i’ve run a search of the forum and haven’t found much data on it. i wanna put up a solar sensor. i plan on building a solar sensor that detects sunlight but until then i wanna build one of the sensors that i’ve heard about on here. its a glass jar thats painted black on the inside with a temp sensor inside. the sun hits it and makes it warmer then the ambient air, thus determining the solar gain.
how big of a jar is recomended to be used?