Elkay Columbus Pneumatic Time Delay Switch Product Code: 68088

Adjustable pneumatic time delay switch saves energy by ensuring lighting is not left on. Replaces existing single gang wall switch. No neutral required, adjustable from 10 seconds to 10 minutes for fluorescent and incandescent lighting.


  • For Fluorescent & Incandescent Lighting
  • Replaces Existing Single Gang Wall Switch
  • Automatically Turns Off Lighting After a Set Period of Time


240V. 6A Incandescent (3A fluorescent).
Additional Information
Technical Specification
  • Brand : Elkay
  • Total Product Weight : 105 kg
  • Model No : 400A
  • Colour : White
  • Pack Size : 1
  • Manufacturer Guarantee : 1 Year Guarantee
  • Pieces in Pack/Case : 1
Product Contents
Pneumatic timer, fixing screws and concealing caps.
Delivery & Returns


Standard delivery: €15

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€22.45 Incl. 20% VAT

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Elkay Columbus Pneumatic Time Delay Switch is rated 3.2 out of 5 by 45.
Rated 5 out of 5 by from Well made product Bought this to replace a failed unit which was a different brand. It was easy to fit and seems a better made product.
Date published: 2019-07-06
Rated 4 out of 5 by from Simple reliable timer switch These basic Columbus switches don't need a lot of room behind as the working parts are in front with just the terminals at the back like a regular switch. This means you can fit one onto a shallow back box with no trouble, whereas some of the electronic timer switches have all their gear in the back of the switch which means a deep box is required. You cant set precise time delays with these switches, and they seem to delay longer in cold weather than hot as well. If that is not an issue for you then I would recommend the product as a basic reliable unit. I've fitted dozens and had no problems. Practical setting is delay from a couple of seconds up to about 90 seconds or 2 monutes. Any more delay set will tend to result in the switch sticking on permanently when the weather gets cold.
Date published: 2019-05-23
Rated 4 out of 5 by from Good item Dose as it says on the tin but not a great adjustment on the spring
Date published: 2019-05-15
Rated 4 out of 5 by from Ideal for Normal Lighting Overall the timer is excellent with fast break contacts (snap action) that produces flicker free operation during timing and a clean switch-off at the end of the timing period. Note: Setting the timing period is approximate and requires rear access to the switch so setting the required time before final installation is recommended. Some timing variation occurs between successive cycles.
Date published: 2019-02-25
Rated 5 out of 5 by from Great little unit Easy to fit and setup. Works just as expected would recommend it
Date published: 2019-01-12
Rated 3 out of 5 by from Difficult to adjust Had to return first one, as time delay couldn't be set for more than 15 seconds. Setting the time is tricky, seems to be little variation in adjustment between 30 secs and 5 minutes - not very reliable. However, once its on a setting that you're happy with, it seems fairly consistent.
Date published: 2019-01-09
Rated 2 out of 5 by from Seemed OK but then broke Bought this to operate an outside light but the switch failed to return to the off position after less than a month of use. Returned it for an exchange - now I'm hoping the new one fares better. The assistant at Screwfix wasn't surprised I'd returned it as she'd had the same problem! Disappointed with the quality, but happy with the good customer service from Screwfix.
Date published: 2018-11-01
Rated 5 out of 5 by from Be careful on set-up The screw to adjust the time is not linear so adjust it slowly until the required time is reached. Good robust product.
Date published: 2018-07-13
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