Description
The Honeywell L4079B1033 is a rugged, manual-reset pressure limit switch—commonly used to protect steam systems, air systems, and HVAC equipment from overpressure. Featuring a 2 to 15 psi operating range, a stainless-steel diaphragm, and a snap-acting SPST switch that breaks the circuit on pressure rise, it ensures dependable, hands-on safety and control.
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.











