PROBLEM TO BE SOLVED: To provide an underground water level gauge which has the function of preventing electrolytic corrosion and the function of avoiding a malfunction due to waste and worms with low power consumption to detect the underground water level of cultivated land.SOLUTION: A water detection section in which sets of opposite electrodes are arranged at equal intervals is applied with electric current only during measurement, an output section in the final output stage holds an analog signal, and a signal processing section located between the water detection section and the output section stands by in a sleep state other than during measurement.COPYRIGHT: (C)2015,JPO&INPIT【課題】耕作地の地下水位を検出するために、低消費電力で電食防止機能、ゴミ・虫による誤動作回避機能をもった地下水位計を提供する。【解決手段】対抗した電極セットを等間隔で並べた水検知部へは測定時のみ電流を流し、最終出力段の出力部はアナログ信号を保持し、中間の信号処理部は測定時以外はスリープ状態で待機する。【選択図】図1
