Abstract: A fluid flowmeter comprising a rotor mounted in a chamber for rotation about a predetermined axis of the chamber by flow of fluid through the chamber. The fluid enters the chamber in use at or near both poles of the axis in a plurality of separate flows parallel to and including the polar axis and leaves the chamber at an equatorial region of the chamber relative to the axis. The rotor is supported during movement in the chamber solely by means of fluid flow there through. The flowmeter is further provided with means for sensing the rate or amount of rotation of the rotor without physical contact therewith.

Abstract: A level determining-device wherein a chain is suspended from a mechanism which is adapted to raise and lower the chain. Means are provided for sensing the weight of a part of the chain hanging freely from the mechanism, whereby the length of the freely hanging part, and hence a desired level, can be determined.