Differential Pressure Transmitter PRD 33-X


Catalog excerpts

Differential Pressure Transmitter PRD 33-X - 1

Differential Pressure Transmitters Series PRD-33 Xwith high overload resistance and line pressure output The Series PRD-33 X was developed for applications that require a high accuracy differential pressure measurement together with high overload resistance in differential pressure ranges as low as 350 mbar. The Series PRD-33 X is the result of ongoing development of the KELLER PD-33 X differential pressure transmitter. Thanks to a second integrated pressure sensor, the line, or common mode, pressure can now be measured along with the differential pressure, resulting in several notable features not found in traditional differential pressure transmitters. For example, compensation for line pressure effect is now accomplished during factory calibration. Moreover, both differential and line (absolute) pressure may be read by the user. In addition, the PRD-33 X features high differential overload resistance; e.g., ± 35 bar with a differential measuring range of only 350 mbar (100:1). The internal differential pressure sensor element is isolated from the High (+) side media by a compliant stainless steel diaphragm, while the Low (-) side media impinges directly on the back side of the silicon measuring cell. Also isolated from the High (+) side media is the line (absolute) pressure sensor. The floating sensor assembly guarantees maximum decoupling from external mechanical forces. Another notable feature of the Series PRD-33 X is the robust digital RS485 bi-directional communication interface. Information such as serial number, pressure range, filter settings and process values for both differential and line (absolute) pressures and their temperatures are easily obtained. This combination of features enables certain measurements not possible with traditional differential pressure transmitters. For example, filling levels in liquefied gas storage tanks, including oxygen, nitrogen, carbon dioxide and argon can now be measured safely, accurately and at reasonable cost. Features - High-accuracy differential pressure measurement with compensated line pressure dependency - Pressure- and temperature-compensated - Independent line (absolute) pressure output - High overload resistance - RS485 communication interface - Configurable via RS485 interface - Compact structural design Applications - Level measurement of technical gases in liquefied gas tanks - Differential pressure measurement in case of high unilateral overload resistance KELLER Ges. fur Druckmesstechnik mbH D-79798 Jestetten ^ +49 7745 9214 0 El eurocenter@keller-druck.com Version 10/2017 Anderungen vorbehalten Unternehmen zertifiziert nach ISO 9001 Ini www.keller-druck.com

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Differential Pressure Transmitter PRD 33-X - 2

□ KELLER Differential pressure measurement (P1): Pressure Range* Accuracy** Resolution Total Error Band (-30...+ 60 °C)*** Common mode / line pressure range Proof pressure Burst pressure 0...350 mbar ± 0,1 %FS 0,01 %FS ± 1 %FS 0.40 bar abs ± 35 bar ± 80 bar *Other pressure ranges on request ** Includes Linearity (BFSL) + Repeatability + Hysteresis *** Includes Accuracy, Temperature error, Static line dependence Signal processing This series features microcontroller-based electronic evaluation to ensure maximum accuracy. Each transmitter is gauged across the entire pressure and temperature...

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