Suitable for continuous level indication of horizontal tank and mainly underground tank containing very hazardous and corrosive liquid in nature. It is covered in two units, one units fixed on mounting flange with guided cage assembly & float is connected to the S.S. pipe having imported magnet assembly.Second unit fixed on mounting flange. The magnet assembly moves up & down in the main S.S. pipe chamber. The float magnet is operated by magnetically coupled to the follower red magnet outside chamber which is mounted on front side of the main S.S. pipe.