Tellurometer EDM (Tellurometer CA 1000)

Like the original Tellurometer Micro-Distancer, the CA 1000 is a microwave EDM. Advertised as early as March 1972, the CA 1000 was said to be "the smallest, lightest, most flexible and widest performance EDM equipment yet produced." It was also said to have been "designed by surveyors for surveyors," and "designed for the American surveyor." It cost $4,000, and had a range of 150 feet to 25 miles. Each of the two units weighed 4 kg., including rechargeable nickel cadmium batteries sufficient for 5 hours' operation. This example is marked "Tellurometer CA 1000 Plessey." One unit is also marked "master--serial no. 1322." The other is marked "remote--serial no. 1321." Both units have a tag marked "PROPERTY OF MICHAEL BAKER JR., INC. CONSULTING ENGINEERS ROCHESTER, PA. JACKSON, MISS." Tellurometer became a part of the Plessy Group, a large British electronics firm, around 1967.
Ref: Tellurometer-USA, Model CA1000 Operator's Manual.
Advertisement in Surveying & Mapping (March 1972).
Currently not on view
Object Name
overall: 9 1/2 in x 25 1/2 in x 16 1/2 in; 24.13 cm x 64.77 cm x 41.91 cm
place made
South Africa: Western Cape, Province of the, Cape Town
ID Number
catalog number
accession number
Measuring & Mapping
Surveying and Geodesy
See more items in
Medicine and Science: Physical Sciences
Surveying and Geodesy
Data Source
National Museum of American History, Kenneth E. Behring Center
Tellurometer-USA. Model CA1000 Operator's Manual
American Congress on Surveying and Mapping. Surveying and Mapping

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