Miniature Pressure and Vacuum Switches

PSW-500

^AUD260.30 PSW-521

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External Pressure Scale and Pointer for Easy Setpoint Adjustments
5 Amp Model Switches With High Proof Pressures
1 Amp Gold-Plated Switches for TTL and Dry Contact Closures
Wetted Parts: Stainless Steel, Sealing Compound and or O-ring
Control Optional Audible Alarms or Relay Modules

Pressure Switches - View related products

Description

Capable of sensing very low positive or negative pressures, reliability and long life are inherent advantages of this design. Extremely easy set point adjustment: 1) Loosen the lock ring, 2) Turn interface either left or right until pointer is at the desire pressure or vacuum on range label, 3) Retighten the lock ring, and 4) Verify the adjustment by applying pressure or vacuum. See Switch Accessories at omega.com for Audible Alarms and Relay Modules.

PRESSURE MODELS	ADJUSTABLE RANGE (psig)		DEADBAND (psig)	REPEATABILITY (psi)	MAX SYSTEM PRESSURE (psi)	SWITCH
PRESSURE MODELS	DECREASING	INCREASING	DEADBAND (psig)	REPEATABILITY (psi)	MAX SYSTEM PRESSURE (psi)	SWITCH
PSW-521	0.8 to 28.5	1.6 to 30	0.8 to 1.3	±0.6	30	1 A
PSW-522	2.0 to 38.3	3.0 to 40	1.0 to 1.7	±1.0	50	1 A
PSW-523	3.0 to 96.5	4.5 to 100	1.5 to 3.5	±2.0	100	1 A
PSW-524	7.5 to 242.5	9.7 to 250	2.2 to 9.0	±5.0	250	1 A
PSW-525	15 to 458	20 to 500	5.0 to 21	±10	500	1 A
PSW-531	0.8 to 16.3	1.2 to 20	0.6 to 3.7	±0.8	3,000	5 A
PSW-532	2.0 to 42.5	2.0 to 50	0.8 to 7.5	±2.0	3,000	5 A
PSW-533	4.0 to 91	4.0 to 100	1.1 to 9.0	±4.0	5,000	5 A
PSW-534	10 to 222	10 to 250	2.2 to 28	±10	5,000	5 A
PSW-535	20 to 432	20 to 500	3.5 to 68	±20	5,000	5 A
PSW-536	50 to 700	100 to 800	20 to 100	±40	5,000	5 A
VACUUM MODELS	ADJUSTABLE RANGE (inHg)		DEADBAND (inHg)	REPEATABILITY (inHg)	MAX SYSTEM PRESSURE (inHg/psi)	SWITCH
VACUUM MODELS	DECREASING	INCREASING	DEADBAND (inHg)	REPEATABILITY (inHg)	MAX SYSTEM PRESSURE (inHg/psi)	SWITCH
PSW-541	1.6 to 27.0	2.7 to 28.2	1.3 to 2.7	±1.2	29.9/0	1 A
PSW-542	4.0 to 24.8	5.1 to 28.2	1.5 to 3.2	±2.0	29.9/0	1 A
PSW-543	6.0 to 21.5	8.4 to 28.2	2.0 to 7.3	±4.0	29.9/0	1 A
PSW-551	1.2 to 22.5	1.6 to 28.2	1.1 to 5.7	±1.6	29.9/3000	5 A
PSW-552	1.2 to 21.8	8.0 to 28.2	8.0 to 6.4	±8.0	29.9/5000	5 A

Exceeding Max System Pressure may cause a shift in the setpoint.

PSW-560 (1-AMP) AND PSW-570 (5-AMP) SERIES PERFORMANCE TABLE

MODEL	NOMINAL SETPOINT (PSI)	DEAD BAND 1 AMP/5AMP	REPEATABILITY (±PSI)
PSW-561 PSW-571	500 1000 1500 2000 2500	70/120 80/130 90/145 100/160 110/180	25 50 75 100 125
PSW-562 PSW-572	600 1000 1500 2000 2500 3000 3500 4000 5000	113/186 145/220 190/262 235/305 280/345 325/385 364/430 410/470 410/470	45 60 85 100 125 150 175 200 250
PSW-563 PSW-573	700 1000 1500 2000 3000 4000 5000 6000	177/455 210/620 247/730 300/820 315/980 340/1000 355/1110 375/1280	65 75 85 100 150 200 250 300

1 AMP MODEL	5 AMP MODEL	ADJUSTABLE RANGE (psig)		MAX. SYSTEM PRESSURE (psig)	PROOF PRESSURE (psig)
1 AMP MODEL	5 AMP MODEL	DECREASING	INCREASING	MAX. SYSTEM PRESSURE (psig)	PROOF PRESSURE (psig)
PSW-561	PSW-571	500 to 2390	500 to 2500	3000	4500
PSW-562	PSW-572	600 to 4500	600 to 5000	5000	7500
PSW-563	PSW-573	700 to 5500	700 to 6000	6000	9000

Exceeding Max System Pressure values may cause a shift in the setpoint.

SWITCH RATING

MAX. RATING	AC/DC	VOLTS RESISTIVE	AMPS	AMPS INDUCTIVE CONTACTS
1 AMP SPDT	115/28	1/1	1/0.5	Gold**
5 AMP SPDT	250/28	5/5	5/3	Silver

**Use gold contacts for dry and TTL circuitry, ex. 5 Vdc @ 50 mA or less.

SPECIFICATIONS
Approvals: UL (1 Amp switches PSW-520 and PSW-540 Series only)
Process Temp: -55 to 105°C (-65 to 221°F) (2% setpoint shift can occur below -25°C [-13°F] or above 50°C [122°F])
Cycling: Not to exceed 20 cycles/min.
Warranty: 3 year/1 million cycles
Sensor: Piston (PSW-520 and PSW-540 diaphragm)
Proof Pressure: 150% max. system pressure (PSW-530 and PSW-550 proof pressure is the max. system pressure)
Wetted Parts:
   PSW-520 and PSW-540 Series: 17-7 pH SS, 303 SS and loctite sealing compound #271
   PSW-530 and PSW-550 Series: 303 SS, 316 SS, Buna-N O-ring, loctite #271
   PSW-560 and PSW-570 Series: 17-7 PH SS, 303SS, Buna-N O-ring, and loctite #271
Enclosure:
   Body: 303 SS
   Internal Switch Housing and Lock Ring: zinc alloy with chromate finish
   Cap: black valox
Dimensions:
   PSW-520 and PSW-540: 66 L x 28 dia. mm (2.6 L x 1.06" dia.)
   PSW-560 and PSW-570: 71 L x 28 mm dia. (2.8 L x 1.10" dia.)
Pressure Port: 1/8 -27 NPT
Electrical Connection: 20 AWG, three polyvinyl insulated, unjacketed, 300 mm (12") pigtail leads
Wiring Code: Black is common, white is N.O., red is NC (Vacuum models: red is NO, white is NC)
Weight: 113 g (4 oz); PSW-520 and PSW-540 series, 85 g (3 oz)

Caution: Pressure switches are manufactured to the highest quality specifications. However, due to their economical construction, they should be used only for applications where, in the event of product failure, the risk of damage to equipment or personnel is minimal

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Part Number/ Desc.

Qty

Description

Pressure Switches

PSW-521

AUD260.30

Availability: 1 week

1.6-30 psi switch, 1 Amp Gold plated contact and 30 psi max pressure

PSW-522

AUD246.00

Availability: 1 week

3.0-40 psi switch, 1 Amp Gold plated contact and 50 psi max pressure

PSW-523

AUD246.39

Availability: 2 weeks

4.5-100 psi switch, 1 Amp Gold plated contact and 100 psi max pressure

PSW-524

AUD246.39

Availability: 1 week

9.7-250 psi switch, 1 Amp Gold plated contact and 250 psi max pressure

PSW-525

AUD260.30

Availability: 1 week

20-500 psi switch, 1 Amp Gold plated contact and 500 psi max pressure

PSW-531

AUD339.00

Availability: 1 week

1.2-20 psi switch, 5 Amp Silver plated contact and 3000 psi max pressure

PSW-532

AUD339.00

Availability: 1 week

2.0-50 psi switch, 5 Amp Silver plated contact and 3000 psi max pressure

PSW-533

AUD339.00

Availability: 1 week

4.0-100 psi switch, 5 Amp Silver plated contact and 5000 psi max pressure

PSW-534

AUD339.21

Availability: 4 weeks

10-250 psi switch, 5 Amp Silver plated contact and 5000 psi max pressure

PSW-535

AUD339.00

Availability: 1 week

20-500 psi switch, 5 Amp Silver plated contact and 5000 psi max pressure

PSW-536

AUD339.00

Availability: 1 week

100-800 psi switch, 5 Amp Silver plated contact and 5000 psi max pressure

Vacuum Switches

PSW-541

AUD248.52

Availability: 1 week

2.7-28.2 in Hg vacuum switch, 1 Amp Gold plated contact and 0 psi max pressure

PSW-542

AUD235.00

Availability: 1 week

5.1-28.2 in Hg vacuum switch, 1 Amp Gold plated contact and 0 psi max pressure

PSW-543

AUD247.00

Availability: 4 weeks

8.4-28.2 in Hg vacuum switch, 1 Amp Gold plated contact and 0 psi max pressure

PSW-551

AUD339.21

Availability: 1 week

1.6-28.2 in Hg vacuum switch, 5 Amp Silver plated contact and 3000 psi max pressure

PSW-552

AUD337.00

Availability: 1 week

8.0-28.2 in Hg vacuum switch, 5 Amp Silver plated contact and 5000 psi max pressure

High Pressure Switches

PSW-561

AUD337.00

Availability: 4 weeks

500-2500 psi switch, 1 Amp Gold plated contact and 3000 psi max pressure

PSW-562

AUD337.00

Availability: 4 weeks

600-5000 psi switch, 1 Amp Gold plated contact and 5000 psi max pressure

PSW-563

AUD339.00

Availability: 1 week

700-6000 psi switch, 1 Amp Gold plated contact and 6000 psi max pressure

PSW-571

AUD339.21

Availability: 1 week

500-2500 psi switch, 5 Amp Silver plated contact and 3000 psi max pressure

PSW-572

AUD339.21

Availability: 4 weeks

600-5000 psi switch, 5 Amp Silver plated contact and 5000 psi max pressure

PSW-573

AUD337.00

Availability: 4 weeks

700-6000 psi switch, 5 Amp Silver plated contact and 6000 psi max pressure

† All amounts shown in AUD
Ordering Example: (1) PSW-535 20-500 psi switch, 5 Amp Silver plated contact and 5000 psi max pressure, AUD339.00