Simply fill out the form below, and continue Download!


RL Shaft Encoder


Features and Options:

  • Heavy duty bearings
  • 3/8", 1/2", 5/8" & metric shaft diameters
  • Exclusive anti-jitter and enhanced anti-jitter option
  • DC or AC supply voltages
  • 1 to 1344 counts per revolution
  • USAMade in the USA



Product Description

The Model RL rotary shaft encoder is sold with an option of several different sized diameter shafts and bearings and was designed for heavy duty applications where a rugged, face mounted encoder is required. When coupled to a rotating shaft, either directly or using a timing belt, it converts shaft rotation into square wave outputs with the specified number of counts per revolution providing an accurate means of digitizing position, rate or direction of rotation.

Output pulses are generated when a shatter-proof optical disk internally mounted on the encoder shaft and having the specified output pattern is read by 1, 2, or 3 opto-sensors depending on the number of outputs required. The matched LED and opto-sensor pairs, compensation circuitry and rugged aluminum housing assure continuous, reliable operation in industrial environments over a 0° to 70° C temperature range.

Resolutions from 1 to 1344 counts per revolution are available in single output, quadrature output, and with optional zero reference (index output). We also produce many customized models having 1, 2 or 3 independent outputs with any combination of counts per revolution (up to 360) on each output (call for information).

The “Anti-Jitter” option was designed for conveyor and web applications that require continuous and accurate measurement of the web's movement even if the system must be stopped and restarted without reset. “Anti-Jitter” eliminates the effects of mechanical vibration and the possible dither that results in false output pulses and subsequent erroneous counts when the system is actually “stopped”. It also eliminates the need for more expensive quadrature encoders and up-down counters. “Anti-jitter” is available on single output models.

Accessories and customized configurations are available including speed and direction of rotation indication, measuring wheels, special shafts, mounting brackets, and flexible couplings.

Industry Use

Conveyor Manufacturers Custom Machine Builders Packaging Material Handling
Automated Scales      

Product Documentation

Additional Information

View FileDatasheet
View FileDrawings

Shaft Options
Output Types
Counts per Revolution Options
Anti-Jitter Option
Supply Voltage Options
Output Circuits

Modified Versions

Modification Description  
M72 3/8" shaft diameter, 3/4" shaft length with flat View FileDatasheet
M96 M4 x .7 mounting holes View FileDatasheet
M105 8mm shaft diameter, 20mm shaft length with flat, M4 x .7 mounting holes, 3-pin connector View FileDatasheet
M129 Encoder with 2 independent, single output circuits View FileDatasheet
M131 Encoder with M12 4-pin connector View FileDatasheet
M134 3/8" shaft diameter, 1-9/16" shaft length with 2 flats at 90 degrees View FileDatasheet
M139 Single output encoder with Enhanced Anti-Jitter feature View FileDatasheet
M141 Recessed shaft retaining ring (standard feature before September, 2000) View FileDatasheet
M152 8mm shaft diameter, 39mm shaft length with flat View FileDatasheet
M153 3-pin connector View FileDatasheet
M164 Encoder with LED status indicator View FileDatasheet
M174 3/8-16 threaded shaft View FileDatasheet
M191 1/4-20 threaded shaft View FileDatasheet
M194 6-pin connector View FileDatasheet

For our programmable Shaft model, please see our RL-P Programmable Shaft Encoder. For our Hollow Shaft model, please see our HRL Hollow Shaft Encoder.