Honeywell Pressuretrol Controller, Manual Reset, 20 psi to 300 psi

Overview: High pressure limit switches. Features: Stainless steel diaphragm for use with steam, air, noncombustible gases and fluids non-corrosive to stainless steel. L4079W is for Oil Applications. Micro Switch snap-acting switches open automatically on pressure rise; must be manually reset. Mount using 1/4 in. NPT female fitting on diaphragm assembly or surface mount through back of case.