[Pressure Level Measurement Pressure Transmitter EDN.363, Accuracy 0.25%]

 

Water level measurement by pressure method The pressure transistor is measured by the pressure delivered to the pressure sensor based on the specific gravity 1 of pure water. Oil or other fluids lighter than the specific gravity 1 of water should be applied with an appropriate specific gravity value.

 

In addition, it is essential to apply a pressure sensor that compensates for fluctuations in atmospheric pressure, since errors in pressure measurement may occur due to fluctuations in atmospheric pressure. In addition, the water level/level measurement in a storage tank of fluid such as water or oil should be an open tank exposed to atmospheric pressure, and in the case of a closed tank, it is recommended to use a pressure differential pressure transmitter due to changes in the density of the internal air.

 

The cable of the water level measurement pressure transistor should be a functional tube that can compensate for atmospheric pressure and atmospheric pressure fluctuations in the pressure sensor, and since no additional extension work can be performed on the cable applied and supplied at the time of initial production, the total cable length to the position where the measured value is finally delivered should be counted when setting the product order specification. It should be secured.

 

EDN.365 series is made of stainless steel and can be applied to water and oil that do not cause chemical corrosion. The EDN.365 series, such as general water & oil, supports 0.25% F.S. for measuring the level of fluid.

 

[Technical specifications]

Pressure ranges	0…20 mbar to 0…20 bar
Accuracy	± 0.25% F.S
Electrical connection	대기압보상 케이블 on request
Signal output	4...20 mA, 2 wire-system 0…10V, 3 wire-system
Operating temperature	-20…+80 ℃ / standard -40…+125℃ / option

■ Definition of Hydrostatic Pressure 

P = ρ g h+ Po

 

            Ρ : the total pressure on an object submerged in a fluid

            g : the acceleration due to gravity

            Po : the pressure at the fluid’s surface

            (For example, 100 cm deep = 100 mbar)