Solar Sensor

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?

The jar needs to be clear glass, and just large enough to hold the sensor in. You need to paint the inside of the lid black. The sensor sits inside the upturned bottle. Hope that clarifies.

This is the solar sensor that I use and it works beautifully.

Here’s a picture that I downloaded from this board in the past: