Inner diameter inspection device capable of a relatively simple configuration the situation of [challenges] space to be inspected, to check easily and promptly, and to provide a process for the production of electrical measurement sensor and electrical measurement sensor. Includes a voltage detecting means and the current supply source and the electrical measuring sensor which is inserted into the test object space filled with a solution of [SOLUTION conductive, the electrical measuring sensor, to substantially the surface and made of an insulating material at least and two current electrodes, which are formed an insulating housing has a cylindrical shape, at a distance in the axial direction of the cylindrical surface of the insulating housing between the two current electrodes on the surface of the insulating casing anda sheath encapsulating the conductive cables led to the outside is connected to the voltage detection electrodes 3 or the voltage detection electrodes 3 or more is formed, the current electrodes of the two, the current supply voltage detection means and the source is inside diameter inspection apparatus for detecting a voltage of 2 or more occurs in the voltage detection electrode of the three or more current and the current electrodes between the two via the conducting cable. [Selection] Figure Figure 1【課題】検査対象空間の状況を比較的簡単な構成で、容易・迅速に検査することのできる内径検査装置、電気計測センサおよび電気計測センサの製造方法を提供する。【解決手段】導電性の溶液で満たされた検査対象空間に挿通される電気計測センサと電流供給源と電圧検出手段を備え、電気計測センサには、少なくとも表面が絶縁材料からなりかつ実質的に円筒形状をした絶縁筐体と、この絶縁筐体の表面の円筒形状の軸方向に離れた位置に形成されている2つの電流電極と、この絶縁筐体の表面の2つの電流電極の間に形成されている3以上の電圧検出電極と、この2つの電流電極とこの3以上の電圧検出電極とに接続され外部に導出する導電ケーブルとそれを封入する鞘と、を有し、上記電流供給源と電圧検出手段は、上記導電ケーブルを介して上記2つの電流電極間の電流と上記3以上の電圧検出電極に生じている2以上の電圧を検出する内径検査装置。【選択図】図1
