The differential pressure transmitter DE13 for differential, negative and positive pressure measurement using a diaphragm system with liquid filling. The instrument transmits a standard electrical signal. The pressures to be compared each act on an outer flexible stainless steel isolating diaphragm. They are transferred to the sensing diaphragm by the pressure transfer fluid. When pressures are equal on both sides of the sensing diaphragm, it is at zero position. Pressure difference across the sensing diaphragm causes it to deflect away from the higher pressure side, resulting in linear displacement of the LVDT core. This displacement is sensed by the LVDT’s coils, and converted by an electronic module to an output signal proportional to the differential pressure. Thus, all three diaphragms are fully protected against excess differential pressure in either direction, and also against high static pressures.
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