Method of monitoring the presence or absence of liquid and appar

Details Method of monitoring the presence or absence of liquid and appar Method of monitoring the presence or absence of liquid and appar

1993-05-12

1994-10-18

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356338, 222 66, G01N 1506

Patent

active

053571177

ABSTRACT:
A method of monitoring a discharge of a liquid comprises the steps of: measuring a presence or absence of a liquid discharged at an optional area of a passage for the liquid during discharging the liquid of a vessel through the passage; comparing a measurement result obtained in said measuring step with a reference measurement result which are to be obtained when a discharge of the liquid is reliably carried out; and determining as to whether a discharge operation for the liquid has been reliably performed. And an apparatus for performing the method.

REFERENCES:
patent: 4038982 (1977-08-01), Burke et al.
patent: 4644755 (1987-02-01), Esslinger et al.
patent: 4794806 (1989-01-01), Nicoli et al.

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