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/Incremental Encoder - ICURO RI58
Diameter
58 mm
Resolution
Number of Pulses: 1 ... 10000
Solid- / Hollow Shaft
Hollow 6 ... 15 mm, Solid 6 ... 12 mm
Protection case
IP40 / IP50 / IP64 / IP67
Interface
Push-pull, Push-pull complementary, RS422
Approval
UL, CE
Features
up to 10,000 pulses
-25°C to +85°C
max. 10,000 rpm
up to IP67
Aluminium housing
/en/f_c1003/Encoder/ACURO AC36 - Absolute Encoder
Diameter
38,1 mm
Resolution
ST: 12 ... 19 Bit
MT: 12 Bit
Solid- / Hollow Shaft
Hollow 8 mm, Solid 6 mm
Protection case
IP50 / IP64
Interface
BiSS / SSI
Approval
UL, CE
Features
-40°C to 100°C operating temperature
10,000 rpm in continuous operation
Optional sinus 1 Vss
/en/f_c1003/Encoder/ICURO RI76 Incremental Encoder
Diameter
76 mm
Resolution
Number of Pulses: 20 ... 10000
Solid- / Hollow Shaft
Hollow 15 ... 42 mm
Protection case
IP50 / IP64
Interface
Push-pull, Push-pull complementary, RS422
Approval
UL, CE
Features
up to 10,000 pulses
Hollow shaft with Ø up to 42 mm
IP64
/en/f_c1003/Encoder/ACURO AR62 - Absolute Encoder
Diameter
58 mm
Resolution
ST: 12 Bit
MT: 12 ... 16 Bit
Solid- / Hollow Shaft
Solid 9,52 ... 12 mm
Protection case
IP67 / IP 69K
Interface
BiSS / SSI, Analog, CANopen
Approval
UL, CE, E1, DNV
Features
-40°C to +100°C operating temperature
IP69K
12 bit single-turn and 16 bit magnetic multi-turn
/en/f_c1003/Encoder/ACURO AR63 - Absolute Encoder
Diameter
58 mm
Resolution
ST: 12 Bit
MT: 12 ... 16 Bit
Solid- / Hollow Shaft
Solid 9,52 ... 10 mm
Protection case
IP67 / IP69K
Interface
BiSS / SSI, Analog, CANopen
Approval
UL, CE, E1, DNV
Features
-40°C to +100°C operating temperature
IP69K
12 bit single-turn and 16 bit magnetic multi-turn
/en/f_c1003/Encoder/ICURO RI64 Incremental Encoder
Diameter
63 mm
Resolution
Number of Pulses: 1000 ... 4096
Solid- / Hollow Shaft
Hollow 10 ... 16 mm
Protection case
IP64 / IP67
Interface
Push-pull, Push-pull complementary, RS422
Approval
CE
Features
up to 4096 pulses
Insulated shafts
Hollow shaft with Ø up to 16 mm
IP67
/en/f_c1003/Encoder/ACURO AD36 - Absolute Encoder
Diameter
38,1 mm
Resolution
ST: 12 ... 22 Bit
MT: 12 Bit
Solid- / Hollow Shaft
Hollow 8 mm
Protection case
< IP40
Interface
BiSS / SSI
Approval
UL, CE
Features
-40°C to 120°C operating temperature
10,000 rpm in continuous operation
Optional sinewave 1 Vpp
/en/f_c1003/Encoder/ICURO RI36 Incremental Encoder
Diameter
36 mm
Resolution
Number of Pulses: 5 ... 3600
Solid- / Hollow Shaft
Hollow 4 ... 10 mm, Solid 4 ... 6,35 mm
Protection case
IP50 / IP64
Interface
Push-pull, RS422, and 2 more
Approval
UL, CE
Features
up to 3600 pulses
-10°C to +70°C
10,000 rpm
IP64
pulse frequency up to 300 KHz
/en/f_c1003/Encoder/ACURO AD34 - Absolute Encoder
Diameter
38,1 mm
Resolution
ST: 12 ... 19 Bit
MT: 12 Bit
Solid- / Hollow Shaft
Solid 6 mm
Protection case
< IP40
Interface
BiSS / SSI
Approval
UL, CE
Features
-15°C to 120°C operating temperature
10,000 rpm in continuous operation
Optional sinewave 1 Vpp
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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.