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Making sight tubes easier to read


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What is the issue?
It can be very difficult to read a sight tube. Mounted near to tanks they tend to be situated in awkward places that are as often as not subject to poor lighting. Often the readings have to be taken from transparent fluids.

Why address this?
Keeping track of fuel and water availability is essential when running and provisioning a vessel. A good sight tube system is perhaps the most reliable indicator if it can be used.

How to address this?
Use the refracting property of liquids to make the fluid levels highly visible as presented in figure 1.

A series of diagonal lines behind a sight tube will be refracted to the horizontal behind the fluid marking the fluid level highly conspicuous.


With thanks to:
Michael Harpur, Yacht Obsession.



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