| 摘要 |
PURPOSE:To measure accurate temperature regardless of the displacement of a liquid level by measuring the temperature of liquid at constant depth from the liquid level by a temperature sensor all the time. CONSTITUTION:The lead wire 20 of the temperature sensor 4 is connected to a connection part 12 by a lead wire 8 with a subsidiary wire, and the lead wire 9 is led out of the float 1 through a lid 9, the hole 11 of a cover 10, and a seal material 15 and connected to a control part for a cooling tower, etc. The float 1 is floated in a water tank 17 and then moves up and down according to fluctuations of the water surface, and the temperature sensing part 4c of the temperature sensor 4 is at a necessary position below the water surface all the time and measures the water temperature, thereby sending its measurement signal to the control part through the led wire 8. At this time, the cover 10 is made of a heat insulator such as styrofoam, so the inside of the float 1 prevents the temperature from rising owing to the radiant heat of the sunshine and external air temperature, and also eliminates dew condensation due to variation in the external air temperature and water temperature, so the temperature sensor 4 accurately performs the measuring operation.
|
