To provide a rotary feedthrough capable of indicating the condition of the rotary feedthrough.
The magnetic fluid rotary feedthrough 100 includes a multi-stage magnetic fluid rotary seal adapted to provide a magnetic fluid seal 160 about a shaft for extending between a first environment and a second environment; a combination of one or more sensors integrally mounted within the magnetic fluid rotary feedthrough to sense one or more physical parameters of the multi-stage magnetic fluid rotary seal; a signal processing electronics mounted to or incorporated in the magnetic fluid rotary feedthrough to process one or more sensor output signals from the one or more sensors 210 and to output one or more electronic processing signals; and one or more output devices 220 electrically connected to receive the one or more electronic processing signals from the signal processing electronics to indicate the condition of the multi-stage magnetic fluid rotary seal.
LEWCOCK JEFFREY C
JOHANSEN DAVID
