For the most productive optical rotary encoder search, we recommend making your selections in the following order: Line Count, Commutation, Bore Size.

Please contact us if you are unable to find the appropriate optical encoder that you are looking for.

For an explanation of What is an Optical Rotary Encoder – please see the bottom of this page.

QM35 EZ-COMM

QM35 EZ-COMM

Bearingless modular design
1.44" Dia.
Low Profile 0.43" H
Programmable Commutation Alignment

QM35

QM35

Bearingless modular design
1.44" Dia.
Low Profile 0.43" H
1Mhz Frequency Response

QML35

QML35

Bearingless modular design
1.44" Dia.
Low Profile 0.43" H
1Mhz Frequency Response

QM22

QM22

Bearingless modular design
Multiple commutation options
Miniature Package Size
500kHz Frequency Response

QR145

QR145

1.45" Dia., .87" H
Flying Leads Cable
Incremental & Commutation
High Temperature & Sealed options

QR200

QR200

2.00" Dia., .93" H
Flying Leads Cable
Incremental & Commutation
High Temperature option

QR12

QR12

1.22" Dia, .99" H
Highest resolution encoder
Incremental, Commutation
Standard JAE Connector

LP12

LP12

1.22" Dia 0.82"H
Incremental or Sin/Cos
Low Profile, 0.816" H
High Resolution

HR12

HR12

1.42" Dia 1.12"H
HEDS compatible
IP52 Sealed
Incremental, Commutation

JR12

JR12

1.22" Dia .99"H
Jam Nut Mounting
Size 15 Resolver Style
Incremental, Commutation

QR787 w/ Shaft

QR787 w/ Shaft

Incremental Solid Shaft
Ideal for potentiometer replacement
Female or Male connector options

QR787 w/ Blind Bore

QR787 w/ Blind Bore

Incremental Hollow Shaft
Ideal for potentiometer replacement
Female or Male connector options

QR110

QR110

1.062" Dia .82"H
Incremental
Ideal for size 11 resolver replacement
Female or Male connector

QDH20

QDH20

Size 20 & 25 Flange and Servo
For Industrial Applications
IP66 & IP64 Sealing
Cable Gland or MS Connector

What is an Optical Rotary Encoder?

Optical Rotary Encoders, also known as shaft encoders, are electromechanical position feedback devices. The output data they generate provides information to control systems and allows them to determine position, speed, acceleration, deceleration and travel distance in motion control applications.

An optical encoder consists of the following components: a moveable disc, an LED (Light Emitting Diode) source, a photo detector and a signal processor that converts the analog waveforms to digital waveforms.

The encoder disc, or code wheel, has a pattern of spaces, called windows, on it. When the LED light passes through one side of the disc, the photodiode detects interruptions. The photodiode creates analog signals which are processed and digitized for use by external control devices.

Industrial and Commercial Applications that Utilize Optical Rotary Encoders:

  • Aerospace & Defense
  • Automated Guided Vehicles (AGV)
  • Autonomous Mobile Robots (AMR)
  • Conveyor Applications
  • Elevators
  • Factory Automation
  • Galvanometer Scanners
  • Industrial Controls
  • Medical Devices
  • Off-Highway Vehicles
  • Oil & Gas
  • Passenger Rail
  • Pulp & Paper Mills
  • Robotics
  • Rotating Radar Platforms
  • Servo Motors
  • Steel Mills
  • Stepper Motors
  • String Potentiometers
  • Wood Processing

Since 1989, Quantum Devices, Inc. has been known for their rotary encoder manufacturing innovation. Their full line of high performance encoders fit a wide variety of industries and applications. To find out which rotary encoder would be best for your specific application, contact Quantum Devices today!

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