Interscale Demonstration Meter, 5mA / 100mV FSD Lab Supplies_Lab Burner Accessories mounted on a 4mm-terminal base

mounted on a 4mm-terminal base that drops inline with other modular circuit-demonstration components

yielding a flatter field profile for plane-of-symmetry demonstrations

supplying the third-color signal line for breadboarded circuits where black and red rails are already assigned

step-up/step-down ratios

illustrating how current direction and field together produce force

Interscale Demonstration Meter, 5mA / 100mV FSD Lab Supplies_Lab Burner Accessories mounted on a 4mm-terminal baseClass visible 12 inch demonstration meter with magnetically damped moving coil and Perspex front and back panels, accepting interchangeable PH1118 scales for AC DC ammeter or voltmeter use.