ATOM DX™ 20 μm pitch, rotary, cabled readhead (2.5 nm resolution, 3 m cable, 15-way D-type (alternative pin-out) termination, 20 MHz clocked output, and 3-state alarm) for use with RCDM20 optical diameter ≥ 26.1 mm to < 31.4 mm | Renishaw Online Store