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HEAVY-DUTY DIVISION 1
INDUSTRIAL PRESSURE SWITCHES
PSW-400 Series
Vacuum to 3000 psi
Starts at
$
495
⻬ Dual-Chamber Design
Isolates Electronics from
Pressure Media
⻬ Heavy-Duty Cast
Aluminum with
Corrosion-Resistant
Epoxy Coating
⻬ Meets NEMA 7 and 9
Classifications
⻬ Gasketed Covers
⻬ Tamper/Vibration-
Resistant Setpoint
Adjustment
⻬ Surface and Mounting
Bracket Standard
Designed for applications in
hazardous atmospheres, PSW-400
Series pressure switches offer
complete reliability thanks to a
rugged, die-cast aluminum
enclosure with waterproof gaskets
and 2 separate chambers for
electronics and actuator. Single or
dual setpoints are available, with all
critical parts made of stainless steel.
In addition, the PSW-400 Series
employs vibration-resistant setpoints
and a calibrated scale.
Definition of Division 1:
Locations where hazardous material
concentrations exist continuously,
intermittently, or periodically under
normal operating conditions.
SPECIFICATIONS
Approval: UL listed; Class I, Divisions 1
and 2, Groups B, C, D; Class II,
Divisions 1 and 2, Groups E, F, G;
CSA certified
Storage Temp: -29 to 65°C
(-20 to 150°F)
Ambient Temp Limits: -29 to 65°C
(-20 to 150°F)
Process Temp Limits:
Stainless Steel: 149°C (300°F)
Buna-N: 65°C (150°F)
PSW-405, $495,
3 to 15 psi range,
shown smaller
than actual size.
Mounting
bracket
included
Enclosure Classification:
NEMA 7 and 9 hazardous location,
explosion proof, dust-ignition proof
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
Optional Hermetically Sealed 5 A:
125/250 Vac
Enclosure: Dual-chamber, epoxy-coated
cast aluminum, gasketed
Electrical Connection: 2 ea.
electrical conduit hubs
Pressure Connection:
to 600 psi;
1
⁄4 FNPT, 1000 to 3000 psi
Connection Material:
Vacuum Through inH
Carbon steel
All psi Ranges: 316 SS
Dimensions:
psi Ranges:
206 (max) H x 140 W x 70 mm D
(from center line) (7.1 H x 5.5 W x 2.8" D
from center line)
inH2O Ranges:
Weight: 2.7 kg (6 lb)
1
⁄2 MNPT;
W and D = 140 mm (5.5")
H-31
3
⁄4 NPT
1
⁄4 FNPT, vacuum
O Ranges:
2
Setpoint chamber
with 2 adjustable scales.
OPTIONAL CONFIGURATIONS:
Oxygen Service: Specify option “-X6B”
for oxygen cleaning, $75 (316 SS only)
Pressure Switch Options:
(add suffix to part number)
Hermetically sealed 5 A 125/250 Vac
switch for extra protection in severe
environments:
“-P” Single Setpoint, $100
“-PP” Dual Setpoint, $205
316 SS Welded Pressure Activator:
“-S” 15 to 600 psi ranges only, $65
See switch
accessories on page
H-37 for audible alarms
and relay modules.
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INDUSTRIAL PRESSURE SWITCH
WITH DUAL-CHAMBER DESIGN
Top view shows
3
NPT electrical
⁄4
Gasketed cover.
conduit entry
Electrical chamber
isolated from
working fluid
PRESSURE SWITCHES
➤
MOST POPULAR MODELS HIGHLIGHTED!
To Order (Specify Model Number)
ADJUSTABLE RANGE DEADBAND PROOF
MODEL NO. PRICE
SINGLE SETPOINT, ADJUSTABLE DEADBAND, BUNA-N DIAPHRAGM, O-RING,
PSW-401 $520 -6 to -30 inHg vac -20 to -100 kPa 3 to 27 inHg 250 psi 10 A SPDT
PSW-402 530 6 to 30 inH2O 1.5 to 7.5 kPa 3 to 27 inH2O 20 psi 10 A SPDT
PSW-403 530 12 to 60 inH2O 3 to 15 kPa 3 to 54 inH2O 20 psi 10 A SPDT
PSW-404 530 30 to 150 inH2O 7.4 to 37 kPa 15 to 135 inH2O 20 psi 10 A SPDT
PSW-405 495 3 to 15 psi 20 to 100 kPa 2 to 13 psi 500 psi 10 A SPDT
PSW-406 495 6 to 30 psi 40 to 200 kPa 2 to 27 500 psi 10 A SPDT
PSW-407 495 20 to 100 psi 140 to 700 kPa 5 to 90 1000 psi 10 A SPDT
PSW-408 495 40 to 200 psi 280 to 1400 kPa 13 to 180 1000 psi 10 A SPDT
PSW-409 495 80 to 400 psi 0.56 to 2.8 MPa 20 to 360 2400 psi 10 A SPDT
PSW-410 550 200 to 1000 psi 1.4 to 7 MPa 100 to 900 12,000 psi 10 A SPDT
PSW-411 550 600 to 3000 psi 4.2 to 21 MPa 200 to 2800 12,000 psi 10 A SPDT
DUAL SETPOINT, FIXED DEADBAND, BUNA-N DIAPHRAGM,
PSW-421 $550 -6 to -30 inHg vac -20 to -100 kPa 0.5 to 1 inHg 250 psi Two 15 A SPDT
PSW-422 560 6 to 30 inH2O 1.5 to 7.5 kPa 0.5 to 1 inH2O 20 psi Two 15 A SPDT
PSW-423 560 12 to 60 inH2O 3 to 15 kPa 0.5 to 1.3 inH2O 20 psi Two 15 A SPDT
PSW-424 560 30 to 150 inH2O 7.4 to 37 kPa 1.5 to 3 inH2O 20 psi Two 15 A SPDT
PSW-425 525 3 to 15 psi 20 to 100 kPa 0.5 to 1 psi 500 psi Two 15 A SPDT
PSW-426 525 6 to 30 psi 40 to 200 kPa 0.5 to 1.5 psi 500 psi Two 15 A SPDT
PSW-427 525 20 to 100 psi 140 to 700 kPa 1 to 2.5 psi 1000 psi Two 15 A SPDT
PSW-428 525 40 to 200 psi 280 to 1400 kPa 1 to 4 psi 1000 psi Two 15 A SPDT
PSW-429 525 80 to 400 psi 0.56 to 2.8 MPa 4 to 8 psi 2400 psi Two 15 A SPDT
PSW-430 580 200 to 1000 psi 1.4 to 7 MPa 7 to 30 psi 12000 psi Two 15 A SPDT
PSW-431 580 600 to 3000 psi 4.2 to 21 MPa 30 to 70 psi 12000 psi Two 15 A SPDT
DUAL SETPOINT, FIXED DEADBAND, 316 SS DIAPHRAGM,
PSW-445 $580 3 to 15 psi 20 to 100 kPa 0.5 to 1 psi 500 psi Two 15 A SPDT
PSW-446 580 6 to 30 psi 40 to 200 kPa 1 to 2 psi 500 psi Two 15 A SPDT
PSW-447 580 20 to 100 psi 140 to 700 kPa 2 to 4 psi 1000 psi Two 15 A SPDT
PSW-448 580 40 to 200 psi 280 to 1400 kPa 3 to 8 psi 1000 psi Two 15 A SPDT
Comes complete with mounting bracket, and operator’s manual.
Ordering Example: PSW-425, dual-setpoint switch, range 3 to 15 psi, with fixed deadband and Buna-N diagram, $525.
STANDARD METRIC
H-32
STANDARD UNITS
1
⁄
4 FNPT CONNECTION
1
⁄
4 FNPT CONNECTION
PRESSURE SWITCH
1
⁄
4 FNPT CONNECTION
H
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