LiView – Position transducer for hydraulic cylinders

The intelligent position transducer LiView is suitable for all hydraulic cylinders, independent of cylinder length or diameter. The system determines the exact piston position and speed through high-resolution absolute measurement. For safety-relevant applications, LiView is certified according to EN ISO 13849 PL d and EN IEC 61508 SIL2. The system convinces by easy mechanical integration, without weakening of the piston rod. Additionally, the full effective stroke of the cylinder is available in the application. During development, we placed great importance on a high level of robustness. Thus, LiView is ideal for the automation of mobile machinery.
Max. measurement range 10 m
Measured quantities Absolute piston position / Piston speed
Certification PL d (EN ISO 13849) / SIL2 (EN IEC 61508)
IP rating IP67 / IP68 / IP6K9K

Features

Easy mechanical integration

Easy mechanical integration

The LiView evaluation electronics can be installed either on the cylinder or directly on the machine. Only two small probe heads need a connection to the piston rod bearing. This allows fast and simple integration of the system.

No moving parts in oil

No moving parts in oil

LiView utilises the piston itself as sensing element and measures using fixed probe heads. No moving parts in oil (e.g. magnet), which may cause an oil contamination including a machine breakdown, are required.

Extremely robust

Extremely robust

Severe heat up to 85°C, fierce vibrations or aggressive salt water: LiView defies adverse environmental conditions. This leads to long-term high system availability.

One solution for all cylinders

One solution for all cylinders

The position transducer LiView is generally suitable for all cylinder lengths and piston diameters – a state-of-the-art sensor system with smart technology for all of your cylinders.

Maintenance friendly

Maintenance friendly

Easy access: The external processing electronics as well as the probes are easily accessible. This facilitates fast and simple maintenance without draining oil or disassembling of the cylinder.

Durable

Durable

The LiView system has low-wear and was developed for intensive long-term usage. The probe heads swim on an oil film and are therefore almost wear-free.

Full effective stroke

Full effective stroke

When using LiView, the space in the cylinder can be entirely used for the stroke, as the probe heads are integrated in the piston rod bearing. Therefore, in general, the entire cylinder length can be used with the position transducer installed.

Accurate position and speed

Accurate position and speed

The high-resolution position transducer for cylinders measures the accurate position of the piston with lowest nonlinearity. In addition, the position transducer is able to determine the speed of the piston.

Ideal for automation

Ideal for automation

By combining easy integration, easy maintainability and precise measuring performance, LiView creates ideal prerequisites for the automation of mobile machinery.

Fast measuring cycle for highly dynamic cylinders

Fast measuring cycle for highly dynamic cylinders

In addition to the precision of the measurements, a fast measuring cycle is essential. In particular for highly dynamic cylinders, fast measurement data acquisitions are required for efficient and safe (semi)automation.

Full stability of the piston rod

Full stability of the piston rod

By integrating LiView, there is no need for drilling the piston rod. This reduces costs and maintains the full stability of the cylinder.

Functional safety

Functional safety

SIL2 and PL d: The usage of the TÜV-certified LiView supports you in the construction and certification of mobile machinery, allowing the implementation of safety-relevant functions, like safe load indicators.

Simple integration into the machine control system

Simple integration into the machine control system

LiView supports the standardised protocols CANopen and CANopen Safety. Thus, LiView can be easily integrated in the control system.

Customised functionality

Customised functionality

Configure the LiView functionality according to your application's needs, enabling you get the most out of our position transducer.

Dynamic cylinder movements

Dynamic cylinder movements

LiView is an intelligent position transducer which calculates piston speed in real time. This provides short latency periods for the control system, enabling high-performance position control of cylinders. This is especially advantageous if you dynamically approach predefined workspace boundaries.

Technical data

Max. measurement range * 10 m
Measured quantities Absolute piston position / Piston speed
Resolution 100 µm
Typical repeatability 250 µm
Max. pressure 420 bar
Certification PL d (EN ISO 13849) / SIL2 (EN IEC 61508)
CAN interfaces 1 (CANopen / CANopen Safety)
Electrical connections M12
Dimensions (L/W/H) 158.6 / 123.4 / 42.5 mm
IP rating IP67 / IP68 / IP6K9K
other sizes available on request

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