Patent ID: 8776596

Claim:
An apparatus for monitoring the level of a floating storage tank roof having a cover, said apparatus comprising; a. a flexible rod having a first end for contacting a bottom surface of said cover and a second end disposed within; b. a base comprising a housing and a slot within said housing for accepting said second end; c. a resilient compressible member disposed within said slot, said resilient compressible member having a top end and a bottom end; d. wherein the second end of said flexible rod is in contact with said resilient compressible member top end; e. wherein the flexible rod second end is capable of sliding movement within the slot; f. position sensing means disposed and regularly spaced within the slot for detecting the position of the rod second end during said sliding movement; g. signal generation means connected to said position sensing means for generating a rod second end position signal; h. signal transmission means connected to said signal generation means for transmitting said rod second end position signal to a remote monitoring station; i. means for converting the rod second end position signal to a human detectable annunciation; and, j. signal conversion means for converting the second end position signal to a corresponding level of the storage tank roof.