Abstract: A fluidic-oscillator type flowmeter has an inlet nozzle (1) leading into a chamber (2) with diverging side walls (3a, 3b). A splitter (8) has a blunt end opposite the inlet nozzle and defines outlet paths (4a, 4b) which lead from the chamber. The shape and position of the splitter are such that oscillating flow is encouraged across its face. Feedback channels (5a, 5b) lead from the side walls back to control ports (7a, 7b) which open into the chamber. The relative position of the splitter and feedback channel entrances is such that the downstream corners of the entrances to the feedback channels lie in the oscillating path of the edge of the flow which separates from the face of the splitter when the meter is in use.

Abstract: A siphon weir having a downwardly directed inlet port and a lower lying outlet port (18) on the downstream side connected with it by means of an approximately S-shaped siphon line (13) contains a ventilating mechanism for improving the regulating behavior. The ventilating mechanism is preferably constructed as a linear, sloping ventilating pipe (46), which is led out of the interior of the container to be regulated through the rising leg of the siphon line (13) and issues below the siphon top in the downwardly leading falling leg of siphon line (13). A diverter (28) for floating material can be mounted on the upper end of ventilating pipe (46).