• 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.Honeywell Pressuretrol SPST 20-300# break on rise manual reset| Sensor Element | Stainless Steel diaphragm |
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| Overview | High pressure limit switches. |
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| Pipe Connections, Main or High Pressure | 1/4 in. NPT internal thread |
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| Maximum Sustained Operating Pressure (psi) | 350 psi |
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| Maximum Sustained Operating Pressure (kPa) | 2410 kPa |
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| Application | Provide limit control of steam, air, non-combustible gases or non-corrosive fluids |
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| Operating Range (psi) | 20 to 300 psi |
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| Maximum Ambient Temperature (F) | 150 F |
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| Operating Range (kPa) | 140 to 2070 kPa |
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| Mounting | 1/4 in. NPT internal thread or surface mount through back of case |
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| Maximum Ambient Temperature (C) | 66 C |
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| Switch Operation | Manual Reset |
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| Switching Action | SPST break on pressure rise |
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| Dimensions (in.) | 5 in. high x 4 1/2 in. wide x 3 1/2 in. deep. |
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| Dimensions (mm) | 127 mm high x 114 mm wide x 89 mm deep. |
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| Switch Contact Ratings (120 Vac) | 9.8 AFL, 58.8 ALR |
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| Switch Contact Ratings (240 Vac) | 4.9 AFL, 29.4 ALR |
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| Electrical Connections | Screw terminals |
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| Approvals, Underwriters Laboratories Inc | Listed: File No. MP466, Guide No. MBPR |
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| Approvals, Swiss RE (formerly IRI) | Acceptable |
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Product Family
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