Useful for a variety of laboratory demonstrations, this 20Ω rheostat provides a variable resistance in electrical circuits. Oxidized constantan wire is wound on a vitreous enamelled tube. A sliding contact carriage, mounted on the slide bar, carries a phosphor bronze contact for long life. The rheostat has three binding posts with 4mm sockets for electrical connections: one at each end of the winding and another at the end of the slide bar. * Resistance 20Ω * Maximum current 4.2A * Tube size: 300 x 44mm * Eisco type PH1151E https://elecena.pl/product/27243856/eisco-rheostat-20-ohm 2024-11-12 https://elecena.pl/product/27243856/eisco-rheostat-20-ohm 2025-04-07 https://elecena.pl/product/27243856/eisco-rheostat-20-ohm 2025-05-25 https://elecena.pl/product/27243856/eisco-rheostat-20-ohm 2025-08-11