A High Precision Thermostat for the Isotopic Analysis of Water by the Falling Drop Method
作者:
M. Ioanoviciu,
期刊:
Isotopenpraxis Isotopes in Environmental and Health Studies
(Taylor Available online 1968)
卷期:
Volume 4,
issue 8
页码: 302-305
ISSN:0021-1915
年代: 1968
DOI:10.1080/10256016808552006
出版商: Taylor & Francis Group
关键词: circuits;isotope analysis;temperature;water;control system
数据来源: Taylor
摘要:
An a.c. bridge thermostat, using two thermistors mounted in two opposite arms as temperature sensing elements, is described. The unbalanced bridge voltage is rectified, after a previous amplification, by a phase sensitive detector, and it is applied to the input of the final stage which controls the heater. The thermostat can be used to maintain the temperature of a liquid bath with a 0.0005°C precision and can be easily reset to different temperatures in the operational range of the thermistors.
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