RE: Shower flow detection

["Hawes,Timothy Edward (GEG)" <haweste@xxxxxxx>]

Hi StUart,

I was looking at this a while ago, with DesG. He found this one (flow
switc=
h) from Farnell "water flow switch 15mm  372-0986 about =A36.50
each". But,=
as you say, it needs plumbing. The bit I was really trying to avoid was th=
e pressure drop they induce in the line as my showers are only gravity fed.

Temperature switches were also an option, but sourcing one with the right
c=
haracteristics wasn't a simple task, nor were they particularly cheap.
Howe=
ver, in the last couple of weeks I've been toying with using a DHW
cylinder=
stat clamped to the pipe. It's easy to fit, mains voltage rated, adjustabl=
e, doesn't impede the water flow and is cheap (especially as I've already
g=
ot a spare one !).

It's a job on the to do list, along with fitting the extract fan, so I'll
l=
et you know how I get on. Don't hold your breath though . . . ;-)

One last suggestion - if you've got a power shower unit fed from a mains
pu=
ll cord, take some contacts from the switch. It doesn't detect flow, but
do=
es save some messing around (Keith's suggestion that one :-)  )

Cheers,

Tim H.

> -----Original Message-----
> From: Stuart Meier  Sent: 26 January 2004 09:41
>=20
> Has anyone any useful ideas for detecting flow on a shower? I=20
> am currently
> thinking in terms of detecting the hotside warming up,=20
> thermistors etc.
> Alternative is a flow switch but that needs to be plumbed in=20
> and costs =A3xx not
> =A30.x
>=20
> Just wondered if there is a cute method I have overlooked?
>=20
> StUart

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