Wittur ESG is a breakthrough safety system solution for new elevator installations.

Its reliable braking element is combined with the latest SIL3 position and speed detection and electromechanical gear activation: overspeed governor, tension device and rope loop are no longer needed, and more shaft space can be used for the car.

Advanced self-monitoring routines and automatic setup with shaft dimensions determination ensure a fast and easy installation and a reliable fail-safe system. Safety electronics also combine additional functions: UCM detection, absolute shaft encoder, door zone switch, shaft end switches. A backup battery is supplied in the electronic interface box to ensure operation also in case of power loss.


  • Fast and easy installation
  • Shaft efficiency: more space for car
  • Component cost savings due to less components in the shaft: no Overspeed Governor, no Tension Weight, no Governor Rope Loop
  • Maintenance cost savings due to absence of Overspeed Governor, Rope and Tension Weight
  • Safety electronic car combine additional functions, such as UCM detection absolure shaft positioning, Door zone switch and Shaft end switches
  • Compliant with EN 81-20/50
  • ESG stopping and holding element compliant with EN 81-21 for reduced pit and headroom applications, substituting the hinged buffer in the shaft

Speed/Load Graphic

SG Type Load 
on Safety [kg]
max. Rated 
Guide Rail [mm]
ESG-17BS 530 - 1.680 2,00 9 - 16 machined oiled/dry
ESG-25U 500 - 2.500 2,00 9 - 16 machined oiled/dry

For 3D drawings in STEP Format, please refer to the Download Section below.


Please note that this is just a selection of all available documents. You can access all documents from the SERVICES > DOCUMENTS SEARCH AND DOWNLOAD page and all certificates from the SERVICES > CERTIFICATES SEARCH page.

Can't find what you're looking for?

We can offer customized solutions for your specific needs.

Wittur has updated its privacy policy according to GDPR. By continuing to browse the site, you are agreeing to our privacy policy.