Pushbutton Access Control – Mechanical Digital Door Locks

Mechanical digital locks are also known as pushbutton locks because this is what they are.  This page details the features, advantages and applications for this simple but effective form of access control.

What are Pushbutton Locks?

Pushbutton locks are robust, all-mechanical locks offering the dependability and convenience of key-less access control for a wide and continually expanding range of applications.  Each model operates with an entry code that is set when the lock is installed.  Codes can be reset in seconds, without removing the unit from the door.

Economically designed to provide effective and efficient access for authorised persons only – in offices, warehouses, on storerooms, locker rooms, cabinets, garages, caravans, sheds, gates, at home, almost anywhere – without the inconvenience of keys.

How do they work?

Pushbutton locks operate only when the correct buttons are pushed in the proper sequence and the turn knob is rotated.  A new combination is set when the lock is installed using as many of the 5 buttons as desired.  Buttons may be pressed individually or in unison.  Example: a combination of 2-3-4 pushed individually is NOT the same as 2 and 4 together, then 3.  Thousands of possible combinations make it virtually impossible to guess a code.


  • No keys or cards
  • No wiring
  • Combination is chosen by the owner, can be changed as often as needed
  • Variety of models fit any installation, from a government research lab to a tool box
  • Cannot be picked
  • Fully mechanical – not affected by power failures
  • Robust, weather-resistant all-metal construction
  • One hand operation
  • Large easy-to-depress pushbuttons
  • Never locked out


  • Reduce hassle – no keys to issue or control, no keys to retrieve when employees or tenants leave
  • Saves money – no keys or key cylinders to change or replace
  • Saves time – change combinations cost-free in seconds whenever there is a change in personnel


  • Public buildings: public entrances, WCs
  • Commercial buildings: offices, computer rooms, lifts, alarm systems, garages
  • Industrial buildings: hazardous storage, tool boxes, research labs
  • Airports: runways, restricted areas
  • Schools and universities: audio-classrooms, dormitories, kitchen areas, staff rooms
  • Hospitals and medical centres: drug storage, exam rooms, food storage, laboratories
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  • Southern Water Various locations throughout the South

    Thanks to the designer, project manager and all engineers whose work during this contract was carried out with efficiency, professionalism and care.

  • Mr A Sharp Reading, Berkshire

    Pleasant engineer who provided an efficient service.

  • Roger Harvey Berkshire

    Customer service has always been good and a great deal of time and effort was put into sorting out the issues we had with the system when it was first installed.  We always found CIA to be a very reliable company and a company we would be more than happy to recommend.

  • Mrs F K Stephens West Sussex

    Whenever there has been a problem, it has been sorted.  Care is always taken and your men are very polite and pleasant.  Thank you.

  • Mr M Cxxx Portsmouth, Hampshire

    Quick response and very polite.

  • Mr A Dxxxxxx Chichester, West Sussex

    The same technician has serviced our system several times.  He knows us and he knows the system.  Always helpful, friendly, cheerful and professional.

  • Mr P Bxxxxx Stubbington, Hampshire

    Excellent explanation of system options and how to use it. Nothing was too much effort. Engineer took his time to think about the best way to overcome problems that were not apparent at the time of survey. He made suggestions as to the best way to overcome them. Everything was done and cleaned up. Thank […]

  • Mrs J Gxxxx Southampton, Hampshire

    Technician and office always pleasant.

  • Ken Nash Portsmouth, Hampshire

    We have used the security system for the last 17 years on a daily basis without one false alarm, very impressive…

  • Mr P A Forbes Portsmouth, Hampshire

    Nice young man, very polite and very helpful, also very tidy worker.

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