General inquiries

Service & Contact

Service hours

Kuebler Inc.

Monday - Friday: 8.00 am to 4.30 pm ET

Shaft copying 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
Go to Product Finder

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.

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.


Easy installation - Ants shaft copying systems - english

Installed in the elevator shaft in just a few steps. Your benefits - cost and time savings over the entire length

Realization of elevator and safety functions EN81-20/21/50 - english

Two examples will show how the Ants shaft copying system in the Safe System variant realizes these elevator and safety functions

Portfolio Ants shaft copying systems - english

Absolute and safe positioning of the elevator car up to 392 m.We present you the benefits of the Ants shaft copying systems. We present you the advantages of the Ants shaft copying systems as well as when and where Base, Safe or Safe System variants are used

Concept Study: electronic overspeed governor - english

This Concept Study presents a further evolutionary step in elevator technology: The mechanical overspeed governor can be replaced by SIL3-certified sensors from Kübler.

Predictive Maintenance with Kübler shaft copying systems and encoders - english

Sensors play an essential role in Predictive Maintenace. We show you what the future could look like and which measurement data Kübler provides



Solutions for Elevator Technology


Shaft copying systems for triggering electromechanical safety gears


Smart Teaching Unit STU02
Concept Study