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Honeywell L4079 Pressuretrol® Limit Controllers

Pressuretrol® Limit Controllers
L4079

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.

Select a link under the "item" tab below to order.

Cat #Operating Pressure Range (psi)Switching Action(kPa)Maximum Sustained Operating Pressure (psi)Maximum Sustained Operating Pressure (kPa)
L4079A10352 to 15 psiSPST (two) break simultaneously on pressure rise14 to 103 kPa25 psi172 kPa
L4079A105010 to 150 psiSPST (two) break simultaneously on pressure rise69 to 1034 kPa225 psi1551 kPa
L4079B10332 to 15 psiSPST break on pressure rise14 to 103 kPa25 psi172 kPa
L4079B104110 to 150 psiSPST break on pressure rise70 to 1035 kPa225 psi1550 kPa
L4079B10585 to 50 psiSPST break on pressure rise35 to 350 kPa85 psi590 kPa
L4079B106620 to 300 psiSPST break on pressure rise140 to 2070 kPa350 psi2410 kPa
L4079W100010 to 150 psiSPST break on pressure rise - Oil Applications35 to 350 kPa225 psi590 kPa
Application Provide limit control of steam, air, non-combustible gases or non-corrosive fluids
Mounting 1/4 in. NPT internal thread or surface mount through back of case
Pipe Connections, Main or High Pressure 1/4 in. NPT internal thread
Electrical Connections Screw terminals
Sensor Element Stainless Steel diaphragm
Switch Operation Manual Reset
Switch Contact Ratings AFL, 58.8 ALR (120 Vac); 4.9 AFL, 29.4
ALR (240 Vac)
Maximum Ambient Temperature 150 F (66 C)
Approvals Underwriters Laboratories Inc. Listed: File No. MP466, Guide No. MBPR


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