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Foxboro Company provides control systems addressing distributed and plant operations [44] as well as measurement and instrument systems. [45] Instruments include Pressure Transmitters, [ 46 ] Coriolis Flow Meters, [ 47 ] Valve Positioners, [ 48 ] Buoyancy Level Transmitters [ 49 ] and Temperature Transmitters.
In the early 1970s Taylor Instrument Company, (now part of ABB) developed the 1010 system, Foxboro the FOX1 system, Fisher Controls the DC 2 system and Bailey Controls the 1055 systems. All of these were DDC applications implemented within minicomputers ( DEC PDP-11 , Varian Data Machines , MODCOMP etc.) and connected to proprietary Input ...
Yokogawa traces its roots back to 1915, [6] when Dr. Tamisuke Yokogawa, a renowned architect, established an electric meter research institute in Shibuya, Tokyo. After pioneering the development and production of electric meters in Japan, this enterprise was incorporated in 1920 as Yokogawa Electric Works Ltd.
Pressure sensors can alternatively be called pressure transducers, pressure transmitters, pressure senders, pressure indicators, piezometers and manometers, among other names. Pressure is an expression of the force required to stop a fluid from expanding, and is usually stated in terms of force per unit area.
1950s Budenberg pressure gauge showing pounds per square inch. The Budenberg Gauge Company was founded in 1918. The original parent company was Schäffer & Budenberg founded in 1850 by Bernhard Schäffer and Christian Friedrich Budenberg in Prussia. The Budenberg Gauge Company is now based in Altrincham, Greater Manchester.
The scheme above presents three pressure transmitters (PT) connected to a logic solver. The solver will decide based on 2-out-of-3 voting whether or not to activate the final element. the 1oo2 solenoid panel decides which valve to be closed. The final elements consist here of two block valves that stop flow to the downstream facilities (right ...