Omega Products PSW-221 User Manual

INDUSTRIAL PRESSURE SWITCHES

FOR HARSH ENVIRONMENTS

PSW-200 Series

Vacuum to 1700 psi

Starts at

290

⻬ Rugged, One-Piece,

Epoxy-Coated Aluminum Body

⻬ Meets NEMA 4X (IP66)

Classification

⻬ UL Listed, cUL Certified ⻬ Stainless Steel

Nameplate

⻬ Internal Reference Scale

with Adjustment Lock

⻬ Hermetically Sealed

SPDT or DPDT Switch

SPECIFICATIONS

Approvals: UL listed, cUL certified Storage Temperature:

-54 to 71°C (-65 to 160°F)

Ambient Temperature Limits:

-40 to 71°C (-40 to 160°F), except models PSW-234 to PSW-240 and PSW-221 to PSW-226: -18 to 71°C (0 to 160°F); setpoint typically shifts less than 1% of range for a 28°C (50°F) ambient temperature change

Process Temperature:

Stainless Steel: -57 to 204°C

(-70 to 400°F) Phosphor Bronze: -40 to 149°C (-40 to 300°F)

Buna-N: -23 to 93°C (-10 to 200°F)

Shock: Setpoint repeats after 15 g,

10 ms duration Vibration: Setpoint repeats after

2.5 g, 5 to 500 Hz

Enclosure Classification:

Complies with NEMA 4X (IP66) Setpoint Repeatability: 1% of

adjustable range, except models PSW-241 to PSW-245D: 1.5%

Switch Output: Hermetically sealed SPDT or DPDT switch can be wired “normally open” or “normally closed”

Electrical Output: 11 A, 125/250 Vac resistive

Enclosure: Die-cast aluminum, epoxy coated, gasketed

Weight: 0.7 to 2.7 kg (1.5 to 6 lb) (varies by model)

Electrical Connection:

and (2) 22 mm (7⁄8") diameter knockouts

⁄2 NPT

PSW-236, $290,

shown smaller

than actual size.

Pressure Connection:

or 1⁄4 FNPT as noted in “To Order” chart

Dimensions:

psi Ranges:

214 max H x 101 W x 60 mm D (8.4 max x 4 x 2.3") inH2O Ranges: W and D = 152 mm (6")

⁄2 FNPT,

MOST POPULAR MODELS HIGHLIGHTED!

To Order (Specify Model Number)

ADJUSTABLE RANGE

MODEL NO. PRICE BUNA-N DIAPHRAGM, O-RING, 1⁄4FNPT 304 SS PRESSURE CONNECTION

PSW-234 $290 3 to 20 psi 0.21 to 1.38 bar 1 to 4 psi 1000 psi PSW-234D 335 3 to 20 psi 0.21 to 1.38 bar 3.8 psi typ. 1000 psi

PSW-236 290 3 to 100 psi 0.21 to 6.90 bar 2 to 12 psi 1000 psi PSW-236D 335 3 to 100 psi 0.21 to 6.90 bar 11.3 psi typ. 1000 psi

PSW-238 290 15 to 500 psi 1.03 to 34.48 bar 15 to 60 psi 2500 psi PSW-238D 335 15 to 500 psi 1.03 to 34.48 bar 26.3 psi typ. 2500 psi

PSW-240 290 PSW-240D 335

PHOSPHOR-BRONZE BELLOWS, 1⁄4FNPT NICKEL-PLATED BRASS PRESSURE CONNECTION

PSW-246D $345

STANDARD METRIC 0 TO 100 % RANGE

100 to 1700 psi 100 to 1700 psi

30 inHg vac

to 0

6.90 to 117 bar 20 to 110 psi 2500 psi

6.90 to 117 bar 93.8 psi typ. 2500 psi

-1 to 0 bar 11.3 inHg vac typ. 30 psi

DEADBAND FIXED PROOF ADDED

PRESSURE

H-29

SWITCH FEATURE

11 A SPDT 11 A DPDT

11 A DPDT

–

DPDT SWITCH

–

DPDT SWITCH

–

DPDT SWITCH

–

DPDT SWITCH

PSW-241, psi range, $315, shown smaller than actual size.

PRESSURE SWITCHES

See switch

See Section Y for a

Selection of Scientiﬁc,

Technical, and Reference

Books Available from

omega.com

To Order (Specify Model Number)

ADJUSTABLE RANGE DEADBAND

MODEL NO. PRICE WELDED 316 SS DIAPHRAGM,

PSW-231 $425 1 to 20 psi 0.07 to 1.38 bar 0.1 to 3 psi 500 psi

PSW-231D 470 1 to 20 psi 0.07 to 1.38 bar 3.8 psi typ. 500 psi

PSW-232 425 2 to 50 psi

PSW-232D 470 2 to 50 psi

PSW-241 315 5 to 30 psi 0.34 to 2.07 bar 3 to 8 psi 10 psi 2500 psi

PSW-241D 360 5 to 30 psi 0.34 to 2.07 bar 9.8 psi typ. 2500 psI

PSW-242 315 10 to 100 psi 0.69 to 6.90 bar 3 to 30 psi 45 psi 2500 psi

PSW-242D 360 10 to 100 psi 0.69 to 6.90 bar 41.3 psi typ. 2500 psi

PSW-243 315 15 to 300 psi 1.03 to 20.69 bar 10 to 40 psi 60 psi 2500 psi

PSW-243D 360 15 to 300 psi 1.03 to 20.69 bar 52.5 psi typ. 2500 psi

PSW-244 315 20 to 500 psi 1.38 to 34.98 bar 15 to 45 psi 75 psi 2500 psi

PSW-244D 360 20 to 500 psi 1.38 to 34.98 bar 67.5 psi typ. 2500 psi

PSW-245D 360

BUNA-N DIAPHRAGM, O-RING WITH

PSW-221 $470

PSW-221D 515

PSW-222 470

PSW-222D 515

PSW-223 470

PSW-223D 515

PSW-224 470 PSW-225 470

PSW-225D 515

PSW-226 470

PSW-226D 515

Comes complete with operator’s manual. Important Note Regarding DPDT Switches: DPDT switches are manufactured so that contact transfer of both switches occurs at the same

time for rising pressure setpoints. For falling pressure setpoints, a small amount of non-simultaneity in the switch outputs may be observed.

Note: Deadbands are fixed and non-adjustable and tend to increase linearly with increased setpoint. Ordering Example: PSW-241, pressure switch 5 to 30 psi, stainless steel diaphragm, 3 to 8 psi deadband, $315.

STANDARD METRIC RANGE RANGE

80 to 1700 psi

300 vac to 0 inH2O

10 vac to 10 inH2O -24.94 to 24.94 mbar

50 vac to 50 inH2O -124.54 to 124.54 mbar

0.5 to 5 inH2O

2.5 to 50 inH2O 6.23 to 124.154 mbar

10 to 250 inH2O 24.91 to 622.70 mbar

⁄

FNPT 316 SS PRESSURE CONNECTION

0.14 to 3.45 bar

5.50 to 117 bar 168.8 psi typ. 2500 psi

⁄

-747.24 to 0 mbar

1.25 to 12.45 mbar

accessories on page

H-37 for audible alarms

and relay modules.