Abb Technology Ag

Abb Kent Taylor S.p.a.

Eugenio Volonterio

Riccardo Borelli

Rossano Marchesi

Gabriele Crotti

A pressure transmitter and method for measuring pressure exerted by a fluid on the diaphragm of the pressure transmitter. A pressure sensor assembly can include a diaphragm displaceable under pressure exerted by the fluid, and first and second electronic circuits generating first and second oscillating signals, respectively, whose frequencies depend on the displacement of the diaphragm. First and second numerical values which are representative of the oscillating frequencies of the first and second oscillating signals, respectively. A signal indicates pressure exerted by the fluid on the diaphragm based on the first and second calculated numerical values.

Pressure transmitter for measuring the pressure of a process fluid and related method

A pressure transmitter includes a sensor assembly having a hollow body housing a pressure sensor. The pressure transmitter also includes a support body which is made of a first material, and an interface body which is connected to the support body and which is made of a second material different from the first material. A first isolation diaphragm is fixed onto the interface body and is made of the same material of the interface body. The first isolation diaphragm is in fluid communication with the pressure sensor and is configured for interfacing with a process fluid.

Pressure transmitter

A device for measuring the displacement of stems of valves having a spindle coupled to a stem of a valve and provided with two inductive pickups; each inductive pickup is formed by a fixed part and a movable part constituting a variable inductor, which, following a displacement of the stem and a rotation of the spindle coupled thereto, generates an inductance variation of the electric circuit associated thereto; electronic excitation and detection means are adapted to convert the inductance variations into a pair of digital signals whose difference is indicative of the displacement of the stem.

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Appiano Gentile, Italy

Eugenio Volonterio