Severe Mill Duty Hollow Shaft Encoder
AVTRON AV685 Severe Mill Duty Hollow Shaft Encoder
PDF icon Instruction Manual (911.96 KB)

AV685 hollow shaft Magnetic Encoders, with 1-1/8" Hollow Shaft Mount survive the worst conditions: dust, dirt, liquid sprays, and temperature extremes from -40°C* to +120°C*!

The durable hollow shaft design tolerates huge axial movements and withstands more shaft runout than standard encoders.


  • Protection from: short circuit and reverse voltage, surges
  • Resistant to noise interference with large sensor air gap
  • Cable lengths up to 300m
  • Encapsulated electronics IP67
  • Max 5000 rpm
  • Max temp 120C

Diagnostic status indication.

A Green LED signals correct alignment with the rotor and reading signal. If the AV5 cannot produce consistent signals, the LED turns Red, activating an optional remote alarm contact. Despite this, the encoder continues to function, giving time to schedule service. An Orange LED indicates errors such as wiring issues or over-temperature conditions.

The dual, replaceable sensors have fully potted electronics and are interchangeable between AV485, AV685, and AV850. And, they feature high-power outputs that drive long cable lengths easily. These AV5 SMARTach III sensors have the best protection of any encoder—from surges, wiring outputs to power, ground, between phases, or even short circuits!

The universal 5-24V design drives longer cables and is protected against wiring errors and surges.

Can’t find what you need?

Call ADM on 1300 236 467

A member of our expert team will gladly help you find the right solution for your project or application.