Minute Timer Lab Equipment and Supplies_Metal Labware Battery-powered portable digital voltmeter measuring

Battery-powered portable digital voltmeter measuring 0-20V DC at plus-or-minus 1-digit accuracy on a large LCD

fixed bipolar 8V and high-voltage 125/250V DC outputs

providing the cleanest hand-operated way to make and break a circuit during early electricity instruction with stackable modules

and a 60cm multicolored scale on a hollow wooden resonance box let students vary length and tension to test the physics of vibrating strings

Minute Timer Lab Equipment and Supplies_Metal Labware Battery-powered portable digital voltmeter measuringEconomical minute timer setting intervals up to one hour via a top knob, sounding a signal at the end of the period for classroom reaction monitoring and general laboratory run timing.