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.