The Deltabar FMD72 Electronic Differential Pressure measurement system launched by Endress+Hauser uses two pressure sensor modules connected electronically to a single transmitter and eliminates the need for impulse lines or capillaries and their related issues of icing up, clogging, leaky taps, dry/wet leg inconsistencies, and problems with temperature changes. Ambient temperature changes cause measurement drift in traditional capillary systems, but up to 95% of this drift can be eliminated with the FMD72, the company says. The FMD72 responds up to 10 times faster than traditional impulse and capillary systems, is easier and less expensive to install, and does not require heat tracing. One sensor module measures the hydrostatic (high pressure), the second sensor measures the head pressure (low pressure), and the transmitter calculates the differential pressure. These measured values can be used to calculate the level, volume, or mass of liquids in pressurized tanks.
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