If you use an impeller design, it can be made as a sealed unit by having =
an impeller with metallic or magnetic blade tips, sensed from outside a =
non metallic tube using an inductive proximity detector.

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Mark Hull
Engineering / Technical
EMS (Africa) (Pty) Ltd
PO Box 1026, Melville, 2109, South Africa
Ph + 27 11 482 4470, Fax +27 11 726 2552

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