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3531_0 Optical Rotary Encoder HKT22

Product Code: 3531
Excl. VAT: £27.54 Incl. VAT: £33.05
  • Buy 5 for £24.91 (£29.89 incl. tax) each and save 10%
  • Buy 10 for £24.30 (£29.16 incl. tax) each and save 12%
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  • Buy 100 for £21.26 (£25.51 incl. tax) each and save 23%
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This low-cost encoder is designed to fit on the rear shaft of our stepper motors. Measure the rotation of your motor even when it stalls or missteps.



  • 0.9 mm Hex Key for set-screws

  • Plastic encoder cap and mount

  • Encoder disk

  • Encoder PCB

  • Two screws

  • 3035 - Cable for HKT22 Encoder

This compact, economical optical quadrature encoder can be attached to the 4mm rear shaft of a motor. It has 300 counts (full quadrature cycles) per rotation and can be installed by fitting it over the shaft, mounting it to the back of the motor, and tightening the set-screw. This encoder does not support the use of an index channel.


The mounting holes on the HKT22 encoder line up with the holes on the back of any rear-shaft stepper motor from Phidgets, Inc. It connects to any of the following interface boards via the included cable:

Encoder Properties

Output Circuit Type Push-Pull (Single-Ended)
Encoder Resolution 300 CPR


Electrical Properties

Supply Voltage Min 5 V DC
Supply Voltage Max 5 V DC
Output Frequency Max 30 kHz


Physical Properties

Shaft Diameter 4 mm
Operating Humidity Min 30 %RH
Operating Humidity Max (Non-condensing) 85 %RH
Operating Temperature Min -10 °C
Operating Temperature Max 85 °C
IP Rating IP40
Weight 4 g

Product Attachments

View File3531 Datasheet    Size: (200.19 KB)
View File3531 Mechanical Drawing    Size: (41.75 KB)
View File3531 3D Step File    Size: (100.95 KB)

Whenever possible, items which are in stock are dispatched the same day, or the next working day.

Large and/or heavy items are dispatched by UPS courier service and these orders must be placed before 15:00hrs (GMT) to ensure same day dispatch.

Small items are normally sent using a Royal Mail service for UK orders, and International Airmail or UPS for overseas orders

Returns Policy

3531_0 Optical Rotary Encoder HKT22

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