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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 #Maximum Sustained Operating Pressure (kPa)Maximum Sustained Operating Pressure (psi)Operating Pressure Range (psi)(kPa)Switching Action
L4079A1035172 kPa25 psi2 to 15 psi14 to 103 kPaSPST (two) break simultaneously on pressure rise
L4079A10501551 kPa225 psi10 to 150 psi69 to 1034 kPaSPST (two) break simultaneously on pressure rise
L4079B1033172 kPa25 psi2 to 15 psi14 to 103 kPaSPST break on pressure rise
L4079B10411550 kPa225 psi10 to 150 psi70 to 1035 kPaSPST break on pressure rise
L4079B1058590 kPa85 psi5 to 50 psi35 to 350 kPaSPST break on pressure rise
L4079B10662410 kPa350 psi20 to 300 psi140 to 2070 kPaSPST break on pressure rise
L4079W1000590 kPa225 psi10 to 150 psi35 to 350 kPaSPST break on pressure rise - Oil Applications
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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