English: A dipmeter measuring the self-resonant frequency of one of accompanied probe coils. (Mitamusenkenkyūsho 三田無線研究所株式会社 DELICA DMC-230S2) The indicator is "dipped".
{{Information |Description={{en|1=A dipmeter measuring self-resonant frequency of a coil.}} {{ja|1=ディップメータでコイルの自己共振周波数を測定している様子。}} |Source=A photo taken by the contributor User:しまでん |Au