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Rectangular black plastic box with a raised glass display. There are two black plastic dials on the face; one is marked with a +. Below the glass display, there is a small glass electrical diode. Underneath the glass of the display, there is a paper sheet with a measurement scale reading “0”, “.2”, “.4”, “.6”, “.8”, and “1”. Below the display it reading from top to bottom: “DIRECT CURRENT”, “MILLIAMPERES”, “SIMPSON ELECTRIC COMPANY”, “CHICAGO, ILL., U. S. A.”. In tiny type, at the bottom reading from left to right, it reads “MODEL NO. 9”, “PAT. NO. 2,051,399”, and “SERIAL NO. 1042”. A black leather strap is connected by metal screws at the top of the box.

Accession Number:

Alternative Name: Ampmeter, galvanometer

Primary Materials: Plastic, glass, metal, leather


“5071B” is scratched into the plastic face at the top of the display.

Dimensions (cm): Height = 8, Width = 13.5, Length = 20


This is a device for detecting and measuring electrical current.


Good. There are minor surface scratches and some leather decay but nothing significant.

Associated Instruments:

Manufacturer: Simpson Electrical Company

Date of Manufacture:


Additional Information and References:

Historical Notes:

1) <I>DC Meters Model 9 series</i>. Last accessed February 3, 2015. <a href=””></a>.


  • Donated to UTSIC