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DC Voltmeter

DC Voltmeter 0.0 to 7.5 Volts Cat. No. 3057K, Serial No. 37257

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Signal Corps Test Unit I-176

Signal Corp Test Unit I-176, serial no. 0238, containing a Triplet Elec. Inst. Co. multimeter. The Physics Department probably obtained this unit from army surplus in the decades following World War II.

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McIntosh Milliammeter

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

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AC Voltmeter

0-15 Volts AC

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AC Voltmeter

0-150 Volts AC

http://omekax.grinnell.edu/PhysicsInstrumentMuseum/files/original/74a855ce688f05e2d18a3e3c722af354.JPG image/jpeg thumbnail

AC/DC Vacuum Tube Voltmeter

0-15 Volts Model 1800-A

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AC Ammeter

0-15 Amperes Pattern 11

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DC Voltmeter

0-5000 Volts DC

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AC Voltmeter

Analog Voltmeter 0-150 Volts DC Cat.No. 3064 G

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DC Voltmeter

Analog Voltmeter 0-150 Volts DC Cat. No. 3062 T

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DC Ammeter

0 - 10 Amperes DC, Cat. No. 3057S

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DC Voltmeter

Analog Voltmeter 0-7.5 Volts DC Cat. No. 3057 K

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DC Voltmeter

Analog Voltmeter 0-7.5 Volts DC Catalog No. 3057K

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DC Ammeter

Analog Ammeter 0-5 Amperes DC Model 280

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DC Ammeter

Analog Ammeter 0-30 Amperes DC model 280

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DC Voltmeter

0-26 Volts DC Model 280

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DC Voltmeter

0-30 Volts DC Model 280

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DC Voltmeter

0-30 Volts DC Model 280

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DC Ammeter

0-10 Amperes DC Model 280

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Watt Hour / Ammeter

kilowatt hour scale and ammeter scale

http://omekax.grinnell.edu/PhysicsInstrumentMuseum/files/original/a9b417b8a832f5a4fb430ea1dc343036.JPG image/jpeg thumbnail

AC Ammeter

0-3 Amperes AC Model 735

http://omekax.grinnell.edu/PhysicsInstrumentMuseum/files/original/690fc8a7b049a84c4361ff677f14b82a.JPG image/jpeg thumbnail

DC MilliVoltmeter with Case

0-100 Millivolts DC Model 1

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DC Voltmeter with Case

0-150 Volts DC

http://omekax.grinnell.edu/PhysicsInstrumentMuseum/files/original/fc71ae570b868c4d3d1510d68fdb736a.JPG image/jpeg thumbnail

AC Ammeter

0.5-5 Amperes AC Pattern No. 11 Serial No. 833837