Abstract: A protecting casing for a transducer has an outer casing, an inner casing, a circuit board and a connector. The inner casing is detachably mounted in the outer casing and has a mounting hole and a cap detachably mounted on the inner casing to cover the mounting hole in a watertight manner. The circuit board is detachably mounted in the inner casing and has a surface, a circuit formed on the surface and a plug with terminals extends out of the inner casing. The connector is detachably mounted to the outer casing and is electrically connected between the circuit board and an external functional accessory component. Within such an arrangement to facilitate maintenance, assembly of the transducer, and effectively avoid intrusion of water, foreign object and the like.

Abstract: A plumb probe assembly for a level measuring device has a plumb and a connection assembly. The plumb has an inner connecting tube. The connection assembly has two connectors and two clip brackets. The connectors are slidably mounted together while one of the connector firmly connects to the inner connecting tube of the plumb. The clip brackets are movably connected together by at least one resilient device supplying a clipping force and clip around the connectors to hold connectors firmly together. When a force greater than the clipping force, applied to the plumb, the clip brackets separate and the plumb falls into the particulates in the container. The plumb will not cause damage to a particulate discharging device and will disconnect with the connection assembly. A replacement plumb may then be attached to the connection assembly for continued operation.

Abstract: A protecting casing for a transducer has an outer casing, an inner casing, a circuit board and a connector. The inner casing is detachably mounted in the outer casing and has a mounting hole and a cap detachably mounted on the inner casing to cover the mounting hole in a watertight manner. The circuit board is detachably mounted in the inner casing and has a surface, a circuit formed on the surface and a plug with terminals extends out of the inner casing. The connector is detachably mounted to the outer casing and is electrically connected between the circuit board and an external functional accessory component. Within such an arrangement to facilitate maintenance, assembly of the transducer, and effectively avoid intrusion of water, foreign object and the like.

Abstract: A plumb probe assembly for a level measuring device has a plumb and a connection assembly. The plumb has an inner connecting tube. The connection assembly has two connectors and two clip brackets. The connectors are slidably mounted together while one of the connector firmly connects to the inner connecting tube of the plumb. The clip brackets are movably connected together by at least one resilient device supplying a clipping force and clip around the connectors to hold connectors firmly together. When a force greater than the clipping force, applied to the plumb, the clip brackets separate and the plumb falls into the particulates in the container. The plumb will not cause damage to a particulate discharging device and will disconnect with the connection assembly. A replacement plumb may then be attached to the connection assembly for continued operation.