Beginner's guide to Differential Pressure TransmittersThese transmitters find application in the gas, water, and process industries that require accurate measurements over a wide range of environmental conditions. The main assemblies of the DP transmitter are the electronics housing, sensor module and process flanges as noted in Figure. One fluid system corresponds to the HI pressure input, and the other to the LO pressure input. The movement of these diaphragms causes similar pressure changes in each of the sealed fluid systems that are detected by the sensor. The output of the sensor circuit is wired to a high-gain, linear amplifier that converts the millivolt signals to a mA current output. Figure shows the transmitter output wired to a typical external loop circuit. Transmitters also include internal coarse zero and coarse span switches for more extensive range conversion.
A pressure sensor is a device for pressure measurement of gases or liquids. 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. A pressure sensor usually acts as a transducer ; it generates a signal as a function of the pressure imposed. For the purposes of this article, such a signal is electrical. Pressure sensors are used for control and monitoring in thousands of everyday applications. Pressure sensors can alternatively be called pressure transducers , pressure transmitters , pressure senders , pressure indicators , piezometers and manometers , among other names.
The working principle of the differential pressure transmitters
This article is a straightforward and informal guide with illustrations aimed at helping beginners to understand Differential Pressure Transmitters principles. This means that we can increase the pressure by either increasing the force or by reducing the area. If the same 1lb was applying a force to only half the area, we would actually say the pressure was equal to 2 Psi. In our day to day experience we may pump our car tyres to 26 Psi. We also experience pressure in the form of weather or atmospheric pressure. This could be considered the force being appleid by the atmosphere on our heads. As the atmospheric pressure changes, so does the weather.
Differential Pressure Transmitters For differential pressure measurement pressure ranges 0 … 1 mbar up to 0 … 70 bar. Differential pressure DP transmitter , also called differential pressure transducer. Differential pressure transmitters measure the difference between two pressures. Differential Pressure Transmitter converts pressure measurements, into a proportional mA or a 1 — 5 Vdc output signal,. These transmitters find application in the gas , water ,.