scholarly journals THERMOCOUPLE LIQUID LEVEL INDICATOR USED ON COLD TRAP STANDS

1958 ◽  
Author(s):  
R.D. Peak
Keyword(s):  
Liquid Level ◽  
Cold Trap ◽  
Level Indicator

A liquid level indicator

Cryogenics ◽  
1968 ◽  
Vol 8 (5) ◽  
pp. 321-322 ◽  
Author(s):  
M.V. Zinov'ev ◽  
V.K. Chernitskii
Keyword(s):  
Liquid Level ◽  
Level Indicator

Electric liquid level indicator

1938 ◽  
Vol 15 (3) ◽  
pp. 107-108
Author(s):  
Shell Refineries, Ltd.
Keyword(s):  
Liquid Level ◽  
Level Indicator

A liquid level indicator

1985 ◽  
Vol 28 (2) ◽  
pp. 168-170
Author(s):  
D. Ya. Gershman
Keyword(s):  
Liquid Level ◽  
Level Indicator

Cryogenic liquid level indicator based on t.e.m.f. of high-temperature superconductors

1991 ◽  
Vol 27 (1-3) ◽  
pp. 671-675 ◽  
Author(s):  
A. Uusima¨ki ◽  
T. Porjesz ◽  
E. Immonen ◽  
I. Kirschner ◽  
S. Leppa¨vuori
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Cryogenic Liquid ◽  
Liquid Level ◽  
Level Indicator

Liquid Level Indicator for Condensed Gases at Low Temperatures

1954 ◽  
Vol 25 (2) ◽  
pp. 111-114 ◽  
Author(s):  
W. E. Williams ◽  
E. Maxwell
Keyword(s):  
Low Temperatures ◽  
Liquid Level ◽  
Level Indicator

Development of a Robust Scrubber Level Controller

2021 ◽  
Author(s):  
Carolyn M. Day ◽  
Griffin C. Beck ◽  
Scott A. Schubring
Keyword(s):  
Control System ◽  
Natural Gas ◽  
Control Systems ◽  
Control Valve ◽  
Cost Effective ◽  
Liquid Level ◽  
Level Control ◽  
Level Indicator ◽  
System Failures ◽  
Level Control System

Abstract Gas-liquid scrubbers rely on level control systems (generally consisting of a level indicator, a level controller, and a pneumatic control valve for liquid release) to maintain an appropriate liquid level within the vessel. Scrubbers are often upstream of turbomachinery and failures at the scrubber can cause liquid ingestion or downtime. In natural gas service, these control systems are subject to harsh environments due to the influx of liquid slugs, high-velocity gases, corrosive fluids, vibrations, and a chaotic gas-liquid interface. In these severe conditions, level control system failures are commonplace and lead to safety and environmental hazards, equipment damage, and lost production. A need exists to augment or replace the typical liquid level control system with an alternative solution that is cost-effective, robust, and can operate reliably in the harsh natural gas environment. A project investigated failures related to scrubber level control systems, identified improvements to these systems, developed a prototype level controller, and tested the prototype controller and a variety of commercially available controllers at various conditions that emulated certain field conditions. The results of these tests gave insight into what type of controller may be best suited to the tested conditions and what controller options should be pursued further.

An Ultra-Sensitive Liquid-Level Indicator Based on an Etched Chirped-Fiber Bragg Grating

2016 ◽  
Vol 28 (3) ◽  
pp. 268-271 ◽  
Author(s):  
Hung-Ying Chang ◽  
Yu-Chung Chang ◽  
Hao-Jan Sheng ◽  
Ming-Yue Fu ◽  
Wen-Fung Liu ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Liquid Level ◽  
Bragg Grating ◽  
Level Indicator ◽  
Chirped Fiber Bragg Grating

A Sensitive Electronic Liquid Level Indicator for Condensed Gases

1960 ◽  
pp. 154-155
Author(s):  
D. W. Braudaway ◽  
S. B. Schwartz ◽  
J. W. Allen
Keyword(s):  
Liquid Level ◽  
Level Indicator

A Novel Fiber-Optic Liquid Level Sensor with Adjustable Light Path Based on Principle of Light Refraction

2010 ◽  
Vol 26-28 ◽  
pp. 573-578 ◽  
Author(s):  
Shi Wei Zhang ◽  
Wen Sheng Liang ◽  
Guo Zhao Ji
Keyword(s):  
Fiber Optic ◽  
Incident Light ◽  
Path Model ◽  
Liquid Level ◽  
Light Path ◽  
Light Refraction ◽  
Level Indicator ◽  
Factors Affecting ◽  
Level Sensor ◽  
Liquid Level Sensor

Considering the difficulty to precisely indicate the specified height for transparent or semitransparent thin liquid column, a novel fiber-optic liquid level sensor is reported which remarkably enhances the sensitivity by regulating the external light path based on the principle of light refraction. The structure and working principle of this sensor is introduced. A light path model is developed on the condition that the incident light ray obliquely penetrates the medium in the liquid level indicator. The formulae of deflection angle are deduced. Factors affecting the precision of the sensor are analyzed by means of an example. Finally the feasibility of this novel design is verified by experiments.

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