As of March 26, 2010 Joliet Technologies is no longer representing the Avtron line of products.

We do however represent the Dynapar line of Rotary Feedback Products.

Avtron – Tachs, Tachometers, Encoders, Rotary Pulse Generators

Joliet Technologies is the preferred Avtron Integrator for the Chicagoland area.

Tachs, Tachometers, Encoders, Rotary Pulse Generators 

Severe Duty Encoders


The Avtron Model M485 SMARTachTM rotary pulse generator is a severe duty, speed and position transducer. When coupled to a motor or machine, its output is directly proportional with respect to position (pulse count) or speed (pulse rate). The M485 can be used for both control and instrumentation applications.

View the M485 Brochure or Instruction Sheet

Solid Shaft Encoder and Hollow Shaft EncoderCheck the availability of this model. Visit Tachometers Availability for more information.


The Avtron Model M685 SMARTach rotary pulse generator is a severe duty speed and position transducer. Its output is directly proportional to shaft position (pulse count) or speed (pulse rate). The M685 can be used for both control and instrumentation applications.

View the M685 Brochure or Instruction Sheet

Speed Feedback and Overspeed Protection from One Assembly!

Overspeed Switch on SMARTach M685

SMARTachTM is a trademark of Avtron Manufacturing, Inc.

  • Avtron Mfg. can now offer a SMARTach(TM) Digital Pulse Generator and an Overspeed Switch on a common shaft for a simple, reliable, installation of two critical components for any large frame AC or DC motor.
  • BENEFIT:  No couplings or alignment issues.
  • BENEFIT: No belts to fail.
  • BENEFIT: Quick installation and simple maintenance.
  • BENEFIT: Overspeed Switch trip points preset at factory.
  • BENEFIT: Digital Tachometer has replaceable sensors with built-in diagnostic LED indicator option for fast troubleshooting and replacement without the need to remove the entire assembly.
  • Available with our M485 or M685 SMARTach Digital Pulse Generators.
  • Standard or Custom Stub Shafts available for any motor make.

Built-in Diagnostic Indicator

Avtron has developed a Built-in Diagnostic Indicator for use on the SMARTach product line. This new product feature provides a visual confirmation of proper Encoder operation without having to interrupt the process. One look tells it all.

SMARTachTM is a trademark of Avtron Mfg., Inc.

M485 with LED
SMARTach with Diagnostic Indicator. View the Brochure

Call Joliet Technologies TODAY 

If you have any questions concerning Avtron’s Tachs, Encoders, and Pulse Generators, please contact us by:
Phone (815) 725-9696,
Toll Free (866) 492-9888,
Fax (815) 725-9393 or

Joliet Technologies custom packages, integrates and engineers AC Variable Frequency Drives (VFD), DC Variable Speed Drives (VSD) and AC Drive Controllers using top of the line manufacturers, like ABB, Emerson-Control Techniques, Siemens and Saftronics (Fincor). Our custom drive packages are built to your specifications for your application. We specialize in large horsepower drive systems (500Hp and above). Call us at (815) 725-9696 or fax us at (815) 725-9393 or e-mail us or fill out an RFQ with your requirements. Serving the greater Chicagoland area and the World.

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