This paper presents an explorative circuit system functioning as a highly stabilized and sensitive reactance meter with a wide range of application in various fields of scientific research and industrial operation. With a measuring range of 10−3to 10+6pf, it has a sensitivity of 5–10 &mgr;a/0.001 pf when measured through an ammeter with a full scale of 100 &mgr;a, and a stability of less than 1&mgr;a in terms of zero drift during several hours. Some experimental data are given for the appreciation of its characteristics.