Abstract: A device for control and monitoring of pressure in a system combines a conventional three pole pressure switch with the following additional features: (1) a lock mechanism with three influencing input factors and a single resulting output contact action, (2) a three pole thermal release device as one of the input factors, and (3) a remote control tripping device as another input factor, all integrated into a single, compact, modular unit. The thermal release device comprises a plurality of bimetals which sense electrical flow passing through the device, and which are mechanically connected to a locking mechanism to shut off current if the electrical flow reaches a predetermined maximum. If any of the three inputs activates the locking mechanism, the device must be reset by an operator.

Abstract: A float switch arrangement includes a holding and sealing component which is made of an electrically conductive material. An electric switch is accommodated in the holding and sealing component. An electric cable is connected to the electric switch and includes an end portion situated at a connection zone. Electric conductors extend from the end portion of the current supply cable through the connection zone to the electric switch and are electrically connected to the electric switch. A gravity actuation arrangement which is operative for actuating the electric switch is also accommodated in the holding and sealing component. A float housing constituted solely by a body of a closed-pore integral foam surrounds the holding and sealing component, the electric switch, the gravity actuation arrangement, and the end portion of the gavity actuation arrangement and the electric conductors at the connection zone and seals the connection zone against penetration of moisture therethrough.