ELECTRICAL CONDUCTIVITY METER

To provide an electrical conductivity meter which suppresses influence due to line capacity of an electrode wire connecting electrodes, so as to measure electrical conductivity with high accuracy.SOLUTION: A sub board 2 is arranged in the vicinity of electrodes T1, T2 attached to a measurement pipe 3. At least one or both of a signal generation circuit 21 for generating a rectangular wave signal and a buffer amplifier 22 for stabilizing detection signals detected from the electrodes T1, T2 so as to output them are loaded on the sub board 2.SELECTED DRAWING: Figure 1 【課題】電極を接続する電極配線の線間容量による影響を抑制し、高い精度で電気伝導率を計測する。【解決手段】測定管３に取り付けられている電極Ｔ１，Ｔ２の近傍位置にサブ基板２を配置し、矩形波信号を生成する信号生成回路２１、および、電極Ｔ１，Ｔ２から検出した検出信号を安定化して出力するバッファアンプ２２のうち、少なくともいずれか一方または両方を、サブ基板２に搭載する。【選択図】 図１