fy= output frequency provortional to v, cycle 
per second 
= path length in liquid, meters 
= time delay in electronic circuitry, sec- 
onds 
v = speed of current flow, meters ner second 
L 
t 
REP RR ENCS 
1. 4H. P. Kalmus, "Electronic Flowmeter Sys- 
tem", PEV. SCI. INST., Vol. 25, Now 3, 
ppe 201-206, March 195). 
FIG. 2 
193 
