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Fischer Germany DE13 series Differential Pressure Transmitter Fischer 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. Typical Applications
- Monitoring filter condition
- Flow control
- Monitoring Δ p at valves
- Pump control
Construction and Operation
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. 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. Thus, all three diaphragms are fully protected against excess differential pressure in either direction, and also against high static pressures.
Measuring range 0 - 40 mbar to 0 - 25 bar (see Ordering Code) Nominal pressure 100 bar Max. static operating pressure 100 bar Max. pressure load overpressure safe up to max. static operating pressure Linearity < 1% FS Hysteresis < 0.3% FS Temperature drift < 0.5% / 10 K Perm. ambient temperature -10°C bis +60°C Perm. medium temperature 70°C Protection class IP 65 acc. to DIN EN 60529 Output signal : (0) 4- 20 mA / 0- 10V
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