Blood fractionation apparatus having collection rate display system

摘要: An apparatus for separating and collecting plasma from whole blood includes a collection rate monitoring system which provides digital display of the per minute. A transducer circuit within develops an electrical signal frequency-dependent on weight collected plasma. The frequency this over present measurement interval is periodically compared with preceding to develop indicative volume during interval. This combined in shift register signals developed plurality immediately intervals, which, taken interval, comprise one minute period, at end each output total units previous counter responsive produces In illustrated embodiment, second, increment fifty-nine increments are obtain readout