Page 12 - Energize November 2022

NEWS

Position sensor detection for hydraulic

cylinders – a world first

nstrotech has on offer SIKO’s SGH wire-
actuated encoders that measure cylinder
Istroke as well as speed in hydraulic
cylinders with impressive efficiency,
flexibility and robustness.
SGH sensors use a wire draw
mechanism that is integrated directly into
the cylinder to measure the stroke. The
wire of the wire draw mechanism is secured
to the piston head. When the cylinder
extends, the wire wound on a wire drum and hydraulic systems. A suitable sensor is available for all applications. With measuring
is pulled out. The resulting rotation of the lengths of up to 5000 mm, a wide selection of interfaces as well as high flexibility for
drum is detected by the contactless sensor integration of the sensors, the SGH family offers a wide range of possibilities. Redundant
system and converted into a linear position. options and sensors for performance levels of up to PLd are available for safety critical
This means that precise and absolute applications.
position or speed tracking of the cylinder Smart sensors take mobile hydraulics to a new level of safety and efficiency.
is possible at any time. The magnets used “Functional safety” is a term that is being widely discussed. Safety concepts for mobile
to measure the rotation are scanned by machinery has been a topic of interest since the implementation of the new Machinery
the contactless sensor system through the Directive EN 13849. Sensors of the SIKO SGH range help implement intelligent safety
pressure resistant base plate of the SGH concepts for mobile machinery and meet the requirements of the specific safety standards
sensors. The electronic components are for different utility vehicles.
fully encapsulated and located on the non- The safety versions of the SGH25 and SGH50 sensors meet the requirements for use
pressurised side of the system. The entire in applications up to Performance Level d (PLd). Safe and redundant design in compliance
measuring system is therefore incorporated with CAT3 as well as a safe mechanical design means SIKO products are pre-destined for
into the cylinder and optimally protected use in safety-critical applications, also under unusual conditions.
against external environmental influences. In addition, the sensors supply process data which not only serve to satisfy safety
The clear advantage here is, in contrast to requirements, but also offer an added value for the machine. The process data can
measuring systems mounted externally therefore provide insight into an impending seal maintenance interval. Flexible support
on the cylinder, the sensor system cannot tracking in crane and lifting applications extend the working ranges of the machine.
be damaged, negatively affected or even Memory functions in industrial trucks save time and make work safer. All these are
destroyed by environmental conditions. examples of how SGH sensors not only make machinery safer, but also more efficient.
The SIKO SGH sensors were designed
and developed in line with the strict Advantages of the SGH encoder:
specifications of renowned hydraulic • Absolute detection of the cylinder position
cylinder manufacturers. Market demands • Direct integration into the cylinder
ensured that SIKO met their requirements • Measuring range up to 5.000 mm
regarding robustness, durability and • Can be used in safety applications up to PLd
functionality. SIKO worked closely together • No drilling of the piston required
with cylinder manufacturers to define and • Can also be used in telescopic cylinders
satisfy the specifications regarding service • Perfectly protected due to protection category IP69K
life, shock and vibration resistance, EMC • Durable and robust – developed in line with mobile hydraulic requirements
and compatibility with various hydraulic • High EMC
media. All specifications were tested
and confirmed in endurance tests at the Contact Instrotech, Phone 010 595-1831, sales@instrotech.co.za, www.instrotech.co.za
facilities of cylinder manufacturers or in Facebook: bit.ly/3rj1SWY
external accredited laboratories. LinkedIn: bit.ly/3rkfKjL
The SGH technology transforms YouTube: bit.ly/3irItiy
hydraulic and telescopic cylinders as well Product: https://bit.ly/3b3zeFv
as piston accumulators into smart cylinders Hashtags: #Siko #Instrotech #Position #encoders

energize | November 2022 | 12