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Water Specialties Ceramic saddles engineers designed their meter-head assemblies to be bolted directly into the existing saddle or meter Silicon carbide ring tube of virtually any brand of flowmeter while in the field without the need to remove the flow tube from the piping system. The new meter heads contain a propeller mounted on a ceramic sleeve on catalyst carrier a ceramic-coated, stainless-steel spindle; both materials are corrosionand abrasion-resistant. The propeller is turned by the flow, and a magnetic pickup creates a signal sent to a microprocessor in the meter head, which in turn can send the signal to a central computer.