Rotary encoder

Solid shaft:
Hollow shaft:
Incremental:
Singleturn:
Multiturn:

Interested in our rotary encoders, but still have change requests? We are happy to modify it for you so that it fits perfectly.

Learn more

  • Tel.: +49 / 7424 - 89 - 0
We will be pleased to help you.

  • Hengstler GmbH
    Uhlandstr. 49
    78554 Aldingen
  • Tel. +49 / 7424 - 89 -286
  • Support request

Technology and flexibility are key characteristics of our incremental and absolute rotary encoder series ICURO and ACURO. Monolithically integrated opto-ASICS will reliably replace up to 200 SMD components. Thanks to the modular construction, users can select the required configuraion from over two million possible rotary encoders.

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/en/f_c1003/Encoder/ACURO AX73 - Absolute Encoder
Diameter
59 mm
Resolution
ST: 10 ... 22 Bit
MT: 12 Bit
Solid- / Hollow Shaft
Solid 10 mm
Protection case
IP66, IP67
Interface
BiSS / SSI, Profibus
Approval
CE, ATEX and IECEx
Features
ATEX certified
IECEx certified
Robust design
Terminal box
Stainless steel housing
/en/f_c1003/Encoder/HD20 Incremental
Diameter
51 mm
Resolution
Number of Pulses: 1 ... 3600
Solid- / Hollow Shaft
Solid 10 mm
Protection case
IP67
Interface
Open Collector NPN, Push-pull
Approval
CE, ATEX, CSA
Features
up to 3600 pulses
-40°C to +100°C
6,000 rpm
IP67
NEMA 4X
ATEX variants
/en/f_c1003/Encoder/HD25 Incremental
Diameter
67 mm
Resolution
Number of Pulses: 1 ... 5000
Solid- / Hollow Shaft
Solid 10 ... 12 mm
Protection case
IP67
Interface
Differential Line Driver, and 2 more
Approval
CE, ATEX, CSA
Features
up to 5000 pulses
-40°C to +100°C
6,000 rpm
IP67
NEMA 4X
ATEX variants
/en/f_c1003/Encoder/HSD25 Incremental
Diameter
58,9 mm
Resolution
Number of Pulses: 1 ... 3600
Solid- / Hollow Shaft
Hollow 6 ... 19 mm
Protection case
IP67
Interface
Differential Line Driver, and 2 more
Approval
CE
Features
Shaft diameter up to 25.4 mm
-40°C to +100°C
IP67, NEMA 4X
/en/f_c1003/Encoder/HSD37 Incremental
Diameter
95 mm
Resolution
Number of Pulses: 15 ... 5000
Solid- / Hollow Shaft
Hollow 6 ... 24 mm
Protection case
IP67
Interface
Differential Line Driver, and 2 more
Approval
CE
Features
-40°C to +100°C
IP67, NEMA 4X
Aluminium or stainless steel housing
/en/f_c1003/Encoder/HSD38 Incremental
Diameter
96,5 mm
Resolution
Number of Pulses: 15 ... 5000
Solid- / Hollow Shaft
Hollow 12 ... 20 mm
Protection case
IP67
Interface
Differential Line Driver, and 2 more
Approval
CE
Features
-40°C to +100°C
IP67, NEMA 4X
Aluminium housing
/en/f_c1003/Encoder/ISD25 Incremental Encoder
Diameter
58 mm
Resolution
Number of Pulses: 1 ... 3600
Solid- / Hollow Shaft
Hollow 6 ... 19 mm
Protection case
IP67
Interface
Differential Line Driver, and 2 more
Approval
CE, ATEX, CSA
Features
-40°C bis +100°C
IP67, NEMA 4X
Nickel plated or stainless steel
ATEX approval
/en/f_c1003/Encoder/ISD37 Incremental Encoder
Diameter
95,3 mm
Resolution
Number of Pulses: 15 ... 5000
Solid- / Hollow Shaft
Hollow 6 ... 25 mm
Protection case
IP67
Interface
Differential Line Driver, and 2 more
Approval
CE, ATEX, CSA
Features
-40°C bis +100°C
IP67, NEMA 4X
Aluminium or stainless steel
ATEX approval
/en/f_c1003/Encoder/ICURO RI30 Incremental Encoder
Diameter
30 mm
Resolution
Number of Pulses: 5 ... 1500
Solid- / Hollow Shaft
Solid 5 mm
Protection case
IP50 / IP64
Interface
Push-pull, RS422
Approval
UL, CE
Features
-10°C to +70°C
10,000 rpm
IP64
pulse frequency up to 300 KHz
/en/f_c1003/Encoder/S21 Sinus
Diameter
53 mm
Resolution
Number of Pulses: 1024 ... 2048
Solid- / Hollow Shaft
Hollow 8 ... 12,7 mm, Solid 10 mm
Protection case
IP40
Interface
SinCos 1Vss
Approval
UL, CE
Features
Broad bandwidth of 500 KHz at full signal quality
Excellent immunity to interference
error compensation
21 - 30 of 40


Frequently asked questions

A rotary encoder, often referred to as simply a shaft encoder, is an electro-mechanical device that converts angular positioning into output signals. Rotary encoders can be broadly segmented by their feedback type as incremental or absolute.
Rotary encoders translate the mechanical rotational motion of an object such as a motor shaft into an electronic signal. Optical rotary encoders measure rotation by shining a LED light through a disc with markings onto an optical sensor to detect motion. Magnetic rotary encoders use a similar principle but measure motion as a magnetized wheel turns and is detected by a magnetic sensor. 
Incremental rotary encoders output a stream of ubiquitous pulses over 360 degrees of rotation, hence the term pulses per revolution of PPR. Incremental rotary encoders can have one channel output (A), two channel output (AB, known as quadrature) as well as an optional index channel (Z).

Absolute rotary encoders output a unique digital word or bit for each position over 360 degrees of rotation. This digital word must be communicated in the same language as the controlling system with options including parallel, serial, field bus and ethernet based communication protocols.

Rotary encoders should be used in any application that requires precision motion control. While a power can be supplied to a motor to make it turn, to control exactly how fast it actually turns  requires real time feedback so that the controlling device can increase or decrease power to achieve a consistent motor speed or shaft position. Rotary encoders are therefore indispensable in precision motion control applications including servo motor feedback, robotics, factory automation and more.
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