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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.


Product Specifications

Application: Provide limit control of steam, air, non-combustible gases or non-corrosive fluids

Dimensions (in.):  5 in. high x 4 1/2 in. wide x 3 1/2 in. deep.

Dimensions (mm):  127 mm high x 114 mm wide x 89 mm deep.

Mounting:  1/4 in. NPT internal thread or surface mount through back of case

Approvals, Underwriters Laboratories Inc.:  Listed: File No. MP466, Guide No. MBPR

Electrical Connections:  Screw terminals

Temperature Ratings (C):  66 C - Maximum Ambient

Temperature Ratings (F):  150 F - Maximum Ambient

Contact Rating:  120 Vac Switch Contact-- 9.8 AFL, 58.8 ALR; 240 Vac Switch Contact-- 4.9 AFL, 29.4 ALR

Approvals, Swiss RE:  Acceptable

Sensor Element:  Stainless Steel diaphragm

Operating Range (psi):  2 to 15 psi; 25 psi - Maximum Sustained

Operating Range (kPa):  14 to 103 kPa; 172 kPa - Maximum Sustained

Switch Operation:  Manual Reset

Switching Action:  SPST break on pressure rise

Pipe Connection:  Main or High Pressure--1/4 in. NPT internal thread
More Information
Brand Honeywell
Manufacturer # L4079B1033