Measuring the Permeability of Rubber to Various Gases

1940 ◽  
Vol 13 (2) ◽  
pp. 326-347 ◽  
Author(s):  
A. S. Carpenter ◽  
D. F. Twiss
Keyword(s):  
Temperature Control ◽  
Test Piece ◽  
Diffusion Constant ◽  
Experimental Methods ◽  
Experimental Results ◽  
Thin Sheets ◽  
Accurate Temperature ◽  
Accurate Temperature Control ◽  
And Diffusion

Abstract The rate at which a gas passes through a sheet of rubber-like material and the rate at which a gas is absorbed by a block of the material both depend on the same factors, solubility and diffusion constant. The magnitude of these factors can be measured by absorption experiments carried out under specified conditions and the results can be used to assess the permeability of the material in sheet form. Experimental methods and suitable apparatus are described for following absorption and the manner of interpreting the results in terms of permeability is given. Besides such advantages as accurate temperature control, convenient size and ease of handling of the apparatus, the small size of the test-piece, and the elimination of the difficulty of producing uniform thin sheets free from pinholes, the method has the advantage that both factors, solubility and diffusion constant, can be assessed independently; this is not normally possible with direct permeation measurements. Some experimental results are tabulated.

scholarly journals Development of Accurate Temperature Control in Hot Strip Mill

1995 ◽  
Vol 81 (3) ◽  
pp. 191-196
Author(s):  
Takashi ODA ◽  
Yoshitaka KONDO ◽  
Seiji KONISHI ◽  
Hironori MURAKAMI ◽  
Masayoshi SUEHIRO ◽  
...  
Keyword(s):  
Temperature Control ◽  
Hot Strip Mill ◽  
Hot Strip ◽  
Accurate Temperature ◽  
Accurate Temperature Control

A Fast and Accurate Temperature-Control System Using Smart Temperature Sensors.

1998 ◽  
pp. 247-254
Author(s):  
Paul R. van der Meer ◽  
Gerard C. M. Meijer ◽  
Michiel J. Vellekoop ◽  
Harry M. M. Kerkvliet ◽  
Ton J. J. van den Boom
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Temperature Sensors ◽  
Temperature Control System ◽  
Accurate Temperature ◽  
Accurate Temperature Control

scholarly journals A System for Accurate Temperature Control of Small Fluid Baths

1979 ◽  
Vol 22 (87) ◽  
pp. 389-391
Author(s):  
V. I. Morgan
Keyword(s):  
Temperature Control ◽  
Electrical Heating ◽  
Temperature Controller ◽  
Accurate Temperature ◽  
Accurate Temperature Control

AbstractA temperature controller is described which uses a thermistor sensor and electrical heating to maintain the temperature of a small bath of fluid to within a few millidegrees.

Design of Automated Distillation Analyzer Based on STM32

2011 ◽  
Vol 383-390 ◽  
pp. 1215-1218
Author(s):  
Wen Gang Chen ◽  
Xiao Jie Song ◽  
Wei Liu
Keyword(s):  
Temperature Control ◽  
Control Method ◽  
Control Unit ◽  
Test Accuracy ◽  
Thermoelectric Cooler ◽  
Control Performance ◽  
Accurate Temperature ◽  
Wireless Module ◽  
And Control ◽  
Accurate Temperature Control

Aiming to solve the problems of inaccuracy in temperature control and the slow reaction in condensing system in the automated distillation analyzer, an approach which combining electrical fan and thermoelectric cooler was put forward, using STM32 as the control unit; accurate temperature control during the distillation process was realized, data collection and processing can be completed by the control unit, and the wireless module can accomplish communication and control the analyzer under the instructions of computer. With this temperature control method, the automation and test accuracy of distillation analyzer can be enhanced, thus ensuring better ratio of performance-to-price and control performance.

Thermal Analysis of a Microfluidic Preconcentrator for Portable Micro Gas Analysis Systems

2009 ◽  
Author(s):  
Z. Jay Cao ◽  
Aaron J. Knobloch ◽  
Wei-Cheng Tian ◽  
Stacey J. Kennerly ◽  
Nannan Chen ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Gas Chromatography ◽  
Power Consumption ◽  
Temperature Control ◽  
Metal Organic Framework ◽  
Gas Analysis ◽  
Design Changes ◽  
Accurate Temperature ◽  
Metal Organic ◽  
Accurate Temperature Control

Two key challenges to portable gas chromatography are reducing preconcentrator power consumption and accurate temperature control of adsorbent. This paper presents the results of thermal modeling performed to optimize a microfabricated preconcentrator based on a silicon microhotplate and utilizing Metal Organic Framework (MOF) adsorbents. From this modeling, two design changes are presented that reduce the power consumption by 1.5 W and reduce temperature variation across the microhotplate by 50%.

A torsional creep instrument and a torsional pendulum, both with accurate temperature control

1969 ◽  
Vol 8 (2) ◽  
pp. 130-133 ◽  
Author(s):  
C. W. van der Wal ◽  
C. J. Nederveen ◽  
G. A. Schwippert
Keyword(s):  
Temperature Control ◽  
Accurate Temperature ◽  
Torsional Pendulum ◽  
Accurate Temperature Control
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