Measuring the vacuum at the hose nozzle on the kitchen floor may require
something a bit more sophisticated than just taking a reading at the nozzle,
since there needs to be a significant flow, but partial blockage, for the
vacuum to lift any dirt. (the gap of the nozzle at the floor relates to how
effectively the appliance pulls in dirt). With the nozzle elevated to 3"
above a floor/hard surface, would create a dramatic difference in
Something similar to a leakdown tester comparison may be helpful, indicating
readings of the actual vacuum at the appliance inlet, and simultaneous
reading at the nozzle on the floor with some percentage of restriction to
Partial blockage of the flow generally results in the turbine motor speeding
up (powered with a brushed universal motor), so that's another factor, I
Vacuuming dirt from a horizontal screen surface would be a horse of a
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