[Stoves] Infra-red thermometer choice and supply

[Crispin Pemberton-Pigott]

Dear Steve

 

>Yes. The sensor material needed for high temperatures isn't the same as the
one for low temperatures, low temperatures are effectively invisible to
them,.



Makes sense. What do you think Damien can use? Is there a practical device
working the 0-1200 range?

>>Yours must have 4 digits. Maybe more? How accurate is ‘precision’?


>We have a good, pure graphite target, emissivity pretty damned close to
one. Against type C thermometry, in a reducing atmosphere, at 1800C, we're
close to +/- 25 C, we think. 



That is 1.2% (K). Pretty good at white heat.


>BEST measurement, in standards lab conditions (NIST, NPL) at these temps is
only +/- 5 deg.  

 

¼ of a %. Excellent. Steve Garrett provided me with some thermocouple
suggestions for super accurate measurements but not at anything like that
temperature. The Agilent 34972A can read them to 6½ digits, or pretends to!
But of course that is not IR.

 

Regards

Crispin 

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