Patent ID: 7134448

Claim:
An inductive transducer for positional monitoring of a valve body or flap in a fire extinguishing systems, the body or the flap being present in a conduit, the inductive transducer having a housing ( 1 ) made of non-magnetically conductive material and being an elongated hollow member, an inductive sensor ( 5 ) movably arranged in the housing ( 1 ) for providing a signal when the valve body or the flap is moved away from a given position, the inductive sensor located in the housing at a first end which is closed by an end face ( 4 ), the end face being in proximity to the valve body or flap, the sensor being biased in a direction toward the end face by a spring ( 17 ) extending between the sensor and a plug ( 2 ) located at a second end of the housing, the sensor disposed for positional monitoring of the valve body or flap ( 5 ), the sensor having a pull member ( 6 ) extending to the plug ( 2 ), said pull member extending out of the housing through an opening in the plug such that the sensor can be pulled away from the end face using the pull member by overcoming the spring bias thereby simulating a movement of the valve body or flap without disturbing the valve body or flap.