Used for oil boilers, purifiers, fan heaters, lottery heaters, testers, ndustrial machines, food and drink machines, cutting processing machines, and oil containers. It can be easily converted from normally open to normally close by invertin the float.
Note: because the current that the switch can carry is much little( 0.5A ), you must use a relay or contactor when it is connected by a load, relay and contactor are not included here.