PIPET FOR CONFIRMING LIQUID AMOUNT AND LIQUID AMOUNT CONFIRMING METHOD AND APPARATUS USING SAID PIPET

摘要

PURPOSE:To reduce the number of parts and to make it possible to accurately confirm a liquid amount without bringing about an increase in cost, by alternately arranging a light transmitting part and a light blocking part with respect to a pipet at an equal interval along the longitudinal direction of said pipet. CONSTITUTION:When a specimen 50 is sucked up into a pipet P through a suction pump, the specimen 50 is sucked into the pipet P and, therefore, the specimen 50, air (a) and a liquid (w) extruding the specimen such as washing water are received in the pipet P from below in this order. Thereafter, the control signal from a control part 57 is outputted to a drive circuit 55a and a bracket 55 begins to fall and a light emitting element 52 emits light of which the photoelectric conversion voltage is 5V to scan the pipet P. As a result, the voltage signal outputted from a light receiving element 53 forms a pulse like wave form. A series of these pulse like wave forms are inputted to the control part 57 through an A/D converter 56 and operational processing is performed to calculate the amount of the specimen 50.