On Thu, 17 Jan 2008 01:28:07 +0000, Appin wrote:

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http://www.elkay.co.uk/product.asp?id=2&catid=1

Sadly, however, in my experience the Elkay models, with the exception of
the pneumatic ones, which have a very limited timing range with any
degree of reliablility, are not at all reliable in terms of longevity.
Expensive and unreliable. But I haven't found a less-bad answer to the
problem of a 20 minute timing requirement.

How about a shorter time?

The house I'm in now had an external push delay switch to light the
garden floods when coming in from the garage (at the far end of the
garden, and round a corner).

The switch has died and the rubber seal over the top has perished
(probably linked...) so I want to replace it. I can't easily use a PIR as
it would need to cover a narrow path over a distance, and be sensitive to
people walking directly towards or away from it, which they generally
aren't.

I found a direct replacement (basically an indoor hydraulic switch with a
rubber cover and seal for the switch-surface box join in the 'exterior
fitting' kit) but that was almost £40 (!)

Any other ideas for a simple exterior push-on, delay-off switch with a
couple of minutes delay that can handle maybe 1000W of mains lighting?