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Flow measurement device

  • US 4,938,072 A
  • Filed: 07/13/1989
  • Issued: 07/03/1990
  • Est. Priority Date: 01/21/1987
  • Status: Expired due to Term
First Claim
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1. A flow measurement device having a tube or other container for receiving a flow of a liquid, a plurality of sensers associated with the container to sense when the liquid reaches a level in the container corresponding to each senser, and a timing device deriving a time difference between sensing of two levels, characterised in that there are more than two sensers and in that logic means associated with the timing device checks whether the time difference exceeds a predetermined minimum and if so calculates the flow rate from that time difference but if not inhibits that calculation and arranges for a time difference derived from a subsequent senser to be used in calculating flow rate.

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