Pressuretrol, Manual Reset, 20 psi to 300 psi


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Honeywell pressuretrol controller with a range of 20-300 psi, manual reset, and a 1/4″ NPT female connection to siphon loop. Pressuretrol limit controls are high pressure limit switches which break electrical circuits when pressure rises to a preset value. L4079B models have one SPST switch that breaks on rise.

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SKU: CON-PTROL-L4079B1066 Category: Tags:

High pressure limit switches.


  • 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.






Manufacturer ID


Operating Range

20 to 300

Switch Action

SPST break on pressure rise

Max Pressure

350 psi

Switch Operation

Manual Reset

Product Data

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