Calibration of a balanced thermistor bridge scale

1969 ◽  
Vol 12 (7) ◽  
pp. 994-997
Author(s):  
A. V. Elin
Keyword(s):  
Thermistor Bridge

A Digital Actinometer Utilizing a Thermistor Bridge Circuit

1970 ◽  
Vol 41 (8) ◽  
pp. 1231-1232
Author(s):  
Robert R. Birge ◽  
Donald C. Johnson
Keyword(s):  
Bridge Circuit ◽  
Thermistor Bridge

A Low-Noise Thermistor Bridge for Use in Calorimetry

1974 ◽  
Vol 20 (8) ◽  
pp. 1009-1012 ◽  
Author(s):  
Robert L Berger ◽  
Walter S Friauf ◽  
Horace E Cascio
Keyword(s):  
High Speed ◽  
Platinum Resistance Thermometer ◽  
Low Noise ◽  
Platinum Resistance ◽  
Resistance Thermometer ◽  
Thermistor Bridge ◽  
Flow Calorimeter ◽  
Titration Calorimeter ◽  
Lock In

Abstract A precision thermistor bridge and thermistor is described for use in a thermal titration calorimeter or a high-speed stopped- or continuous-flow calorimeter of the Roughton type. These are compared and evaluated with regard to several other types of detectors, including the platinum resistance thermometer, thermocouple, transistor thermometer, and capacitance thermometers. At this time the best detection for our purpose seems to be a specially constructed 20-100 kΩ thermistor used in conjunction with a new ac lock-in amplifier bridge. The sensitivity of the system is equivalent to a peak-to-peak noise of 25 x 10-6 °C, with a 100-ms time constant and 1 µW power dissipation in the thermistor. Long-term drift of the bridge, without an oven, was 1 x 10-6 °C/min.

A thermistor bridge using light-emitting diodes

1973 ◽  
Vol 50 (10) ◽  
pp. 684 ◽  
Author(s):  
A. M. Ferguson ◽  
L. F. Phillips
Keyword(s):  
Light Emitting Diodes ◽  
Thermistor Bridge ◽  
Light Emitting

EBULLIOMETRY AND THE DETERMINATION OF THE MOLECULAR WEIGHTS OF POLYMERS: PART III. CONSIDERATIONS ON THERMISTOR WHEATSTONE BRIDGES

1959 ◽  
Vol 37 (12) ◽  
pp. 1365-1373 ◽  
Author(s):  
W. R. Blackmore
Keyword(s):  
Atmospheric Pressure ◽  
Background Noise ◽  
Wheatstone Bridge ◽  
Thermistor Bridge ◽  
Molecular Weights ◽  
Boiling Points ◽  
Pure Solvent ◽  
Unbalance Voltage

It is shown that a d-c. thermistor Wheatstone bridge may be used in ebulliometry to measure the small temperature differences which are observed between the boiling points of polymer solutions and the pure solvent. A relationship is derived between the thermistor bridge unbalance voltage and the solute molecular weight, which it is desired to measure. It is shown that a bridge composed of suitably matched thermistors may be made independent of the gross changes in boiling point of both solution and solvent produced by changes in atmospheric pressure. The possibility of the current flowing through the thermistors disturbing the measurements is discussed and in situ measurements of thermistor dissipation and time constants are given. The sensitivity attainable with various thermistor bridges and modern amplifiers at full gain is calculated and shown to be much greater than may be employed with the usual type of ebulliometer. The reason for this is the relatively large background noise (random temperature fluctuations) produced in the ebulliometer by the boiling process itself.

A thermistor bridge for use in calorimetry

1967 ◽  
Vol 44 (4) ◽  
pp. 290-292 ◽  
Author(s):  
G H Nancollas ◽  
J A Hardy
Keyword(s):  
Thermistor Bridge

Linearization of High Precision Human Body Temperature Measurement Circuit Based on NTC Thermistor

2015 ◽  
Vol 713-715 ◽  
pp. 381-384
Author(s):  
De Jun Li ◽  
Chi Gang Xing
Keyword(s):  
Body Temperature ◽  
The Body ◽  
Measuring System ◽  
Measurement Circuit ◽  
Actual Measurement ◽  
Thermistor Bridge ◽  
Ntc Thermistor ◽  
Human Body Temperature ◽  
Body Temperature Measurement ◽  
Linearization Problem

In the micro-climate cloth researching, we usually need to accurate measuring the body temperature, in this paper we choose the constant-voltage temperature measuring system based on the NTC thermistor to measure the temperature. Because the resistance of the thermistor and the temperature is not linear, so this will cause the output of the measurement circuit is not linear. In actual measurement we usually require the output of the circuit varies linearly in the required range. This paper mainly research the linearization problem of the NTC thermistor bridge circuit in the required temperature range.

Precision RF Voltage Standard Using a Thermistor Bridge Covering the HF-UHF Range

1978 ◽  
Vol 27 (4) ◽  
pp. 385-388 ◽  
Author(s):  
Futoshi Uchiyama ◽  
Kyohei Yamamura ◽  
Ichiro Yokoshima
Keyword(s):  
Voltage Standard ◽  
Thermistor Bridge
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