| 摘要 |
PROBLEM TO BE SOLVED: To provide a sample water feeder by the control of the head vessel of a dissolved oxygen meter constituted so as to control a flow rate by detecting the level of the head vessel to a always allow water to overflow and to always supply a necessary amount of water to an analyzer to obtain a stable measured value. SOLUTION: In the sample water feeder by the control of the head vessel of the dissolved oxygen meter, the level of head vessel is detected and the inlet valve 5 of the flow channel to the head vessel 8 is automatically subjected to on-off control corresponding to the detected level. COPYRIGHT: (C)2007,JPO&INPIT
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