----- Original Message ----
> From: David Duffy (AVD) <david@audiovisualdevices.com.au>
[snip]

> I had thought about the finger (optical) sensors. I'm not sure if you =

> can buy them cheaply. A DIY sensor that would stay on overnight may be =

> hard to make.
> David...
> =

> -- =

> ___________________________________________
> David Duffy=A0 =A0 =A0 =A0 Audio Visual Devices P/L
> Unit 8, 10 Hook St, Capalaba 4157 Australia
> Ph: +61 7 38235717=A0 =A0 =A0 Fax: +61 7 38234717
> Our Web Site: www.audiovisualdevices.com.au
> ___________________________________________
> =


A lot of the=A0finger sensors are disposable these days
it's just a piece of adhesive fabric with the led(s) and
photo diode or transistor in it.

I do believe they use two different wavelength led's so they
can also determine O2 saturation.

If you know any=A0Emergency room=A0nurses you may be able
to get your hands on a couple of them.


Peter van Hoof



      =


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