Pressure Switches General Purpose Industrial Pressure/Vacuum Switches - Discontinued
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.
SPECIFICATIONS 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")
We noticed you are from the US. Visit your local site for regional offers and live support.