US Digital Introduces High Resolution E4T Optical Encoder with 400 and 500 CPR

Vancouver, WA - US Digital, a US manufacturer of quality motion control since 1980, today announced the addition of 400 and 500 cycles per revolution (CPR) resolutions to its existing E4T line of miniature optical encoders. Specifically designed for robotics, medical and other industrial automation applications, the new E4Ts deliver position and velocity feedback, while fitting National Electrical Manufacturers Association (NEMA) motors as small as size eight.

Utilizing state of the art transmissive optical sensing technology, the newly announced 400 and 500 CPR resolutions represent up to a 38% increase in available CPR and now support applications requiring up to 2000 pulses per revolution. This substantial increase in resolution was achieved without any compromise to package form factor, electrical characteristics or output signal robustness. The E4T line of encoders is available in both single ended and differential signal outputs for applications where noise immunity is critical. Moreover, the 400 and 500 CPR options retain the E4T’s simple and efficient, push-on hub disk assembly process, helping US Digital customers keep installation time, assembly cost and complexity to a minimum.

Product Features:

10 resolutions up to 360 CPR, plus new 400 and 500 CPR resolution
288 configurations available, including single and differential output
Compact form factor
0.866 inch (in) / 22.00 millimeter (mm) package outside diameter
0.446 in / 11.33 mm package height
Fits NEMA 8, 11, 14 and 17 motors
Simple and efficient assembly process
Four-piece construction
Push-on hub disk design, patent pending
100 kilohertz frequency response
Shafted version up to 0.25 in / 6.25 mm diameter

To learn more about the E4T product line, visit

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