Abstract: Systems/methods for providing Ethernet-APL based end point field devices employ a protective enclosure that allows optical and radio frequency signals to pass through with little or no diffraction or attenuation. The disclosed Ethernet-APL based end point field device is advantageously able to use visual status/configuration indicators as well as radio frequency modules that transmit and receive wireless communication during device operation. To achieve the above, the Ethernet-APL based end point field device herein is provided with a protective enclosure that is made partly or entirely of a transparent, electrically nonconductive material. Such an arrangement allows operators to observe unaided the visual status/configuration indicators of the end point field device, and also allows radio frequency signals to pass through the enclosures with negligible or no attenuation.

Abstract: Digital bridging of field devices to an industrial network using an Ethernet Advanced Physical Layer (Ethernet-APL) bridge device. The APL bridge device includes analog interfaces for current-driven and voltage-driven measurement devices and an Intrinsically Safe (IS) APL connection providing power to the bridge device and the measurement devices. The bridge device enables gateway functionality between field device protocols and industrial network protocols.

Abstract: A vortex flowmeter for measuring a flow rate of a fluid. The meter includes a flowtube, a bluff body, and a vortex sensor. The bluff body, which is positioned in the flowtube, sheds vortices in the fluid when the fluid flows through the flowtube and the vortex sensor detects the vortices and generates a vortex signal representing the detected vortices. A pressure sensor arrangement is configured to detect a differential pressure in the fluid between a first location upstream of at least a portion of the bluff body and a second location downstream of at least a portion of the bluff body and generate a differential pressure signal representing the pressure differential between the two locations. The flowmeter determines the fluid flow rate based on the pressure differential.

Abstract: A vortex flowmeter for measuring a flow rate of a fluid. The meter includes a flowtube, a bluff body, and a vortex sensor. The bluff body, which is positioned in the flowtube, sheds vortices in the fluid when the fluid flows through the flowtube and the vortex sensor detects the vortices and generates a vortex signal representing the detected vortices. A pressure sensor arrangement is configured to detect a differential pressure in the fluid between a first location upstream of at least a portion of the bluff body and a second location downstream of at least a portion of the bluff body and generate a differential pressure signal representing the pressure differential between the two locations. The flowmeter determines the fluid flow rate based on the pressure differential.

Abstract: A vortex flowmeter for measuring a flow rate of a fluid. The meter includes a flowtube, a bluff body, and a vortex sensor. The bluff body, which is positioned in the flowtube, sheds vortices in the fluid when the fluid flows through the flowtube and the vortex sensor detects the vortices and generates a vortex signal representing the detected vortices. A pressure sensor arrangement is configured to detect a differential pressure in the fluid between a first location upstream of at least a portion of the bluff body and a second location downstream of at least a portion of the bluff body and generate a differential pressure signal representing the pressure differential between the two locations. The flowmeter determines the fluid flow rate based on the pressure differential.