Center-Zero Moving Coil Galvanometer, 30-0-30mA Capacity_10mL the drilled aluminum ball gives

the drilled aluminum ball gives a lightweight contrast to steel and brass balls of the same size in pendulum period and momentum-transfer demonstrations

letting students switch between low and mid-current scales without swapping instruments

Numbered life-size human skull model with 55 labeled anatomical features and painted sutures

and radial symmetry for marine biology teaching

Center-Zero Moving Coil Galvanometer, 30-0-30mA Capacity_10mL the drilled aluminum ball givesHigher range 30 0 30mA center zero galvanometer at 20mA sensitivity and plus or minus 2. 5% accuracy, sized to detect bidirectional currents stronger than the milliampere class meters can read.