Resistance Thermometer Bridge for Measurement of Temperatures in the Liquid Helium Range
- 1 August 1958
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 29 (8) , 715-716
- https://doi.org/10.1063/1.1716305
Abstract
A 33‐cps resistance thermometer bridge, suitable for precise temperature measurements in the liquid helium range, has been designed as a completely self‐contained unit. The amplifier has a gain of 120 db, band width of 0.3 cps, and input impedance of 10 kohms. With a power dissipation of 2×10−8 watts in the thermometer, resistance changes of 0.1 ohm can be detected. For a typical resistance thermometer this corresponds to a temperature change of 4×10−6°K at 2°K. Other features include high rejection of line‐frequency pickup, short recovery time after saturation, and a combination gain band‐width control which shortens the response time during preliminary balancing operations.Keywords
This publication has 1 reference indexed in Scilit:
- The Low Temperature Characteristics of Carbon-Composition ThermometersReview of Scientific Instruments, 1952