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A Simple Microthermostat for use in Colorimetric and other Optical Measurements
Author(s) -
Marshall W. J.
Publication year - 1953
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1953.tb02827.x
Subject(s) - thermistor , laboratory flask , thermal , materials science , simple (philosophy) , temperature measurement , optoelectronics , optics , analytical chemistry (journal) , chemistry , electrical engineering , chromatography , thermodynamics , physics , engineering , philosophy , epistemology
A microthermostat has been constructed in an optical cell of sido 6 cm. It has beon used in making colorimetric measurements in the G.E. recording spectrophotometer and in other experiments employing optical techniques, but the method can equally well be applied to controlling the temperature of other small vessels such as beakers and flasks. The thermometric element is a small thermistor, and the temperature is controlled by the associated bridgo circuit operating an electric heater of negligible thermal capacity.