pH 1-11 Indicator Paper Dispenser Handle Type_Twisted Wire sized to span single-cell up

sized to span single-cell up through stacked-battery voltages on a single classroom instrument

sized for finer-gauge resistance demonstrations and small-scale heating elements where the heavier gauges would over-deliver current

point discharger

sized for compass-deflection and small-scale field-line investigations

Reproduces Ewald von Kleist's 1745 charge-storage device with concentric metal cups around a plastic dielectric

pH 1-11 Indicator Paper Dispenser Handle Type_Twisted Wire sized to span single-cell upDispenser feeds pH 1 11 indicator strips one at a time for quick bench top pH testing without cross contaminating the stock supply.