Level sensors have been a part of manufacturing processes for several decades, in industries as diverse as food and beverage, semiconductors, and pharmaceutical. However, equipment manufacturers and users may be surprised at both the breadth and sophistication of level sensing
alternatives currently available.
Measurements and actions that used to require large, mechanical, and expensive devices can now be performed using advanced, highly versatile technologies that are also durable, precise, and easy to implement. What’s more, a variety of level sensing technology options work well with what have traditionally been challenging substances such as highly viscous fluids and/or fluids that coat (e.g., molasses, glue, ink) and foam (beer, pulp, hydraulic fluid, soap).
Some users may question the need for such technology—or any level sensing device, for that matter—arguing that existing, “tried-and-true” methods are well-suited for the basic nature of most level sensing tasks. But today’s manufacturing environment is hardly that simple. Given the increasingly competitive nature of the marketplace, plus the ongoing drive to minimize inefficiencies and waste, no operation can afford  processes that are merely “close enough.” Dependability is also paramount if caustic or otherwise hazardous materials are involved.
In other words, level sensing is like any other part of the manufacturing process; it has to be precise, reliable, and cost-effective.

SICK (2014) 8 Most Common Level Sensing Methods

SICK (2014) 8 Most Common Level Sensing Methods
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