Omega Products PSW-301 User Manual
NEMA 4X (IP66)PRESSURE SWITCH
FOR HARSH OR CORROSIVE ENVIRONMENTS
PSW-300 Series
Vacuum to 3000 psi
Starts at
$
280
PSW-307, $280, shown
smaller than actual size.
3
⁄4 NPT
Conduct
Connection
⻬ Low Pressure Ranges:
-30 inHg Vacuum to
150 inH2O
⻬ High Pressure Ranges:
15 to 3000 psi
⻬ Buna-N or 316 SS
Diaphragm
⻬ 10 A SPDT Switch
⻬ Tamper/Vibration-
Resistant Setpoint
Adjustment 20 to
100% of Range
⻬ Fixed or Adjustable
Deadband
Ideal for use in harsh and corrosive
environments, the PSW-300 Series
pressure switches feature stainless
steel or Buna-N diaphragm-sealed
pistons or diaphragm actuators that
provide repeatability of ±1% of
range. Standard design allows easy
access to switches. For versatility,
single setpoint with fixed deadband,
single setpoint with adjustable
deadband, or dual, independently
adjustable setpoints can be chosen.
SPECIFICATIONS
Approvals: UL listed, CSA certified
Storage Temp: -29 to 66°C (-20 to 150°F)
Ambient Temp Limits: -29 to 66°C
(-20 to 150°F); setpoint typically shifts
+1% of range per 28°C (50°F) of
temperature change.
Enclosure: NEMA 4X (IP66)
and corrosion resistant
Setpoint Repeatability: ±1% of range
Switch Output: 1 or 2 SPDT switches
can be wired “normally open” or
“normally closed”
Electrical Rating:
10 A: 125/250 Vac
0.5 A: 125 Vdc
0.25 A: 250 Vdc
15 A: 125/250 Vac
Enclosure: Epoxy-coated
aluminum, gasketed
Weight: 0.9 kg (2 lb)
Electrical Connection:
3
⁄4 FNPT
Pressure Connection:
1
⁄4 FNPT; 1⁄2 NPT male for
vacuum to 600 psi;
1
⁄4 FNPT for 1000 and 3000 psi
Connection Material:
Vac through inH
ranges: carbon steel;
all psi ranges: 316 SS
Dimensions:
153 H x 105 W mm
(6 x 4.125"); 95 mm D (3.75")
for psi units; 114 mm D (4.5")
for inH
O units
2
Diffe
dels Available Visit
Mo
e
om
0
2
rential Pressure
ga.com/psw-351
Screw Terminal
Connections
Setpoint
Adjustment
H-21
Corrosion
Resistant
NEMA 4X
(IP66)
Enclosure
Wiring
Diagram
Watertight
Neoprene
Gasket
Easy-to-Read
Setpoint Scale
a
H-3
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PRESSURE SWITCHES
ACTUATOR MATERIAL OPTIONS
“-V” FKM $55
“-SS” Stainless Steel 55
“-M” Monel
(psi ranges only)
®
(psi ranges only)
120
PSW-307, $280, shown
smaller than actual size.
MOST POPULAR MODELS HIGHLIGHTED!
To Order (Specify Model Number)
ADJUSTABLE RANGE
MODEL NO. PRICE
FNPT SINGLE SETPOINT, ADJUSTABLE DEADBAND, BUNA-N DIAPHRAGM, O-RING,
PSW-301 $300 -6 to -30 inHg vac -20 to -100 kPa 6 to 24 250 psi 10 A SPDT
PSW-302 315 6 to 30 inH2O 1.5 to 7.5 kPa 4 to 27 20 psi 10 A SPDT
PSW-303 315 12 to 60 inH2O 3 to 15 kPa 5 to 54 20 psi 10 A SPDT
PSW-304 315 30 to 150 inH2O 7.4 to 37 kPa 18 to 135 20 psi 10 A SPDT
PSW-305 280 3 to 15 psi 20 to 100 kPa 2.5 to 13 500 psi 10 A SPDT
PSW-306 280 6 to 30 psi 40 to 200 kPa 3 to 18 500 psi 10 A SPDT
PSW-307 280 20 to 100 psi 140 to 700 kPa 10 to 90 1000 psi 10 A SPDT
PSW-308 280 40 to 200 psi 280 to 1400 kPa 18 to 180 1000 psi 10 A SPDT
PSW-309 280 80 to 400 psi 0 .56 to 2.8 MPa 45 to 360 2400 psi 10 A SPDT
PSW-310 330 200 to 1000 psi 1.4 to 7 MPa 160 to 900 12,000 psi 10 A SPDT
PSW-311 330 600 to 3000 psi 4.2 to 21 MPa 400 to 2600 12,000 psi 10 A SPDT
F
NPT DUAL SETPOINT, FIXED DEADBAND, BUNA-N DIAPHRAGM, O-RING,
PSW-321 $330 -6 to -30 inHg vac - 20 to -100 kPa 0.7 to 1.4 250 psi Two 15 A SPDT
PSW-322 345 6 to 30 inH2O 1.5 to 7.5 kPa 0.7 to 1.4 20 psi Two 15 A SPDT
PSW-323 345 12 to 60 inH2O 3 to 15 kPa 0.7 to 1.8 20 psi Two 15 A SPDT
PSW-324 345 30 to 150 inH2O 7.4 to 37 kPa 2.1 to 4.2 20 psi Two 15 A SPDT
PSW-325 305 3 to 15 psi 20 to 100 kPa 0.7 to 1.4 500 psi Two 15 A SPDT
PSW-326 305 6 to 30 psi 40 to 200 kPa 0.7 to 2.1 500 psi Two 15 A SPDT
PSW-327 305 20 to 100 psi 140 to 700 kPa 1.4 to 3.5 1000 psi Two15 A SPDT
PSW-328 305 40 to 200 psi 280 to 1400 kPa 1.4 to 5.6 1000 psi Two 15 A SPDT
PSW-329 305 80 to 400 psi 0.56 to 2.8 MPa 6 to 11 2400 psi Two 15 A SPDT
PSW-330 380 200 to 1000 psi 1.4 to 7 MPa 10 to 42 12,000 psi Two 15 A SPDT
PSW-331 380 600 to 3000 psi 4.2 to 21 MPa 42 to 98 12,000 psi Two 15 A SPDT
F
NPT DUAL SETPOINT, FIXED DEADBAND, 316 SS DIAPHRAGM,
PSW-345 $360 3 to 15 psi 20 to100 kPa 0.7 to 1.4 500 psi Two 15 A SPDT
PSW-346 360 6 to 30 psi 40 to 200 kPa 1.7 to 2.8 500 psi Two 15 A SPDT
PSW-347 360 20 to 100 psi 140 to 700 kPa 2.8 to 5.6 1000 psi Two 15 A SPDT
PSW-348 360 40 to 200 psi 280 to 1400 kPa 4.2 to 11.2 1000 psi Two 15 A SPDT
Comes complete with operator’s manual.
Pressure Switch Options (Add Suffix to Model Number):
Hermetically sealed 5 A 125/250 Vac switch for extra protection in severe environments “-P”, single setpoint, $100. “-PP”, dual setpoint, $205.
Ordering Example: PSW-345-PP, dual hermetically sealed switches, range of 3 to 15 psi, $360 + 205 = $565.
STANDARD METRIC STANDARD
H-22
DEADBAND PROOF
UNITS
1
⁄
FNPT CONNECTION
4
1
⁄
FNPT CONNECTION
4
PRESSURE SWITCH
1
⁄
F
NPT CONNECTION
4
H
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