Copper-Iron Thermopile Lab Supplies_Tongs holding twelve tubes up to

holding twelve tubes up to 22 mm diameter for classroom and professional bench setups

Clear-coated wooden A-ramp at 17 inches long paired with a double-ended cone roller that appears to travel uphill while its center of mass actually descends along the diverging rails

sized to accept a bell jar for atmospheric-pressure and vacuum demonstrations

this hydrometer ships in a hard plastic protective case

For driving student-built electronics and optics circuits

Copper-Iron Thermopile Lab Supplies_Tongs holding twelve tubes up toSeven junction copper and iron thermopile from four 130mm wires of each metal, the series arrangement amplifying the Seebeck voltage for radiant heat detection experiments.