PNEUMATIC TRANSDUCER FOR UNDERGROUND BURIAL

摘要

A transducer for converting fluid pressure into pneumatic pressure for relay to a remote readout station comprises a valve body having a chamber spanned by a diaphragm which divides the chamber into a pore-fluid pressure cavity and a transducer cavity and carries a centrally resilient hemisphere within the transducer cavity in axial alignment with a duct which constitutes a vent from said transducer cavity.