| 摘要 |
PURPOSE:To improve accuracy of measured values, by constructing the device with an inner tube with an inlet port retractable toward an electrode chamber by a cylinder mechanism and a means of supply of a constant volume of solution into the inner tube. CONSTITUTION:When ground water is introduced into an electrode chamber 20 through a guard mesh 23, distilled water existed in the special electrode 21 at the center id diluted by in-coming ground water by replacement and distilled water is gradually pushed outward of the chamber 20 through a number of through holes from the special electrode 21 located at the center of the chamber 20 and when reaching any of electrodes 22 arranged radially, as resistance values of the electrodes 22 are changed, slow-speed and flow direction of ground water corresponding to attitude and time of the change can be measured. Further, when the measuring operations of the flow speed and direction are finished and a renewed measurement is attempted, pressure liquid is introduced into the upper chamber 11 of the cylinder for lowering a cylinder 10 and insertion of an inner tube 15 into the electrode 21, a valve 18 is opened and a valve 19 is closed for filling distilled water in the tube 15 and allowing distilled water to remain in the electrode and thus, repeated measuring operations become available. |
