Electronic Knob Cylinder


Modern and flexible


The electronic knob cylinder from Uhlmann & Zacher in modern stainless steel design replaces a mechanical locking cylinder. The door is opened using transponders (cards, fobs) and, depending on the version, also using radio switching modules or smartphones. The product is available in two radio technologies of Bluetooth® Low Energy and 868 MHz. In addition to new buildings, existing mechanical locking systems can also be replaced with the modern wireless access system.


Suitable for almost all types of doors


Thanks to the numerous available models, the electronic knob cylinder offers the right solution for almost all types of doors. Be it glass door, wooden door, plastic door, tubular frame door, escape door, fire or smoke resistant door. 


Versatile in configuration thanks to modular design


The product characterised by its modular design, as it allows individual components (cylinder housings, knobs) to be flexibly replaced and can thus be adapted to the respective installation situation and individual requirements.

With double knob cylinder, half cylinder, furniture lock adapter or cylinder housing for special lengths, round Swiss profile, Scandinavian oval or the fire protection cylinder for fire and smoke resistant doors up to T90, the electronic knob cylinder can be used universally.


Safe to disassemble and replace the battery only with authorisation


The electronic knob can be separated from the cylinder housing and thus be disassembled very easily with an authorised transponder. Even battery replacement and thus cover removal is possible just with appropriate authorisation.


Energy efficient


The electronic knob cylinder is characterized by a long battery life with up to 80,000 openings per battery set.


Transponder technology

MIFARE® (13,56 MHz)

Transponder technology

LEGIC® (13,56 MHz)

Transponder technology

EM/HITAG 125 kHz

OSS Standard Offline

868 MHz Radio

Bluetooth® Low Energy technology

Dust and waterproof according to protection class IP66 and thus protected against powerful water jets.

Intrusion detection system (IDS) - connection possible

Emergency exit locks DIN EN 179

Fire and smoke resistant doors DIN EN 1634


  • Modular design, which allows flexible replacement of individual components
  • Different lengths of profile cylinder available
  • Certified according to DIN EN 15684
  • Installation effort is less without drilling, no special tool required
  • Wireless assembly, since it is operated with batteries
  • Battery replacement and disassembly only with authorised transponder
  • Long battery life, up to 80,000 openings with one battery set
  • Permanent engaging (toggle function) without additional power consumption
  • Outdoor version, protection class IP66
  • Anti-panic versions using which the door can always be opened from the inside
  • PVD coating in gold, anthracite, bronze and black colours
  • Versions for fire resistant doors, inter alia up to T90
  • Can be integrated with an intrusion detection system
  • Operation via smartphone (in conjunction with Bluetooth® Low Energy)
  • Offline or online operation via radio network
  • Bluetooth® Low Energy possible in conjunction with MIFARE®
  • Transponder technologies MIFARE®, LEGIC® and EM/HITAG
  • Compatible with OSS Standard Offline
  • Different requirements are met depending on the system (Clex prime, Clex private, Clex public)

Modular construction


Thanks to the simple assembly of the universally applicable knob module with Uhlmann & Zacher locking cylinders, quick on-site conversion is possible without any problems. The combination of inidivual components creates a variety of electronic locking units.


Find out more here!


Data sheets
Clex prime CX6122 |
891 KB
Clex private CX2122 |
884 KB
Clex public CX8122 |
1 MB
Suitability for fire and smoke resistant doors up to T90 Proof IFT |
454 KB
Flyers & Brochures
Cylinder Brochure |
15 MB

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