Instruments Concept

Demonstrations in Instruments

Leeds & Northrup galvanometer in black case mounted on cast iron tripod stand with leveling screws, mirror and suspended coil visible through front window, terminal block on top
Safety

L & N Galvanometer

Students learn how a galvanometer detects small currents through the deflection of a suspended coil in a magnetic field. A mirror on the suspension reflects a laser beam onto a …
Welch demonstration galvanometer with center-zero scale (5-0-5), black metal housing with visible coil mechanism, circuit diagrams for VOLTS and AMPS configurations on the dial face, red binding posts and knobs on base
Safety

Demonstration Galvanometer

Shows how the same galvanometer movement becomes either a voltmeter (with a series multiplier resistor) or an ammeter (with a parallel shunt resistor). Students see that these are not fundamentally …
RCA Dynamic Demonstrator: four color-coded boards (blue AC Volts, red DC Volts, green DC Current, orange Ohms) with exposed circuit components and an RCA analog multimeter mounted at top center
Safety

Demonstration Multimeter

Students see the internal circuitry normally hidden inside analog multimeters. The demonstration boards show how series multiplier resistors, parallel shunt resistors, and bridge rectifiers adapt a single galvanometer movement to …
Front panel of 3W Demo Multimeter U21100 with large red LED display reading 1.517 V; hand holds a battery against the test leads
Safety

Lecture Multimeter

A large-format LED multimeter (3W Demo Multimeter U21100) displays voltage, current, and resistance in 2-inch digits visible across a lecture hall. Front and rear displays let the instructor read measurements …