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NorthStar RIM Tach Encoder Tachometer Family

The NorthStar RIM Tach encoder tachometer line (formerly Lakeshore encoders) was originally introduced 20 years ago to provide the highest performance encoder solution for large motor and drive control systems in paper and steel mills. The next generation of NorthStar motor encoder tachometers offer the most reliable magnetic technology on the market thanks to a large non contacting air gap, active LED indicators with diagnostics, fully encapsulated electronics and field replaceable sensor modules for the RT8 and RT1 models. A high current line driver with active line suppression, reverse polarity and ESD protection is also available for RT models allowing for reliable operation and long cable runs.

Replacing Another Brand? Dynapar has fast delivery and great prices. Request Crossover Have a Part Number? Request a Quote

Next Gen RIM Tach Encoder Tachometers

Hollow-Shaft Magnetic Encoders

HT55 Large Bore Magnetic Encoder

Hollow-shaft magnetic encoder with max bore size 2.875". Designed for easy installation with tough construction. Resolution up to 4,096 PPR.

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HT85 Large Bore Magnetic Encoder

Hollow-shaft magnetic encoder with max bore size 4.5". Designed for easy mounting and to survive tough environments. Resolution up to 2,400 PPR.

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Discontinued NorthStar and LakeShore Motor Tachs Replacement Guide

Discontinued Part Crossover Guide

Find a replacement for a discontinued NorthStar or Lakeshore motor tach model and the current generation recommended replacement.

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Frequently Asked Questions about Encoder Tachometers

What is an encoder tachometer?

An encoder tachometer is a digital version of the original tachometer, known as a precision voltage generator, whose voltage raised and lowered proportional to the speed by which the shaft was turned.

How does a tachometer work?

A tachometer works by a sensor picking up the magnetic poles that are imprinted upon the round wheel and act as “bumps” that go by the magnetic sensor. The sensor detects those bumps and converts them into digital signals.

Learn more about magnetic encoder tachometers work here

What is the difference between an encoder and tachometer?

Tachometers only provide speed feedback and can save costs in applications where more functionality is not required. Encoders are more versatile than tachometers providing analog or digital signal along with direction, position and velocity feedback.

Learn more about incremental encoder output here

How to replace a tachometer with an encoder

In most cases, replacing a tachometer with an encoder is easy, but it is important to consider mechanical features such as mounting and axial/radial size limitations and what electrical signal your drive will accept. Encoders output digital signal, which will require a drive that accepts this input.

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