Many of the products and services we enjoy depend on sight glasses at some point in their creation. Sight glasses are used to observe process steps in a wide variety of industries, ranging from heavy-industry chemical plants to sleek pharmaceutical facilities. Whether for witnessing mixing, verifying flow, observing reactions, and documenting cleaning in material processing, mining, utilities, or food and beverage industries, the need for fool-proof process observation depends on sight glass windows, sight glass flow indicators, lights and allied products from L.J. Star.