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Timeline for PT1000 drifts more than 100°C

Current License: CC BY-SA 4.0

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May 1 at 18:18 comment added Transistor @mbrig, (1) that box appears to be a subset of everything (which heats up to 135°C) and (2) that the expectation doesn't seem to match the measurements.
May 1 at 17:47 comment added mbrig @Transistor the question says "The box should be sealed and thermally isolated so we don't expect the temperature to rise over 100°C inside". What part of that is unclear?
May 1 at 12:16 comment added Chris H I'd want some independent verification of the temperature the inside reaches. A mechanical thermometer with a maximum temperature indicator is a fairly boring solution. One idea that appeals to me is putting a tidy piece of Fields metal or even candle wax in there. They'll melt around 60°C. Rose's metal gets you 100°C. This would be in addition to logging the internal temperature electronically.
May 1 at 9:05 comment added jpa @Barry By having thermal mass, isolation and limited time of operation. But I agree it should be verified.
Apr 30 at 22:29 comment added Barry If the sealed box is in a chamber that heats up to 135C, how does the inside of the box not go above 90C?
Apr 30 at 20:43 history edited Transistor CC BY-SA 4.0
added 109 characters in body
Apr 30 at 20:42 comment added Transistor It's not clear in your question. Edit required.
Apr 30 at 20:41 comment added Felix Kunz The outside (where the PT1000 is) heats up to 135°C. Inside shouldn't. We did some measurements in the past and measured maximal 85-90°C in the box. This was without electronics tough.
Apr 30 at 20:38 history answered Transistor CC BY-SA 4.0