Rosemount Inc.

Micromotion Gmbh

Samuel Ethan Messenger

Jared James Dreier

Michael Jeffrey Mikolichek

Michael John Mayer

Kirk Allan Hunter

Erik D Anderson

Scot Ronald Foss

Steven Bruce Rogers

Bruce David Rovner

Michael W Barto

Jordan Dennis Lucht

Chad T Weigelt

Arthur S Gosling

John C Beyl

Jeffery A Cota

Jared J Dreier

Bruce D Rovner

Michael Jeffrey Mikolicheck

An electromagnetic flowmeter assembly is provided. The assembly includes a magnetic flowmeter configured to couple to a process pipe at a coupling point and measure a flowrate of a flow of process fluid. The assembly includes a conductive polymer reference connection configured to contact the process fluid and provide an electrical connection to magnetic flowmeter electronics.

Conductive polymer reference connection for magnetic flowmeter

A magnetic flowmeter includes circuitry for sensing coil current, coil voltage, or coil resistance. Based on the sensed coil current, voltage, or resistance, a digital processor determines whether a power limit or a coil current limit is exceeded and either halts operation until it receives a new configuration with a new coil current setpoint, or determines a new coil current setpoint itself and adjusts the magnetic flowmeter to that new coil current setpoint.

Magnetic flowmeter with power limit and over-current detection

An optical isolator is provided. The optical isolator includes a printed circuit board having a first surface and a second surface opposite the first surface. The printed circuit board has a recess extending only partially through the board. The first photoelement has an active surface and is mounted relative to the first surface of the printed circuit board. A second photoelement has an active surface and is mounted relative to the second surface. The second photoelement is configured to interact with the first photoelement. At least one of the first and second photoelements has its active surface disposed at least partially in the recess. A portion of the printed circuit board is interposed between the first and second photoelements.

Optical isolator mounted in printed circuit board recess

A flowtube assembly for a magnetic flowmeter is provided. The flowtube assembly includes a flowtube configured to receive a flow of process fluid. A magnetic core is mounted relative to the flowtube and includes a plurality of layers of a magnetically permeable material. Each layer is substantially planar and is electrically insulated from others of the plurality of layers. A coil is disposed to generate a magnetic field having field lines that are substantially orthogonal to the plane of each layer.

Magnetic core configuration for magnetic flowmeters having a plurality of layers of magnetically permeable material

A terminal feedthrough is provided. The terminal feedthrough includes a terminal pin insert having a pair of ends. A polymeric body having an externally threaded region is disposed about the terminal pin insert to form an interface with the terminal pin insert. At least one of threads of the externally threaded region and a cylindrical pin interface is configured to provide a flame-quenching pathway.

Terminal feedthrough

A flowtube assembly for a magnetic flowmeter is provided. The flowtube assembly includes a flowtube configured to receive a flow of process fluid therethrough. A magnetic core is mounted relative to the flowtube and includes a stem extending from the flowtube to a pair of arms. Each of the arms extends away from the stem. A spool having a plurality of magnetic windings is disposed about the stem and spaces the plurality of windings from the flowtube.

Magnetic core configuration for magnetic flowmeters

Growing community of inventors

Chaska, MN, United States of America

Samuel Ethan Messenger