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OEM Mechanical Pressure Switch With Relay Or Alarm

Original price was: $150.95.Current price is: $98.99.

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

Switch Type

Pressure Range

Pressure Type

Deadband Range

Features

Clear

SKU: PSW-521 Categories: Pressure Measurement, Pressure Switches Tag: Omega Engineering

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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

Switch Type	(1) 1 A SPST, (1) 5 A SPST
Pressure Range	0.8 to 30 psi, 2 to 40 psi, 3 to 100 psi, 7.5 to 250 psi, 15 to 500 psi, 0.8 to 20 psi, 2 to 50 psi, 4 to 100 psi, 10 to 250 psi, 20 to 500 psi, 50 to 800 psi, -28.2 to 1.6 inHg, -28.2 to 4 inHg, -28.2 to 6 inHg, -28.2 to -1.2 inHg, 500 to 2,500 psi, 600 to 5,000 psi, 700 to 6,000 psi
Pressure Type	Gauge, Vacuum
Deadband Range	0.8 to 1.3 psi, 1.0 to 1.7 psi, 1.5 to 3.5 psi, 2.2 to 9.0 psi, 5.0 to 21 psi, 0.6 to 3.7 psi, 0.8 to 7.5 psi, 1.1 to 9.0 psi, 2.2 to 28 psi, 3.5 to 68 psi, 20 to 100 psi, 1.3 to 2.7 inHg, 1.5 to 3.2 inHg, 2.0 to 7.3 inHg, 1.1 to 5.7 inHg, 8.0 to 6.4 inHg, 70 to 110 psi, 133 to 410 psi, 177 to 375 psi, 120 to 180 psi, 186 to 470 psi, 455 to 1,280 psi
Features	Gold plated contact, Silver plated contact
Pressure Port Size	1/8"
Pressure Port Type	NPT Male
Deadband	Fixed