Bob Eager wrote:
On Tue, 19 Dec 2006 20:36:47 UTC, Chris Hodges
wrote:


Bob Eager wrote:

You can still get these; they're pneumatic. There are also electronic
versions.

Two way is tricky, but if they're going to go off in 5 minutes, just
wire them in parallel. The existing cabling will be able to handle that,
with a wire to spare.

screwfix still do pneumatic ones, RS & Farnell no longer do, but they do
offer electronic "equivalents".


Strange that Farnell don't, because CPC do...the pneumatic ones are
PL400A.

There's a few things that you can get from CPC but not farnell - unless
you've got both catalogues and a purchasing department.

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