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GENERAL PURPOSE PRESSURE SWITCHES
IN NEMA 4X (IP66) ENCLOSURES
Vacuum to 3000 psi
PSW-100 Series
Double Pole
Double Throw:
10 A 125/250 Vac
resistive
Enclosure: Die-cast
aluminum (max 0.6%
copper); epoxy-coated
blue enclosure,
U Ranges from 0.5 inH2O
to 3000 psi
U SPDT or DPDT Switches
U Adjustment Lock
U Safe, Easy Wiring Access
OMEGA’s affordable, general
purpose pressure switches offer
distinct advantages over most
similar-style switches, including
DPDT or adjustable deadband
switches, as well as a wide
selection of adjustable ranges from
0.5 inH2O to 3000 psi.
gasketed, complies
with NEMA 4X (IP66)
Weight: Approximately
0.9 kg (2 lb)
Electrical Connection:
1
⁄2 NPT and two 7⁄8"
diameter knockouts
Pressure Connection:
See “To Order” on next page
Dimensions:
191 max H x 101 W x 60 mm D
(7.5 x 4 x 2.3")
SPECIFICATIONS
Approval: UL listed
Storage Temperature: -55 to 70°C
(-67 to 158°F)
Process Temperature:
Stainless Steel:
-55 to 205°C (-67 to 401°F)
Phosphor Bronze:
-40 to 150°C (-40 to 302°F)
Buna-N: -25 to 95°C (-13 to 203°F)
Ambient Temperature: -40 to 70°C
(-40 to 158°F), except models PSW-107
to PSW-117 and PSW-134 to PSW-139:
-20 to 70°C (-4 to 158°F);
setpoint typically shifts less than 1%
of range for a 30°C (54°F) ambient
temperature change
Shock: Setpoint repeats after 15 g,
10 ms duration
Vibration: Setpoint repeats after 2.5 g,
5 to 500 H
Setpoint Repeatability: All models
±1% of adjustable range, except models
PSW-118 to PSW-125 and PSW-132 to
PSW-133, which are ±1.5%
Switch Output: One SPDT or DPDT
switch can be wired “normally open”
or “normally closed”
Electrical Rating: Standard 15 A
125/250/480 Vac resistive
External Manual Reset: 15 A
125/250 Vac resistive
z
PSW-114, shown
smaller than
actual size.
Long-Life
Switch
Gasketed
Cover
VibrationResistant
Setpoint
and Scale
Rugged NEMA 4X
(IP66) Enclosure
H-25
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GENERAL PURPOSE PRESSURE SWITCHES
To Order
ADJUSTABLE RANGE
DEADBAND
MODEL NO.
BUNA-N DIAPHRAGM, O-RING AND
PSW-107
PSW-108
PSW-109
PSW-110
PSW-111
PSW-112
PSW-113
PSW-114
PSW-115
PSW-116
PSW-117
BUNA-N DIAPHRAGM, O-RING AND
PSW-134
PSW-135
PSW-136
PSW-137
PSW-138
PSW-139
316 SS DIAPHRAGM AND
PSW-104
PSW-105
PSW-118
PSW-120
PSW-121
PSW-123
PSW-124
PSW-125
PHOSPHOR BRONZE BELLOWS AND
PSW-127
PSW-128
PSW-129
316 SS BELLOWS AND
PSW-130
PSW-131
PSW-132
303 SS PISTON, BUNA N O-RING AND
PSW-133
Note: The use of metallic diaphragms where higher pressures, shock or heavy cycling is expected should be avoided. When choosing a
*
pressure range, it is recommended that the switch operate in the middle 80% of its adjustable range. Switching may not be accurate in the lower
and upper 10% of the range.
Switches come complete with operator’s manual.
Ordering Example: PSW-115, Buna-N diaphragm,
STANDARD METRIC
1
⁄4 FNPT NICKEL-PLATED BRASS PRESSURE CONNECTION
STANDARD UNITS
1.5 to 30 psi 0.1 to 2 bar 1 to 2 psi 600 psi 15 A SPDT —
3 to 100 psi 0.2 to 6.9 bar 1 to 4 psi 600 psi 15 A SPDT —
3 to 100 psi 0.2 to 6.9 bar — 600 psi 15 A SPDT External
3 to 100 psi 0.2 to 6.9 bar 11.3 Typ. 600 psi 10 A DPDT
3 to 100 psi 0.2 to 6.9 bar 3 to 7 psi 600 psi 15 A SPDT Adjustable
9 to 300 psi 0.7 to 20.7 bar 1 to 5 psi 600 psi 15 A SPDT —
9 to 300 psi 0.7 to 20.7 bar 4 to 11 psi 600 psi 15 A SPDT Adjustable
15 to 500 psi 1 to 34.5 bar 2 to 8 psi 2500 psi 15 A SPDT —
15 to 500 psi 1 to 34.5 bar 5 to 12 psi 2500 psi 15 A SPDT Adjustable
15 to 500 psi 1 to 34.5 bar — 2500 psi 15 A SPDT External
30 to 1000 psi 2 to 69 bar 3 to 20 psi 2500 psi 15 A SPDT —
1
⁄2 FNPT ALUMINUM PRESSURE CONNECTION
300 inWC vac to 0 inWC
10 inWC vac to 10 inWC
50 inWC vac to 50 inWC
0.5 to 5 inWC
2.5 to 50 inWC
10 to 250 inWC
1
⁄2 FNPT PRESSURE CONNECTION
747.24 to 0 mbar
-24.91 to 24.91 mbar
0.2 to 8 inWC 100 psi 15 A SPDT —
0.1 to 0.6 inWC 100 psi 15 A SPDT —
-124.54 to 124.54 mbar0.1 to 3.0 inWC 100 psi 15 A SPDT —
1.25 to 12.45 mbar
6.23 to 124.54 mbar
24.91 to 622.70 mbar
0.1 to 0.3 inWC 100 psi 15 A SPDT —
0.1 to 0.8 inWC 100 psi 15 A SPDT —
0.1 to 6.0 inWC 100 psi 15 A SPDT —
1 to 20 psi 70 mbar to 1.4 bar 0.1 to 1 psi 500 psi 15 A SPDT —
2 to 50 psi 140 mbar to 3.4 bar 0.1 to 1.5 psi 500 psi 15 A SPDT —
5 to 30 psi 0.4 to 2 bar 1 to 3 psi 2500 psi 15 A SPDT —
10 to 100 psi 0.7 to 6.9 bar 1 to 8 psi 2500 psi 15 A SPDT —
15 to 300 psi 1 to 20.7 bar 3 to 18. psi 2500 psi 15 A SPDT —
15 to 300 psi 1 to 20.7 bar 3 to 18 psi 2500 psi 15 A SPDT Adjustable
20 to 500 psi 1.4 to 34.5 bar 4 to 30 psi 2500 psi 15 A SPDT —
80 to 1700 psi 5.5 to 117 bar 5 to 120 psi 2500 psi 15 A SPDT —
1
⁄4 FNPT BRASS PRESSURE CONNECTION
30 inHg vac to 0
30 inHg vac to 0
4 to 200 psi
1
⁄4 FNPT PRESSURE CONNECTION
-1 to 0 bar 1 to 2 inHg 0 psi 15 A SPDT —
-1 to 0 bar 3 to 6.5 inHg 0 psi 10 A DPDT
0.3 to 13.7 bar 1 to 4 psi 250 psi 15 A SPDT —
15 to 200 psi 1 to 13.7 bar 1 to 3 psi 250 psi 15 A SPDT —
25 to 500 psi 1.8 to 34.5 bar 1.5 to 5 psi 575 psi 15 A SPDT —
100 to 1700 psi 6.9 to 11.7 bar 9 to 40 psi 2500 psi 15 A SPDT —
1
⁄4 FNPT SS PRESSURE CONNECTION
125 to 3000 psi 8.6 to 206 bar 40 to 250 psi 10000 psi 15 A SPDT —
1
brass FNPT thread, range of 50 to 500 psi and adjustable deadband.
⁄
4
PROOF
PRESSURE
SWITCH
ADDED
FEATURE
Manual
Reset
DPDT Switch
Deadband
Deadband
Deadband
Manual
Reset
Deadband
DPDT Switch
PRESSURE SWITCHES
H
H-26
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