You can now get your genuine Columbus 400A push button timers from electrical wholesalers and distributors, as part of the extensive range of Elkay Electrical energy management products.

A highly effective pneumatic timer, the Columbus is ideal for controlling fluorescent or incandescent lighting and offers an adjustable timing range between 10 seconds and 10 minutes.
Simply pushing the button on the Columbus operates the timer, switching on the lights. Once the time period has elapsed the unit automatically switches off the lights until re-activated.
It has normally open and normally closed contacts as standard, does not require a neutral feed and is supplied with M3.5 fixing screws.