Monitoring Sensor with Ground Isolation and Current Output

In large engines, there are often distances of up to 30 meters between the location of the combustion pressure sensor and the evaluation electronics. If both the sensor and the evaluation electronics are connected to ground, high ground loop currents can flow between these two grounding points. As a result, the analog output signal of the sensor will be super-imposed with strong interference signals.

To solve this problem, Kistler is now offering a ground-insulated monitoring sensor: the inner part of the sensor Type 6353A24 is electrically insulated from the sensor case. There is no electrical contact between the charge amplifier case and the engine either. This ground insu-lated construction prevents ground loops between the sensor and the electronic units con-nected to it.

An additional adaptation to the industrial environment is a current output allowing the cylinder pressure signal to be transmitted over large distances free of interference.

Kistler Group

Kistler’s core competence is the development, production and use of sensors for measuring pressure, force, torque 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.

A worldwide sales presence in the form of 23 group companies and 30 distributors ensures customer proximity, application support on an individual level and short lead times.

With a staff of 820, the Kistler Group is one of the world’s leading providers of dynamic measuring instrumentation. The Kistler Group achieved turnover of 195 million Swiss Francs in the 2007 financial year.