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

[Davies T.]

Dear David,

Are we measuring temperature on the Celsius or Rankine scale?
Well, that's got that over with.

Most commercial semiconductor devices are only specified from
0 to 50 Celsius. If you pay a bit more you can get extended temp
ranges e.g. -20 to +70, but beyond that you are looking at very
exotic (and expensive) parts. If you can place the sensor in the
fridge and keep the micro outside, you stand a chance.

Solid-state sensors e.g. Dallas are out, we are looking at
thermocouples and platinum 100 sensors - with their
associated amps outside the fridge, of course!

regards

Timothy Davies

________________________________________
From: hackspace-bounces at swansea.hackspace.org.uk [hackspace-bounces at swansea.hackspace.org.uk] on behalf of David Rankin [rankin.dc at gmail.com]
Sent: 21 May 2015 09:31
To: hackspace at swansea.hackspace.org.uk
Subject: [Swansea Hackspace] Help with Tempreture sensor (100Kelvin to  350Kelvin)
ve 
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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