Abstract
For nearly a decade, liquid level sensors have been on the market as white food or beverage products, manufacturing, medical, residential, farming, automotive, aerospace, defense and liquid leak detection or level measurement devices. The nano material-resistive sensor based on reduced graphene oxide is highly sensitive and highly reactive to level measurement. This rGO liquid level sensor was developed, and using screen printing process, nano material film is printed on Al2O3 substratum. For safety purposes the sensor film was coated with Parylene-C. The rGO-based nano material was synthesized using Modified Hummer process. A linear relationship between the rGO film’s resistances was observed due to the change in liquid level, which implies fast detection and therefore calibration. With its fast and cost-effective manufacturing process, this liquid level sensor has considerable potential in industries where liquid level sensing is mandatory e.g. pharmaceutical also, space, automotive and even for liquid storage, liquid levels using cryogenic fluids of H2O icewater, LCO2, LN2, LH2, LOX and LHe.
Highlights
A level sensor is an instrument used to assess the depth or quantity of sediment or other substances that flow through an open or closed structure
The nano material-resistive sensor based on reduced graphene oxide is highly sensitive and highly reactive to level measurement
This reduced Graphene Oxide (rGO) liquid level sensor was developed, and using screen printing process, nano material film is printed on Al2O3 substratum
Summary
A level sensor is an instrument used to assess the depth or quantity of sediment or other substances that flow through an open or closed structure. The importance of proper level measurement within the process control industry contributes to the development of various detection technologies at different levels Each of these technologies may be used in conjunction with the monitoring process (liquid / dense), storage form (open / closed tanks), installation simplification, cost, maintenance requirements etc., Index / control measurements, point level / continuous detection, etc. Because of their high precision, pressure sensors have been commonly used to calculate the fluid levels These are easy to use, mount and work under various conditions and in a variety of applications. Pressure sensors can be categorized by taking into account the level of pressure they can measure, the level of operating temperature or the amount of pressure they are measuring It is a kind of indirect, non-contact level measurement with limited range which can be used in open and closed tanks for level measurement. The level sensor employs a basic principle of change in sensing film resistance when exposed to the Specific Cryogenic liquids for level measurement
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