Re: [Phys-l] Cheap Classroom projec to sense water temperature

[John Denker <jsd@av8n.com>]

On 05/05/2010 08:06 AM, CARABAJAL PEREZ, MARCIAL ROBERTO wrote:

> We are working in a classroom project to develope a water temperature
> meter. It should be built up with little electronics and using a coil
> of wire copper as temperature sensor device. I would like to know if
> you have seen something like this working and can bring me any
> detail.

I've seen lots of things like that.

Please ask a more specific question.
 -- What is the point of the project?
    If all you wanted was a "water temperature meter", you would
    be better off using a thermistor ... or a liquid-in-glass 
    thermometer.
 -- How much is "little electronics"?  
    Does it allow or disallow a digital voltmeter?
 -- Have you tried it?
    What (if anything) was non-trivial or non-obvious about it?