GE model DW-68 light meter in leather pouch
date: label: date made
content: ca 1950
name: label: maker
content: General Electric Company
notes: label: Description (Brief)
content: A steel cased, hand-held light meter with a slotted, hinged hood. Rotary dial on front, meter on back. Includes a leather carrying pouch. Dial on front graduated: "Light" 1 through 70 foot candles, "f-stop" 45 to 1, "Time" 1/800 to 120 seconds, "Expo[sure] Index" with "Cover Closed", "Cover Open", and Hood Off / Incident Light" from 1.2 to 800. Label reads: "Serial No. R05035 / Exposure Meter / Use American Standard / Exposure Index Numbers / General [logo] Electric / N.P. 135330 Made in U.S.A. / Type DW-68". Meter scale on back "Light (Foot candles)" graduated 0 through 70.
label: Description (Brief)
content: There are many ways to measure light, by its color, intensity, quantity, etc. Each type of measurement requires a different type of meter, and those meters have changed significantly over the past 300 years. This particular meter measures light intensity in foot candles and was designed to be portable, hence the leather belt-pouch. Online comments report that this model of GE meter was not a successful product and was soon replaced by an updated version.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2022.0278.01
label: accession number
content: 2022.0278
label: catalog number
content: 2022.0278.01
objectType: label: Object Name
content: light meter
physicalDescription: label: Measurements
content: meter: 3 3/4 in x 2 3/8 in x 1 1/4 in; 9.525 cm x 6.0325 cm x 3.175 cm
label: Measurements
content: pouch: 4 1/4 in x 3 in x 1 3/4 in; 10.795 cm x 7.62 cm x 4.445 cm