These BTU meters are refurbished in the US and are now all black.
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Thursday, October 20, 2011
BTU Solar Meter
BTU Solar Power Analog Meter. This meter measures solar radiant energy intensity directly transmitted through glass in units of BTU's. Effective tool showing the relative effectiveness of various films in blocking solar radiant heat. Especially useful for showing how a very dark dyed film may allow far more energy to pass through than a much lighter metallic film.
These BTU meters are refurbished in the US and are now all black.
These BTU meters are refurbished in the US and are now all black.
1 comments:
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