Insulating Oil Level Monitoring System for Transformer Based on Liquid Level Sensor

2011 ◽  
Author(s):  
Jianqing Liao
Keyword(s):  
Monitoring System ◽  
Liquid Level ◽  
Insulating Oil ◽  
Level Sensor ◽  
Liquid Level Sensor ◽  
Level Monitoring

Studies on Effect of Corrosion for the Selection of Material of Self-Compensated Capacitive Type Liquid Level Sensor

2019 ◽  
Vol 895 ◽  
pp. 230-236
Author(s):  
C.S. Suresh Babu ◽  
Premila Manohar
Keyword(s):  
Visual Analysis ◽  
Threshold Level ◽  
Liquid Level ◽  
Corrosive Environment ◽  
Sem Images ◽  
Suitable Material ◽  
Level Sensor ◽  
Liquid Level Sensor ◽  
Level Monitoring ◽  
Selection Of

This work deals with the design of fringe capacitance based non-contact type liquid level sensor employing self-compensation feature. The existing capacitive type sensors require additional compensation to overcome the problem of various stray capacitances, specifically due to atmospheric corrosion. This paper emphasizes on the selection of suitable material to accomplish the self-compensation feature in corrosive environment. Rate of attack of corrosion is studied on Copper (Cu) and Aluminium (Al) samples under drizzling environment. Visual Analysis of SEM images of samples exposed for different durations reveal that Al protects itself from the corrosion. Further, performance evaluation of two sensor units with Cu and Al electrodes under the same drizzling environment beside the respective samples indicate that sensor with Al electrodes facilitates the feature of self-compensation in corrosive environment. Further, the sensor is interfaced with Siemens PLC-S200 for liquid threshold level monitoring.

scholarly journals Liquid level sensor based on dynamic Fabry–Perot interferometers in processed capillary fiber

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Pablo Roldán-Varona ◽  
Rosa Ana Pérez-Herrera ◽  
Luis Rodríguez-Cobo ◽  
Luis Reyes-González ◽  
Manuel López-Amo ◽  
...  
Keyword(s):  
Optical Fiber Sensor ◽  
Liquid Level ◽  
Hollow Core ◽  
Immiscible Liquids ◽  
Fabry Perot ◽  
Detection Mode ◽  
Level Sensor ◽  
Core Fiber ◽  
Liquid Level Sensor ◽  
Silica Capillary

AbstractIn this work, a novel optical fiber sensor capable of measuring both the liquid level and its refractive index is designed, manufactured and demonstrated through simulations and experimentally. For this, a silica capillary hollow-core fiber is used. The fiber, with a sensing length of 1.55 mm, has been processed with a femtosecond laser, so that it incorporates four holes in its structure. In this way, the liquid enters the air core, and it is possible to perform the sensing through the Fabry–Perot cavities that the liquid generates. The detection mode is in reflection. With a resolution of 4 μm (liquid level), it is in the state of the art of this type of sensor. The system is designed so that in the future it will be capable of measuring the level of immiscible liquids, that is, liquids that form stratified layers. It can be useful to determine the presence of impurities in tanks.

scholarly journals Light Path Model of Fiber Optic Liquid Level Sensor Considering Residual Liquid Film on the Wall

2015 ◽  
Vol 2015 ◽  
pp. 1-8
Author(s):  
Zhijun Zhang ◽  
Shiwei Zhang
Keyword(s):  
Liquid Film ◽  
Fiber Optic ◽  
Glass Tube ◽  
Path Model ◽  
Liquid Level ◽  
Residual Liquid ◽  
Light Refraction ◽  
Special Cases ◽  
Level Sensor ◽  
Liquid Level Sensor

The working principle of the refractive-type fiber optic liquid level sensor is analyzed in detail based on the light refraction principle. The optic path models are developed in consideration of common simplification and the residual liquid film on the glass tube wall. The calculating formulae for the model are derived, constraint conditions are obtained, influencing factors are discussed, and the scopes and skills of application are analyzed through instance simulations. The research results are useful in directing the correct usage of the fiber optic liquid level sensor, especially in special cases, such as those involving viscous liquid in the glass tube monitoring.

scholarly journals A plastic fiber optic liquid level sensor

2004 ◽  
Author(s):  
S. Vargas ◽  
Carmen Vazquez ◽  
Ana B. Gonzalo ◽  
Jose M. Pena
Keyword(s):  
Fiber Optic ◽  
Liquid Level ◽  
Level Sensor ◽  
Liquid Level Sensor

Simulation of fiber optic liquid level sensor demodulation system

2013 ◽  
Author(s):  
Cong-qin Yi ◽  
Yun Luo ◽  
Zheng-ping Zhang
Keyword(s):  
Fiber Optic ◽  
Liquid Level ◽  
Level Sensor ◽  
Liquid Level Sensor

Optical liquid level sensor based on cladding-mode resonance of specialty double-cladding fiber

2009 ◽  
Author(s):  
Huanhuan Liu ◽  
Fufei Pang ◽  
Na Chen ◽  
Zhenyi Chen ◽  
Tingyun Wang
Keyword(s):  
Liquid Level ◽  
Level Sensor ◽  
Cladding Mode ◽  
Liquid Level Sensor

Optical-fiber discrete liquid-level sensor for liquid nitrogen

2005 ◽  
Author(s):  
Sergei N. Khotiaintsev ◽  
Katya Romo-Medrano ◽  
Vladimir A. Svirid
Keyword(s):  
Optical Fiber ◽  
Liquid Nitrogen ◽  
Liquid Level ◽  
Level Sensor ◽  
Liquid Level Sensor

scholarly journals Liquid level sensor based on CMFTIR effect in polymer optical fiber

2016 ◽  
Vol 6 (4) ◽  
pp. 312-317 ◽  
Author(s):  
Yulong Hou ◽  
Wenyi Liu ◽  
Huixin Zhang ◽  
Shan Su ◽  
Jia Liu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Liquid Level ◽  
Polymer Optical Fiber ◽  
Level Sensor ◽  
Liquid Level Sensor
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