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History of the Guarded-Hot-Plate Apparatus at NIST

The following photographs will give you a perspective on the development of the Guarded-Hot-Plate Apparatus at NIST.

1. Final version of NIST guarded-hot-plate apparatus built in 1929 by Van Dusen. 2. Chock Siu (sitting), Frank Powell (l), and Tom Watson in front of 1929 NIST guarded-hot-plate apparatus (1973) 3. Prototype Robinson line-heat-source guarded- hot-plate apparatus (1978).
Final version of NIST guarded-hot-plate apparatus built in 1929 by Van Dusen. Chock Siu (sitting), Frank Powell (l), and Tom Watson in front of 1929 NIST guarded-hot-plate apparatus (1973) Prototype Robinson line-heat-source guarded- hot-plate apparatus (1978).
4. The circular "hot plate" being installed by Research Associate Dave Ober (l) and mechanical engineer Mahn Hee Hahn. 5. Technicians John McAuley (l) and Rick Petersen instrument the new 1000-mm guarded hot plate. 6. NIST one-meter line- heat-source guarded-hot-plate apparatus (1980).
The circular hot plate being installed by Research Associate Dave Ober (l) and mechanical engineer Mahn Hee Hahn. Technicians John McAuley (l) and Rick Petersen instrument the new 1000-mm guarded hot plate. NIST one-meter line- heat-source guarded-hot-plate apparatus (1980).

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Last Updated on January 22, 1999 by Paula Svincek