Honeywell L4079B1041 pressuretrol controller with a range of 10-150 psi, manual reset, and a 1/4" NPT female connection to siphon loop. L4079B1041 pressuretrol limit controls are high pressure limit switches which break electrical circuits when pressure rises to a preset value.

Use with steam, air, noncombustible gases, or fluids non-corrosive to pressure sensing element.
Models have snap-acting switching to open or close a circuit on pressure rise.
Have adjustable differentials.
Adjustments are made by screws on top of case.
Honeywell L4079B Submittal Sheet