When the customer demands are such that through-the-wall heaters cannot be installed, portability is required, heaters are to be removed without emptying the tanks, or when there is no access to the liquid medium except from the top, then over the side heaters is the right option. Various shapes and sizes are provided to fit customer dimensions such as,  “ installed-from- the- top” ( L or O shaped) which can easily slide into tanks, vertical loop which are suited for open tank applications or drum heaters for direct immersion in drums. Brackets, risers, legs or junction boxes are used to support the heater if desired. Over the side immersion heaters can be installed in the upper portion of tanks, with the heated portion directly immersed along the side or at the bottom, hence the name. This not only provides ample operating space in the tank, but also allows easy removal and portability. Together with thermowells and control system, this industrial heater, renders practicality and economic feasibility. Mobility is the unique feature of this heater, hence can be used in more than one container, making it a preferred choice for projects. Over the side immersion heaters are the most peculiar heater and stands out among st the immersion heaters.