1A DC Interchangeable Dial for Demonstration Meter Metal Labware_Metal Bases & Rods Center-zero galvanometer reading 1-0-1mA at

Center-zero galvanometer reading 1-0-1mA at plus-or-minus 2

providing a stable heating platform for introductory chemistry and general science classroom work

this decade box selects cascaded values for RC-time-constant

Hand-cranked worm-and-wheel drive with a rotation dial between clear acrylic plates

Plastic interchangeable dial with sealed shunt or multiplier housing

1A DC Interchangeable Dial for Demonstration Meter Metal Labware_Metal Bases & Rods Center-zero galvanometer reading 1-0-1mA atOne amp AC scale on a 315x115mm laminated panel with sealed shunt, dropping into the demonstration meter as a 0 1A AC ammeter for transformer and household current measurements.