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COMPACT SWITCHES FOR
HAZARDOUS LOCATIONS
PRESSURE/VACUUM RANGES
PSW495 Series
Vacuum to 3000 psi
Watertight Enclosure
Class I, Division 1 UL listed
Starts at
$
350
⻬ Watertight, Corrosion-
Resistant Case
⻬ CSA Listed Switches
⻬ Reliable in Harsh
Environments
⻬ Field Adjustable
OMEGA’s PSW495 series
switches are designed to satisfy
most industrial switch requirements.
The actuators have been proved
themselves in more than 20 years
of service worldwide. The selection
of seal materials and single or dual
SPDT hermetically sealed switches
meets most switching applications.
SPECIFICATIONS
Switch: CSA listed snap-action SPDT
Electrical:
Standard: Hermetically sealed: 11 A,
125/250 Vac; 5 A, 30 Vdc
Options: hermetically sealed gold
contacts: 1 A, 125 Vac; narrow
deadband: 5 A, 125/250 Vac
Process Temperature Range:
“B” - Buna-N: -18 to 66°C (0 to 150°F)
“V” - FKM: -7 to 149°C (20 to 300°F)
“S” - Stainless Steel Welded:
-18 to 93°C (0 to 200°F)
Repeatability: ±1% Full Range
Proof Pressure: the greater of
1000 psi or 400% range
Deadband:
Buna-N: see “To Order”
chart for approximate deadband
FKM: Multiply Buna-N by 1.4
Stainless Steel: Multiply Buna-N
by 1.7
Enclosure: Anodized aluminum body
Process Connection:
Electrical Connections:
fitting with #18 AWG 450 mm (18")
insulated wire leads
Wetted Parts: 316 SS + seal material
Ambient Temperature Limits:
-29 to 65°C (-20 to 150°F)
Dimensions: 156 H x 38 W x 38 mm D
(6.4 x 1.5 x 1.5")
Weight: approximately 0.6 kg (1.32 lb)
1
⁄2 FNPT
1
⁄2 NPT conduit
OPTIONAL
CONFIGURATIONS
Narrow Deadband Switches:
add suffix “-P”, $100
Dual SPDT Switches:
add suffix “-JJ”, $205
FKM Actuator Seal: (vacuum to 1000
psi ranges) replace “B” in model
number with “V”, add $12 for psi ranges
PTFE Actuator Seal: (vacuum to 1000
psi ranges) replace “B” in model
number with “T”, add $20 for psi ranges
Welded Stainless Steel Actuator
Seal: (psi ranges to 1000) replace “B”
in model number with “S”, $55
To Order (Specify Model Number)
NOMINAL PROOF APPROXIMATE
RANGE(1) MODEL NO. PRICE (PSI) DEADBAND(2)
STANDARD MODELS: Buna-N Seal, SINGLE 11 A Switch
30 inHg Vac PSW495B-30Vac $350 1000 1.0 to 8.0
30 psi PSW495B-30 350 1000 0.5 to 3.0
60 psi PSW495B-60 350 1000 0.5 to 4.0
100 psi PSW495B-100 350 1000 2.0 to 9.0
200 psi PSW495B-200 350 1000 3 to 17
400 psi PSW495B-400 350 1600 5 to 30
600 psi PSW495B-600 350 2400 10 to 45
1000 psi PSW495B-1K 350 4000 20 to 140
2000 psi PSW495B-2K* 350 12000 100 to 200
3000 psi PSW495B-3K* 350 12000 150 to 300
Supplied with O-ring sealed piston actuator rather than diaphragm sealed actuator
*
Comes complete with operator’s manual.
Notes: (1) Switches may generally be set between 15 and 100% of nominal range; exception
is stainless steel, whose limits are 20 to 100%. (2) Deadbands are for Buna-N in standard
units as referenced in the nominal range column. See specifications for approximate
deadbands of optional seals.
Ordering Example: PSW495T-100-JJ, PTFE diaphragm seal, range of 100 psi and dual
hermetically sealed 11 A switches, $350 + 20 + 205 = $575.
Recommended Reference Book: Hydraulics Field Manual, ME-1801, $65.
Visit omega.com/bobi for Additional Books
PSW495B-100,
$350, shown
smaller than
actual size.
MOST POPULAR MODELS HIGHLIGHTED!
H-49
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