Grinnell College Physics Museum

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97 items

McIntosh Milliammeter

One of these is in the Smithsonian labeled a “dosage meter.” It probably is part of a medical fake.

AC Ammeter

0-15 Amperes Pattern 11

DC Voltmeter with Case

0-150 Volts DC

Voltmeter 420

0-10 Volts DC Model 420

AC Voltmeter

0-600 Volts AC Model RA

DC MilliAmmeter

0-750 MilliAmperes Model 1

AC Ammeter

0-5 Amperes AC

DC Voltmeter

0-250 Volts DC Model 31A

DC Ammeter

0-50 milliamperes DC Model 741-59

DC Ammeter

0-20 Amperes DC Model 1531

DB Voltmeter

-20 to 6 DB

DC Voltmeter

0-75 Volts DC Model 267

DC Voltmeter

0-500 Volts Model 301

DC Voltmeter

0-350 Volts DC Ferris

DC Voltmeter

0-500 Volts DC Ferris

DC Voltmeter

0-1.5 Kilovolts DC Model 350

AC Voltmeter

0-150 Volts AC Model 476

DC Milliammeter

0-30 milliamperes DC Model 301

AC Ammeter

0-10 Amperes Model 1534

DC MilliAmmeter

0-400 MilliAmperes DC

DC MilliAmmeter

0-15 MilliAmperes DC

ThermoAmmeter

0-5 Radio Frequency Model 425

DC MilliAmmeter

0-5 MilliAmperes DC

DC Voltmeter

0-10 Volts DC