The DS‐247‐128 is members of the DS series, based on Netzer Precision Electric Encoder™ technology. This state‐of‐the‐art encoder technology offers many features, some unparalleled: - Hollow floating shaft - No bearing or other contact - High precision. - High tolerance to temperature, shock, moisture, EMI, RFI and magnetic fields. - Multiple protocol interface - Continues output The absence of ball bearings and components such as flexible couplers, glass disc, light sources and detectors, along with very low power consumption makes the DS‐247 encoder virtually failure free. The internally shielded, DC operated DS‐247 includes an electric field generator, a field receiver, a sinusoidal‐shaped dielectric rotor, and processing electronics