The Keller 20p Fully Compensated Mini Pressure Transmitter is a "Pisello" type, utilizing a circuit that is no larger than a cent coin, and is available in ranges between 10 and 600 bar .

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A circuit no larger than a cent coin compensates the Pisello against fluctuations in operating temperature. The circuit’s EEPROM has stored values of ‘zero point’ and ‘amplification gain’ for each 1.5 °K wide part of the transmitter’s temperature range, previously determined by mathematical interpolation during the calibration process. During operation, the values corresponding to the operating temperature are switched-in. In this way, temperature fluctuations of up to 100 °K can be compensated for. The Pisello achieves a typical measurement accuracy of ±0.5% FS, including non-linearity and hysteresis, over the compensated temperature range.

The output signal from the miniature pressure transmitter (which reacts extremely quickly thanks to its signal bandwidth of 2 kHz) varies between 0.5 and 4.5V. The Pisello operates with voltage supplies from 8 to 28V, has a diameter of only 13 mm and a mass of 11 grams, making the Pisello ideal for mobile application use or use where space is limited.

The housing with its threaded pressure connection (M8, M6 or 10-32 UNF) is entirely welded and meets the requirements for protection class IP67.

Bestech Australia | Measurement Equipment & Technical Training Systems

Bestech Australia was founded in 2002 in Melbourne and is now one of the fastest growing companies in Australia and New Zealand, distributing and manufacturing sensors, transducers, signal conditioners and test systems for measurement of physical parameters like Leak, Displacement, Tilt, Pressure, Temperature, Strain, Force, Torque, Vibration, Viscosity, Level, Flow, and Material Properties. Bestech Australia also carries a full range of technical teaching equipment and programmes for electrical/electronics, civil, mechanical and chemical engineering as well as automotive and avionics training. Bestech Australia supplies state of the art instruments from world leading manufacturers, and provides quality customer service. Bestech delivers a wide range of products for university and research laboratories as well as various applications in manufacturing, military, mining, steel, rail, construction, automotive, chemical, pharmaceutical, food and water industries. In addition, Bestech Australia has well trained engineers to provide advice and guidance on specific applications and products selection. We offer full support including repair, maintenance and calibration.

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