The invention relates to a power-frequency feeble-current
electromagnetic signal sensor of a non-
current transformer type, comprising a bottom liner (11) and at least two sensors (12) mounted on the bottom liner (11). Axial geometric axes of the sensor modules (12) are mutually staggered, and either sensor (12) comprises a
magnetic core (121) and a lacquered wire (122) which is wound outside the
magnetic core (121) and used for inducing a
magnetic field and generating
electromotive force; one end of either lacquered wire (122) of either sensor (12) is connected with the input end of a multistage amplifying circuit module (2), and the other end of one lacquered wire (122) of one sensor (12) and the other end of the other lacquered wire (122) of the other sensor (12) are mutually connected together to form a sensor pair. The power-frequency feeble-current
electromagnetic signal sensor of non-
current transformer type adopts a non-destructive detection technology, does not destruct a wall surface, has low cost, high sensitivity, remarkable strength variance when closing to a live wire, accurate positioning, small error between an indicative position and a practical wire position in a range from -0.5cm to 0.5cm, easiness and simplicity, maneuverability without any professional knowledge, simple structure, firmness, durability, safety, reliability, no
ray release, no ultrasonic wave release, and the like and does not need to
mount an instrument on the wire, thereby being convenient and practical.