[Swansea Hackspace] Help with Tempreture sensor (100Kelvin to 350Kelvin)

[Ceri Clatworthy]

I would recommend a thermocouple,

cheep K type 0 - 1024 Cent.

but according to Wikipedia (http://en.wikipedia.org/wiki/Thermocouple)
'T' Type can go down to -185 C.

Normally I would use MAX6675, or MAX31855

which is a bit expensive but the latter claims to go down to -270 C

But I cannot test that :)

also both chips have a digital interface, - no messy analogue. nice clean
number :)

I have one set up on some kit here if you got some dry ice (Ha,Ha,)
Cheers

Ceri

On Thu, May 21, 2015 at 9:31 AM, David Rankin <rankin.dc at gmail.com> wrote:

> Hi All,
>
> I am just messing around with my Audino and the temperature sensor. I
> am wondering if it is this is even possible but I am trying to measure
> low temperature sub -100Celsuis
>
> So being very niave I tried it out in dry ice but when the sensor got
> only got close to its limit, I took it out (-35).
>
> I also looked around for better sensors and found these:
>
> http://www.scientificinstruments.com/product-detail/model-si-440-silicon-diode-temperature-sensors/
>
> http://www.scientificinstruments.com/product-detail/model-si-430-silicon-diode-temperature-sensors/
>
> So what I was wondering. Is it even possible to put a aurdiono in a
> cold cold fridge and meassure low temprtures with a better sensor? If
> not why not?
>
> Any advice or guidance would be really helpful?
> _______________________________________________
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> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
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