GW OTS Single Spiral Coil Teflon Heaters are spiral-configured incoloy® element sleeved with teflon is a space efficient solution for liquid heating applications where easy removal of the heater for cleaning or inspection is required. This heaters are designed for installing in the top of a tank with the heated portion directly immersed on the side. All GW’s teflon heaters are supplied with “One-Time” thermal fuse preventer as over-heating. Special design liquid tight terminal cover prevents entry of liquids. A polypropylene protection guards are recommended.