Sato RH1730900 M8459S Label Sensor Card Board

RH1730900 is the lower label sensor PCB board for SATO's M-84XX printer family, spanning models M8459S, M8485S, M8485SE, M8490SE, and M8490S, and it provides the dedicated sensor module located along the label path to detect label presence as media advances, supporting reliable detection during peak production runs. As an OEM SATO part, it is cataloged in spare-parts listings as the Label Sensor Lower PCB Board used with the M-84XX line, and multiple distributors—BarcodesInc and TamayaTech among them—explicitly identify RH1730900 as the compatible lower-label-sensor component for these printers. The component is documented with PCB revision 1.3, indicating a current revision appropriate for service and replacement within the M-84XX family, which helps ensure compatibility with existing main-board interfaces and sensor wiring in these printers. Availability across reputable SATO spare-parts suppliers confirms its role as a recognized replacement part for the M8459S, M8485S, M8485SE, M8490SE, and M8490S label-sensing subsystem, helping technicians source an authentic part without substituting broader printer assemblies.