Sargent Welch Plancks Constant Apparatus No. 2120 Vintage 6 EXTRA TUBES For Sale

Measure planks constant at home

Fun science project.

I got too much stuff time to part so I can get more

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It comes with extra tubes

Hard to find

The Sargent Welch Planck's Constant Apparatus No. 2120 is a vintage physics laboratory demonstration device manufactured by the Sargent-Welch Scientific Company in the United States. This unique apparatus features a coarse and fine voltage adjustment mechanism, as well as an integrated phototube accompanied by a nanometer calibrated dial. The sturdy construction of the Cenco cast iron base adds to the durability and authenticity of this collectible piece of scientific equipment, making it a valuable addition to any vintage science collection.