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Fischer DE03 combines electronic measurement with a rugged sensor design, resulting in high accuracy, highdifferential and static rating, and ability to handle difficult media.
It is available with local digital readout and electronic limit detection relays, with measuring range of 0 40 mbar to 0 25 bar, with analog linear / square root output.
Differential pressures are applied on outer flexible stainless steel isolating diaphragms, at opposite ends of the sensing capsule. A third diaphragm in between acts as the sensing element.
The cavity of the capsule is filled with hydraulic fluid, and is divided into two separate parts by the central sensing diaphragm. Pressures acting on the outer diaphragms are transferred to the sensing diaphragm by the fluid, through apertures in the intermediate plates. An axial metal rod joined to the sensing diaphragm forms the core of a precision LVDT displacement sensing element.
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 LVDTs coils, and converted by an electronic module to an output signal proportional to the pressure differential.
Inward deflection of each isolating diaphragm is limited by the intermediate plate behind it. This also limits the pressure that can be transferred to the sensing diaphragm, and through it, to the isolating diaphragm on the other side. Thus, all three diaphragms are fully protected against excess differential pressure in either direction, and also against high static pressures.
Key Features:
Vinod Gogoriya (EK Engineering)
Near Vyas Public School, Purani Ginani
Bikaner, Old ginani, Rajasthan
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