Prix 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
N° de stock RS 172-8066
Référence fabricantEC16B2410408
MarqueAlps Alpine
1,343 €
Each (In a Tray of 60)
Unité
24 Flat 6 mm Incremental - Through Hole 25mm - - 1.2 mm, 2 x 2.1 mm -
N° de stock RS 265-1723
Référence fabricantEC16B2410408
MarqueAlps Alpine
1,72 €
Each
Unité
24 Flat 6 mm Incremental - Through Hole 25mm - - 2 x 2.1 mm, 1.2 mm 0.5mA
N° de stock RS 265-1739
Référence fabricantEC16B242040R
MarqueAlps Alpine
1,10 €
Each
Unité
24 Flat 6 mm Incremental - Through Hole 25mm - - 1.2 mm, 2 x 2.1 mm -
N° de stock RS 172-6320
Référence fabricantEC16B242040R
MarqueAlps Alpine
1,167 €
Each (In a Tray of 60)
Unité
24 Flat 6 mm Incremental - Through Hole 25mm - - 1.2 mm, 2 x 2.1 mm -
N° de stock RS 172-8134
Référence fabricantEC11B15242AF
MarqueAlps Alpine
4,543 €
Each (In a Tray of 70)
Unité
15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 1.8 mm -
N° de stock RS 729-5564
Référence fabricantEC11B15242AF
MarqueAlps Alpine
5,37 €
Each
Unité
15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 1.8 mm -
N° de stock RS 172-7688
Référence fabricantSRGAV80601
MarqueAlps Alpine
1,705 €
Each (In a Tray of 84)
Unité
8 (Positions) Hollow 5 mm Absolute Gray Code Through Hole - Not Indexed - 0.9 mm, 1.5 mm, 1.55 mm -
N° de stock RS 172-6422
Référence fabricantEC11EBB24C03
MarqueAlps Alpine
12,424 €
Each (In a Tray of 70)
Unité
15 Flat (Inner Shaft), Slot (Outer Shaft) 3.5 (Inner Shaft) mm, 6 (Outer Shaft) mm Incremental Digital Square Wave Through Hole 25mm Not Indexed - 1 mm, 2.6 x 1.5 mm -
N° de stock RS 729-5895
Référence fabricantSRGAV80601
MarqueAlps Alpine
1,69 €
Each
Unité
8 (Positions) Hollow 5 mm Absolute Gray Code Through Hole - Not Indexed - 0.9 mm, 1.5 mm, 1.55 mm -
N° de stock RS 729-5703
Référence fabricantEC11EBB24C03
MarqueAlps Alpine
13,54 €
Each
Unité
15 Flat (Inner Shaft), Slot (Outer Shaft) 3.5 (Inner Shaft) mm, 6 (Outer Shaft) mm Incremental Digital Square Wave Through Hole 25mm Not Indexed - 1 mm, 2.6 x 1.5 mm -
N° de stock RS 729-5817
Référence fabricantEC12E24404A8
MarqueAlps Alpine
1,26 €
Each
Unité
24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 2 mm -
N° de stock RS 263-2930
Référence fabricantEC11B152420G
MarqueAlps Alpine
3,74 €
Each
Unité
15 Slot - Incremental Digital Square Wave Through Hole 25mm - - 2.1 x 1.8 mm, 1 mm -
N° de stock RS 172-7597
Référence fabricantEC12E24404A8
MarqueAlps Alpine
0,797 €
Each (In a Tray of 120)
Unité
24 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 2 mm -
N° de stock RS 172-8123
Référence fabricantEC11B152420G
MarqueAlps Alpine
3,279 €
Each (In a Tray of 70)
Unité
15 Slot - Incremental Digital Square Wave Through Hole 25mm - - 1 mm, 2.1 x 1.8 mm -
N° de stock RS 729-5545
Référence fabricantEC10E1220505
MarqueAlps Alpine
0,93 €
Each
Unité
12 Hollow 3.6 mm Incremental Digital Square Wave Through Hole - Not Indexed - 1 mm, 2.1 x 1.8 mm -
N° de stock RS 172-6398
Référence fabricantEC11B15242AE
MarqueAlps Alpine
3,298 €
Each (In a Tray of 70)
Unité
15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.1 x 1.8 mm -
N° de stock RS 729-5589
Référence fabricantEC11E15244G1
MarqueAlps Alpine
3,86 €
Each
Unité
15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 2.6 x 1.5 mm, 1 mm -
N° de stock RS 172-6281
Référence fabricantEC10E1220505
MarqueAlps Alpine
0,534 €
Each (In a Bag of 400)
Unité
12 Hollow 3.6 mm Incremental Digital Square Wave Through Hole - Not Indexed - 1 mm, 2.1 x 1.8 mm -
N° de stock RS 172-7669
Référence fabricantEC11E15244G1
MarqueAlps Alpine
2,691 €
Each (In a Tray of 120)
Unité
15 Flat 6 mm Incremental Digital Square Wave Through Hole 20mm Not Indexed - 1 mm, 2.6 x 1.5 mm -
N° de stock RS 623-4079
Référence fabricantEC11B15244A7
MarqueAlps Alpine
5,43 €
Each
Unité
15 Flat - - - Through Hole 20mm Not Indexed - - -