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At SPS IPC Drives on 25–27 November 2014, Kistler Instruments will showcase its KiTorq 4551A and sensor 4503B for measuring highly dynamic torques at test stands. Both systems deliver reliable measurement results with an accuracy of 0.05 per cent per cent.

The KiTorq 4551A is the latest version of Kistler’s KiTorq system, which can be used to determine torques, rotational speeds or angles with a resolution of up to 8,192 pulses per revolution, and allows the user to adjust the pulse rate. The system offers rotational speeds or angular resolutions that can be adjusted to any requirement.

The measuring flange system consists of a single measurement body, the KiTorq rotor and an evaluation unit, the KiTorq stator. As far as the selection of suitable components for each test stand is concerned, the system offers manufacturers of electric and combustion engines, drives, pumps and compactors great flexibility because the guide-less stator means that different measurement bodies can be used without having to completely rebuild the test facility.

At the same time, the newly developed speed measurement system within KiTorq 4551A is fully integrated and practically invisible. The distances between the rotational speed probe and the magnetic flywheel do not require readjustment, and its magnetic function makes the probe maintenance free and resistant against any kind of contamination. This results in cost savings during commissioning and maintenance of the system.

Another highlight is the absolute zero value called Z-Impuls offered by the new KiTorq system, by means of which absolute angle positions can be determined. Torques can be measured across a range from 50–50,000Nm in different installation sizes. Parameterisation takes place by means of the SensorTool software via a USB interface or directly through a PLC via the Fieldbus or Ethernet ports. Therefore, commissioning the KiTorq 4551A is easy, according to Kistler.

The 4503B torque sensor is the successor of the Type 4503A sensor with a shaft connection. It offers a number of enhanced functions and therefore complies with the latest market requirements. The previous optical speed and angle measurement device was replaced with a magnetic one similar to the new KiTorq solution. This offers the advantage that the sensor is now safe and robust enough for use in contaminated industrial environments — for example, oil and mist — which saves valuable maintenance time.

In addition, the electronics of the torque sensor have been improved. For highly dynamic measurements, the 4503B also has a cut-off frequency of 10kHz. This can be customised by the user by means of an integrated digital low-pass filter, and the second measurement range can be flexibly scaled up to a spread of 1:10. In addition, the Type 4503B is characterised by wide measurement ranges of 0.2–5,000Nm as well as combined rotational speed/angle measurement and a high-speed version of up to 50,000 1/min.

Kistler will be found in booth 526in hall 4A.

Kistler Instruments

Established in Winterthur (Switzerland) in 1957, the Kistler Group now has a worldwide presence with 23 group companies and 30 distributors ensuring prompt, local application support and short delivery times. With a staff of more than 1,000, the Kistler Group is one of the world’s leading providers of dynamic measuring instrumentation.

Kistler’s core competence is the development, production and use of sensors for measuring pressure, force and acceleration.  Kistler’s know-how and electronic systems can be used to prepare measuring signals for use in analyzing physical processes, controlling and optimizing industrial processes, improving product quality in manufacturing and improving performance in sports and rehabilitation.

Kistler offers a comprehensive range of sensors and systems for engine development, automotive engineering, plastics and metal processing, installation technology and biomechanics.

Heavy investment in research and development, 15% of staff worldwide are engaged in research and development, has generated a number of innovations using piezoelectric, piezoresistive and capacitive techniques to provide solutions to numerous force, pressure and acceleration measuring problems. These innovations include the world’s first commercial quartz sensor, two-wire constant current technology to integrate sensors with microelectronic circuitry, high-temperature pressure sensors for use up to 400 Deg C and three-component force measuring sensors.

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