Abstract: A pressure measuring device wherein a housing (1) includes a pressure sensor (2) in a pressure chamber (4) and an electronic circuit (14) in a non-pressurized chamber (6). Borings (7) extend between pressure chamber (4) and non-pressurized chamber (6) and accommodate contacts that electrically connect pressure sensor (2) and electronic circuit (14). A pressure membrane (3) cooperates with housing (1) to further define pressure chamber (4) and isolate the device from the fluid system. Pressure chamber (4) is filled with a medium that transmits the system pressure and provides an output signal to electronic circuit (14).

Abstract: A pressure measuring device wherein a housing (1) includes a pressure sensor (2) in a pressure chamber (4) and an electronic circuit (14) in a non-pressurized chamber (6). Borings (7) extend between pressure chamber (4) and non-pressurized chamber (6) and accommodate contacts that electrically connect pressure sensor (2) and electronic circuit (14). A pressure membrane (3) cooperates with housing (1) to further define pressure chamber (4) and isolate the device from the fluid system. Pressure chamber (4) is filled with a medium that transmits the system pressure to pressure sensor (2). Pressure sensor (2) measures the pressure and provides an output signal to electronic circuit (14).

Abstract: The subject of the invention is a waveguide-type, multi-stage, receiver protector. It combines the use of all-chlorine gas discharge stages and a radioactive primer discharge stage having a semi-inert gas medium in a way to retain the protection benefits of the radioactive primer device, while providing the fast recovery time of the chlorine stages. The apparatus includes an r.f. limiting diode section which aids in attaining the combined benefits of the other two types of stages.