Cartridge heating elements consist of a ceramic heating element which is mounted in a heat transfer tube and are provided with cable or connection box. They can also be provided with a built-in thermostat and safety fuse.
It is also possible to provide the cartridge heating element with a nipple so that it can be mounted directly into the object to be heated, e.g. water tanks, oil tanks or vessels.
Only when the ceramic heating element is not sealed into the heat transfer tube, it can be removed to be replaced without emptying the vessel or tank.