A differential pressure transmitter’s main purpose is to measure two opposing pressures in a pipe or vessel, but they can also be used to determine liquid level. Differential pressure transmitters are made up of a few different components: a primary element, a secondary element, and an electronic module. The primary and secondary elements in the transmitter are also sometimes referred to as the high side and low side. There are several different types of primary elements that can be used in a differential pressure transmitter, including orifice plates, venturi tubes, pitot tubes, flow nozzles, laminar flow elements, wedge elements. These primary elements are used to produce a change in pressure as the flow in the pipe or vessel increases. The secondary element is then used to measure the change in pressure caused by the primary element. Finally, sensors in the differential pressure transmitter will send an electrical signal to the electronic module where it will be converted into a current output that can be read by the control system. This electrical output is proportional to the measured change in pressure, or “Delta-P”.
Differential Pressure Transmitter Applications
Differential pressure transmitters are used to monitor reactions and processes in a wide variety of industries. These transmitters allow companies to perform level sensing in condensers, acquire data about process performance, and monitor changes in a system due to contaminants and other variables. Differential pressure transmitters can be used in various applications because they are inherently resistant to oxidation and gas adsorption, and have a high resistance to corrosive media and atmospheric moisture. The electronic module of a differential pressure transmitter can also be calibrated to be used in wet & dry applications, making them useful in systems where contents evaporate or condensate.
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