[Problem] To provide an internal diameter examination device which can with a comparatively simple configuration simply and rapidly examine the status of a space to be examined, an electrical measurement sensor, and a production method for the electrical measurement sensor. [Solution] An internal diameter examination device comprising: an electrical measurement sensor inserted into a space to be examined that is filled with a conductive solution a current supply source and a voltage detection means. The electrical measurement sensor has: an insulating case with at least a surface thereof that comprises an insulating material and is substantially cylindrical two current electrodes formed at a position separated from the axial direction of the cylindrical shape of the surface of the insulating case three or more voltage detection electrodes formed between the two current electrodes on the surface of the insulating case a conductive cable connected to the two current electrodes and the three or more voltage electrodes and which conducts to the outside and a sheath that encloses the cable. The current supply source and the voltage detection means detect the current between the two current electrodes and the two or more voltages generated at the three or more voltage detection electrodes, via the conductive cable.[Problème] Produire un dispositif dexamen de diamètre interne qui peut avec une configuration comparativement simple examiner simplement et rapidement le statut dun espace à examiner, un capteur de mesure électrique, et un procédé de production pour un capteur de mesure électrique. [Solution] La présente invention concerne un dispositif dexamen de diamètre interne comprenant : un capteur de mesure électrique inséré dans un espace à examiner qui est rempli avec une solution conductrice une source dalimentation de courant et des moyens de détection de tension. Le capteur de mesure électrique a : un boîtier isolant dont au moins une surface comprend un matériau i
