Pressure Switches
General Purpose Industrial Pressure/Vacuum Switches - Discontinued


General Purpose Industrial Switches, Pressure/Vacuum Ranges | PSW490

General Purpose Industrial Switches, Pressure/Vacuum Ranges

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  • Watertight, Corrosion-Resistant Case
  • Reliable in Harsh Environments


The PSW490 has been discontinued. Please see the PSW-100 SERIES as possible substitutes or contact our Pressure department.
OMEGA’s PSW490 Series of switches are designed to satisfy most industrial switch requirements. The actuators have been proven in more than 20 years of service worldwide. A Buna-N seal and SPDT switch is standard. Optional FKM or stainless steel seals extend media compatibility to most fluids, and either the hermetically sealed or dual SPDT switches will meet most switching applications.

Switch: snap action SPDT switch
Electrical: Std: 15 A @125/250/480 Vac, 1 /2 A @ 125 Vdc; 1 /4 A @ 250 Vdc; 6 A @ 30 Vdc Hermetically sealed: (suffix "-HS") 11 A @ 125/250 Vac, 5A @ 30 Vdc
Process Temperature Range: Buna-N: -20 to 65°C (-4 to 149°F),
FKM : -5 to 150°C ( 23 to 302°F),
Stainless Steel:-20 to 150°C (-4 to 302°F)
Repeatability: ±1% Full Range
Proof Pressure: 400% minimum
Deadband: Buna-N see "To Order"
FKM: multiply Buna-N by 1.4,
Stainless Steel: multiply Buna-N by 1.7
Enclosure: Epoxy-coated aluminum. Meets NEMA-3, -4, -4x, -13 and IP66 requirements
Process Connection: 1 /2 NPT Male, 1 /4 NPT Female combination
Electrical Connections: 3 /4 NPT entry, screw terminals internal
Wetted Parts: 316 SS, Buna-N
Dimensions: psi ranges: 144 H x 102 W x 59 mm D (5.7 x 4 x 2.3");
inH2O Ranges: W & D = 130 mm (5.1")
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