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Description
Mid to late 20th century D.C. Volt meter - KS-3001 - Res. 100,000 ohms - Volts for Full Scale = 150 - Model 502 - No. 6523 - Weston Electrical Instrument Corp - Newark, NJ, USA. Black metal case with glass window and three knobs on reverse.
"A voltmeter is an instrument used for measuring electric potential difference between two points in an electric circuit. It is connected in parallel. It usually has a high resistance so that it takes negligible current from the circuit." (Source: Wikipedia)
"The Weston Electrical Instrument Company was founded in 1888 by Edward Weston in Newark, New Jersey. Before founding the company, Edward Weston developed a saturated cadmium cell, a battery that produced a voltage stable enough to be used as a calibration standard for voltmeters. His eponymous company later went on to sell these standard cells, as well as portable test equipment. They were the first to develop accurate portable direct reading voltmeters and ammeters, and the first portable light meter." (Source: MIT Museum)
Condition
Good Overall - Gentle wear
Dimensions
6" x 4.5" x 6" (Width x Depth x Height)