This device sends out a pulse signal every 1 meter, 0.1 meter (10 centimeter), 0.01 meter(1 centimeter), or 0.001 meter (1 millimeter) when its two measuring wheels are put on running materials such as cloth, paper, belt, metal sheet, plastic film, etc., or when the wheels are put on a roller rotating synchronously with a running material.

The length measurement value can be displayed on an electronic or electromagnetic counter.

This device can be installed at a most suitable place away from the registering counter. With a preset counter, this device can control accurate cut-to-length or repetitive operations. With quadrature output signal, the device can be used to get the relative length even with bidirectional movements