A gas sensor element includes a laminate formed of a detecting element section and a heater section, and a porous protection layer covering a forward end portion of the laminate. The main body portion defines an upper deck surface upon which the user can stand or otherwise be supported. The support arrangement includes a second connection means to connect to a second part of the tower. Therefore, a multi-phase generator is provided which has a small power consumption. One form of the present invention includes a system for the precision pouring of molten metal within a casting mold. The second actuator assembly is in selective fluid communication with a second pump assembly.