Corrosion Resistant Stainless Steel Monitor VARUN-443 is a low profile monitor with durable manual control for fixed installation as well as trailer mounted unit. Monitors are generally used to protect flammable liquid storage tanks, loading racks, sea dykes and many other industrial applications. The monitor has several design features that provide ease of operation, minimal maintenance, and resistance to typically corrosive environments. Monitors are used with constant flow or variable flow nozzles. Varun-443 is UL listed.