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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