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Kuebler Inc.

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Shaft copy systems

Safe, precise, robust
  • Travel height up to 392 m
  • Safety: SIL3-certified
  • Dynamic: Travel speed up to 5 m/s
  • Precise: Resolution up to 1 mm
  • Direct: Absolute positioning
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Absolute positioning of the elevator car for travel heights up to 392 m.

The contactless absolute measuring system for shaft copying – also called shaft information or positioning system – has an extremely compact, very robust design. In addition to the sensor, which detects the position of the elevator car 100% slip-free, this also includes the right evaluation unit, the so-called Position Supervisor Unit, or PSU for short. With the Safe System, consisting of SIL3-certified sensor and matching evaluation unit, elevator and safety functions can be realized according to EN 81-20/21/50 and ASME A17.
Product details
Ants Base 2nd Generation
  • Absolute position acquisition
  • 100 % slip-free
  • Extremely robust and compact
  • Easy installation
  • Contactless measuring principle
  • Various interfaces
Product details
Ants Safe
  • SIL3-certified
  • Absolute position detection
  • 100% slip-free
  • Extremely robust and compact
  • The simplest installation
  • Contactless measuring principle
Product details
Safe system

SIL3-certified sensors with suitable evaluation unit or position supervisor unit for implementing elevator and safety functions.

Ants Base & Ants Safe 2nd Generation

  • Ready for high-rise – speed up to 12 m/s
  • Robust design – improved IP rating
  • Improved flexibility – different mounting options
  • Implemented diagnostics – status LED
  • Easy installation – extremely compact

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Technology in detail

Saves time and costs

One of Kübler's unique selling points is its ease of mounting. Using carabiners, the stainless steel band can easily be mounted to the respective mounting set via "plug & play." In the shaft pit, the belt is pretensioned by a spring. The essential installation instructions are available both on the strip packaging and directly on the sensor. Time-consuming scrolling through user manuals or searching of PDF files is no longer.

Suitable for the tightest installation spaces

The extremely compact design not only saves space but also costs. Especially for elevators with reduced shaft head, shaft copying from Kübler offers benefits. Sensors can be mounted on, next to or under the cabin.

Reliable and durable

The robust stainless steel band with its rounded edges is mounted directly to the guide rails using a mounting set. It can neither be influenced by temperature fluctuations nor by magnetic influences during mounting, such as the use of magnetized screwdrivers. The code is punched into the stainless steel strip. As a result, Kübler dispenses with additional gluing processes and thus ensures maximum robustness of the band in the application.

Precise positioning

Loss of absolute position or correction of position by reference switches (magnetic vanes) is a thing of the past. With Kübler's shaft copying, the position of the elevator car can be determined 100% slip-free. The sensor is mounted directly on the elevator car and can directly determine the absolute position without additional reference markers in the shaft. Slippage of the cable at the drive has no effect on the measuring result. The sensor system is an absolute value system which can record a unique absolute position value at any point of the code band.

Reduction of overall costs

With the SIL3 certified Position Supervisor Unit (PSU), evaluation unit, or Safe Box, elevator and safety functions can be realized in accordance with EN81-20\/21\/50. These include emergency limit switches, UCM (Unintended Car Movement) / inspection limit switches, overspeed inspection, or door bypass. Kübler's safe system allows numerous existing components in the elevator shaft to be eliminated, such as limit switches, magnetic vanes, reference switches, or door zone magnets. In addition to procurement costs, this saves installation and maintenance time.


Electronic Overspeed Governor
(Concept Study)


Elevator Technology