GW OTS Single Metal Heaters designed for installing in the top of a tank with the heated portion directly immersed along the side. This provides easy removal of the heater and ample working space inside the tank. The heaters are available with heating elements made of Stainless Steel 304, Stainless Steel 306 & Titanium. All GW’s metal heaters are supplied with “One-Time” thermal fuse preventer as over-heating. Special design liquid tight terminal cover prevents entry of liquids.