Honeywell proportional pressuretrol controller with a range of 10-300 psi, non-adjustable, one potentiometer, and a 1/4″ NPT female connection to siphon loop. L91 proportioning pressuretrol controllers provide direct control of modulating motors or valves used on automatic burners or steam heating systems.
Honeywell pressuretrol controller with a range of 5-50 psi (adjustable 6-14 psi differential range), and a 1/4″ NPT female connection to siphon loop. This pressuretrol features a SPDT switch that can make or break on pressure rise. L404F pressuretrol controllers provide operating control with automatic limit protection for pressure systems of up to 300 psi. Controllers may be used with steam, air, or noncombustible gases, or fluids noncorrosive to the pressure sensing element.
**This product is obsolete **
Line voltage pressure controller that provides automatic operating control, automatic limit protection, manual reset limit protection, and 4-20ma modulating firing rate control for pressure systems up to 300 psi.