The Krueger 16N580 is a magnetic level gauge designed for use with steam boilers, hot water heating systems, and process tanks to indicate liquid level. This level gauge has a 316 stainless steel chamber with mica viewing windows and an aluminum case. It is made in the USA and is adjustable to fit tank diameters from 3-1/2 to 5-1/2 inches. The level gauge comes with Teflon packing nuts and gaskets. It indicates liquid level through a magnetic coupling that moves an indicator float up and down outside the chamber as the liquid level changes inside the chamber. This provides a remote liquid level indication without electronics.