TL Series tape level indicators from Madison Co., Branford, CT, provide liquid level indication where no electrical power is available. Suited for use with 30 or 55 gal. remote and mobile tanks, the devices incorporate a magnetic float and a standard tape measure blade sealed in a liquid-tight tube. The stem and float are in contact with the liquid, leaving the tape clean and easy to read. The retractable steel tape magnetically latches to the level position of the magnetic float; liquid level is determined by sliding the tape out of the stem tube and reading the aligning graduation mark on the tape when the magnetic interlock is felt. Three models are available.