Sensors & Transducers


Wire-actuated encoder with four metre measuring length

March 2016 Sensors & Transducers

Instrotech has announced the local launch of Siko’s new wire-actuated encoder SG42, with a robust design and redundant sensor system for measuring 4000 mm length.

Functional safety is a term on everyone’s lips, not only in Europe since the introduction of their new Machinery Directive 2006/42/EC, but also globally, where there is a new focus on increased safety through special requirements in the field of mobile machinery, all-terrain cranes, hydraulic lifts, mobile elevating work platforms, and vehicle-mounted cranes. In other areas, such as in the construction and agricultural equipment markets, the requirement for intelligent safety systems too, has increased.

In response, Siko developed these new wire cable sensors which, in combination with safe control systems, allow the overall system to be certified in pursuant to SIL2 PLd. With MTBF values of >100 years, these sensors are ideal for use in certified complete systems.

Redundant length measuring systems for optimal safety

The Siko wire-actuated encoders SG32, SG42 and SG62 provide this enhanced security by a specialised and fully redundant sensor system, which is used to determine the exact position. Two completely separate sensor systems detect the position and display it as separate analog signals. With measuring lengths between 3 and 6 m, these sensors are ideally suited for accurate position determination of outriggers on cranes and working platforms, as well as for determining the position of booms.

The durable structure of the sensors is especially impressive, for instance the spring assembly is protected against the ingress of dirt and water, so that it will always work, even at temperatures below freezing.



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