Early Platinum Electrical Resistance Thermometer, 1871-1890
- Made:
- 1871-1890
Early form of platinum thermometer, one of nine, in glass tube with bitumen and four wire terminals, unsigned, 1871-1890.
Details
- Category:
- Heat
- Object Number:
- 1930-363 Pt5
- Materials:
- glass, mica, copper (metal), platinum (metal), solder and bitumen
- Measurements:
-
overall: x 420 mm x , 12 mm, .045kg