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

reconfiguring the demonstration meter as a low-voltage voltmeter for single-cell and battery-pack readings

sized to mount alongside a tone generator for converting electrical signals into audible tones during sound-wave demonstrations

this ten-piece brass hooked weight set pairs five 50-gram and five 25-gram pieces with retractable hooks on both ends

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

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.