Accurate Technology (ATI) manufactures ProScale, ProScaleABS, and other measuring devices based on the capacitive coupling technology (the same technology used in high accuracy digital calipers).

The company's first product was a general purpose measuring device called ProScale. As the company expanded, the product line grew, with new products every year. In 1996, ATI introduced ProScaleABS, an absolute position measuring device. Absolute systems use a more robust and sophisticated method to measure position, resulting in a high immunity to electrical interference and one that does not forget its position.

ProScale digital measuring systems are high-precision electronic devices for making linear measurements with speed and accuracy, consisting of a scale, a readhead, and a digital display. The scale consists of a series of conductive patterns on a non-conductive substrate. The readhead contains a computer chip which transmits and receives signals to the scale using capacitive coupling (without actually touching the scale). The received signal is used by the computer chip to calculate the readhead position to 0.01mm precision. This position data is sent to the digital display, where it can be displayed in fractions, decimal inches, centimeters, or millimeters.

ProScale is compatible with most machines for dimensioning wood, metal, plastic or composite materials. For example, one could measure lengths and widths for a vertical-panel saw, set cutting depth for a router, or set the position of a traverse axis on a tenoner. ProScale is also ideal for setting the position of fences, stops, and cutters.

Because ProScale shows the exact measurement on its display, it eliminates the guesswork involved in reading and interpreting tape, pointer, or shaft encoder scales. ProScale also speeds up measurement taking. As a result, machine setup time can be reduced considerably, maximizing throughput on the machine.

ProScale is extremely rugged and durable. Unlike optical measurement systems, the accuracy of capacitive measuring systems is not affected by sawdust or other non-conductive contaminants. Additionally, power consumption is much less than magnetic or optical measurement systems. And because ProScale is a solid-state electronic device there's very little to wear out. The readhead and scale are designed to withstand shop dirt, dust, and other airborne contaminants, and the controls are sealed with a protective cover for long life. With normal care, ProScale will last for years.