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Calorimetric and Thermal Musings |
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Dr. Jesse Yoder, President, Flow Research.com Email: Jesse@FlowResearch.com
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Is a calorimetric
flowmeter a type of thermal flowmeter or is it a distinct technology? I always
thought it was something different, but now the calorimetric people are saying
it is just another name for thermal. The issue is important for historical
purposes, among other reasons. In my August Flow Control article I wrote about
the history of thermal and said it was developed by FCI, Sierra, and Kurz in the
mid-1970s. Then the mass flow controller people said they had thermal flowmeters
before that, so I wrote another article for the November issue of Flow Control
in which I concluded that MFCs got their start in the early to mid 1970s, about
the same time as thermal dispersion meters. Now the calorimetric people are
saying that Gunther Weber had developed this principle by 1968 - though I don't
believe it was a flowmeter. So is there any significant difference between
calorimetric meters and thermal flowmeters and if so, what is it? If they are
the same, why do they still have different names? |
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