NON-CONTACT DETECTING DEVICE

PROBLEM TO BE SOLVED: To provide a non-contact detecting device which can, first, detect resistance value change based on detection target information easily, readily and reliably, and second, detect, for example, liquid level position information in a tank in a similar way. SOLUTION: In the non-contact detecting device B, based on mutual inductive action of electromagnetic induction, while a primary coil 7 and a secondary coil 9 are proximally positioned in a non-contacting manner, power can be supplied from a primary side 1 to a secondary side 2, and load resistance value change of the secondary side 2 based on information of the detection target O and required information of the detection target O are detected by utilizing voltage change at the primary side 1. When the non-contact detecting device B is applied to the tank, the primary side 1 and the secondary side 2 are fixed inside and outside a tank side wall with a magnet. Along with this fixing, a float switch is provided at a secondary side circuit 6, and on/off of the float switch and the liquid level information in the tank are detected by utilizing voltage change of a primary side circuit. COPYRIGHT: (C)2010,JPO&INPIT