| 摘要 |
PROBLEM TO BE SOLVED: To obtain a liquid level controller which obtains an accurate level of liquid whose temperature has been corrected by measuring pressure to avoid the poor influence to the liquid, operates a drain pump based on the liquid level, and controls the liquid level of a waste water tank, each kind of waste liquid pit, and the like. SOLUTION: The liquid level controller 101 comprises a liquid level-measuring tube 3 which is arranged so that it can be submerged into liquid 2 freely so that a 0 position B at the lower section of a reference position A at the bottom of a waste liquid tank 1 is reached, a differential pressure sensor 8 which is connected via a conduit on the upper surface of the liquid level-measuring tube 3, a temperature correction measurement tube 5 which is provided side by side with the liquid level-measuring tube, a temperature correction pressure sensor 9 which is connected to the upper surface of the temperature correction measurement tube 5 via a conduit, an operation input means 12, a storage means 13, a liquid level operation means 14-2 for calculating a liquid level ha in the waste liquid tank 1, and a pump control means 15 which discharges the waste liquid 2 to the outside of the waste liquid tank 1 based on each kind of setting value such as the calculated liquid level ha, and a dangerous liquid level and a pump operation liquid level that are stored, and operates and controls an appropriate number of drain pumps 11 so that a specific liquid level range is reached.
|
