PRESSURE RELAY Russian patent published in 1998 - IPC

FIELD: measurement technology. SUBSTANCE: pressure relay has body 7, sensing element made as piston 3 positioned with clearance in body hole, flexible membrane 2 which contacts piston and is coupled to body tightly over periphery. Relay is provided with rod 4 arranged coaxially relative to piston. It interacts with spring 5 and contact member, for example with microswitch 8. Flexible membrane 2 has concentric crimp 10. Chamfers are made on piston 3 and in body hole concentrically with respect to each other. Membrane crimp 10 is arranged between the above-indicated chamfers, and membrane 2 is positioned with clearance relative to body 7. EFFECT: higher measurement results. 1 dwg