PSW-523
Pressure Switch, Gauge, 1/8"-27 NPT, 3 psi, 100 psi, SPDT, 115 VAC
- Manufacturer: OMEGA
- Product type: Pressure Switches
- SVHC: No SVHC (04-Feb-2026)
- Deadband Max: 3.5psi
- Deadband Min: 1.5psi
- Pressure Type: Gauge
- Product Range: PSW-500 Series
- Sensor Mounting: Stud
- Pressure Port Size: 1/8"-27
- Pressure Port Type: 1/8"-27 NPT
- Contact Configuration: SPDT
- Electrical Connection: Pigtail Leads
- Switching Current Max: 500mA
- Switching Voltage Max: 115VAC
- Operating Pressure Max: 100psi
- Operating Pressure Min: 3psi
- Pressure Fitting Style: 1/8"-27 NPT
- Operating Temperature Max: -
- Operating Temperature Min: -
- Transducer Connection / Termination: Pigtail Leads
| Delivery and price | |
|---|---|
| Units per pack | 1 |
| Price | 198.16 € |
| Current stock | 10+ |
| Lead time | 22 days |
## _**MINIATURE PRESSURE AND VACUUM SWITCHES**_ ## _**Vacuum to 800 psi**_ ## _**PSW-500 Series**_ - U **external pressure scale and pointer for easy setpoint Adjustments** - U **5 A Model switches with High proof pressures** - U **1 A gold-plated switches for ttl and dry-contact closures** - U **stainless steel, sealing compound and/or o-ring wetted parts** **==> picture [35 x 7] intentionally omitted <==** **----- Start of picture text -----**<br> psw-523<br>**----- End of picture text -----**<br> **==> picture [92 x 7] intentionally omitted <==** **----- Start of picture text -----**<br> both shown actual size.<br>**----- End of picture text -----**<br> **==> picture [36 x 7] intentionally omitted <==** **----- Start of picture text -----**<br> psw-541<br>**----- End of picture text -----**<br> ## **[T][o][O][r][de][r]** |**[T][o][o] [O][r][de][r][r][de][r][de][r][r]**|**[T][o][o] [O][r][de][r][r][de][r][de][r][r]**|**[T][o][o] [O][r][de][r][r][de][r][de][r][r]**|**[T][o][o] [O][r][de][r][r][de][r][de][r][r]**|**[T][o][o] [O][r][de][r][r][de][r][de][r][r]**|**[T][o][o] [O][r][de][r][r][de][r][de][r][r]**|**[T][o][o] [O][r][de][r][r][de][r][de][r][r]**| |---|---|---|---|---|---|---| |**pressure**<br>**Models**|**pressure**<br>**AdjustAble rAnge(psig)**||**deAdbAnd**<br>**(psig) **|**repeAtAbility MAx systeM**<br>**(psi)**<br>**pressure (psi)* switcH**|**repeAtAbility MAx systeM**<br>**pressure (psi)* switcH**|**pressure (psi)* switcH**| ||**decreAsing**|**increAsing**||||| |**psw-521**<br>~~a~~<br>~~Re~~|0.8 to 28.5<br>~~a~~<br>~~a~~|1.6 to 30|0.8 to 1.3|±0.6|30|1 A| |**psw-522**<br>~~Re~~|2.0 to 38.3<br>~~a~~|3.0 to 40|1.0 to 1.7|±1.0|50|1 A| |**psw-523**<br>~~Re~~<br>~~a~~|3.0 to 96.5<br>~~a~~<br>~~a~~<br>~~a~~|4.5 to 100<br>~~a~~|1.5 to 3.5|±2.0|100|1 A| |**psw-524**<br>~~a~~<br>~~ee~~|7.5 to 242.5<br>~~a~~<br>~~a~~|9.7 to 250|2.2 to 9.0|±5.0|250|1 A| |**psw-525**<br>~~ee~~<br>~~Re~~|15 to 485<br>~~a~~<br>~~a~~|20 to 500|5.0 to 21|±10|500|1 A| |**psw-531**<br>~~ee~~<br>~~Re~~<br>~~Re~~|0.8 to 16.3<br>~~a~~<br>~~a~~|1.2 to 20|0.6 to 3.7|±0.8|3000|5 A| |**psw-532**<br>~~Re~~<br>~~Re~~<br>~~Re~~|2.0 to 42.5<br>~~a~~<br>~~a~~|2.0 to 50|0.8 to 7.5|±2.0|3000|5 A| |**psw-533**<br>~~Re~~<br>~~Re~~|4.0 to 91<br>~~a~~|4.0 to 100|1.1 to 9.0|±4.0|5000|5 A| |**psw-534**<br>~~Re~~<br>~~a~~|10 to 222<br>~~a~~<br>~~a~~<br>~~a~~|10 to 250<br>~~a~~|2.2 to 28|±10|5000|5 A| |**psw-535**<br>~~a~~|**psw-535**<br>20 to 432<br>~~a~~|20 to 500|3.5 to 68|±20|5000|5 A| |**psw-536**<br>~~a~~|50 to 700<br>~~aa~~|100 to 800<br>~~a~~|20 to 100|±40|5000|5 A| |**vAcuuM**<br>**Models**|**AdjustAble rAnge (inHg)**||**deAdbAnd**<br>**(inHg)**|**repeAtAbility**<br>**(inHg)**|**MAx systeM**<br>**pressure**<br>**(inHg vac/psig)***|**switcH**| ||**decreAsing**|**increAsing**||||| |**psw-541**<br>~~a~~<br>~~ee~~|1.6 to 27.0<br>~~a~~<br>~~a~~|2.7 to 28.2|1.3 to 2.7|±1.2|29.9/0|1 A| |**psw-542**<br>~~ee~~<br>~~Re~~|4.0 to 24.8<br>~~a~~<br>~~a~~|5.1 to 28.2|1.5 to 3.2|±2.0|29.9/0|1 A| |**psw-543**<br>~~ee~~<br>~~Re~~<br>~~Re~~|6.0 to 21.5<br>~~a~~<br>~~a~~|8.4 to 28.2|2.0 to 7.3|±4.0|29.9/0|1 A| |**psw-551**<br>~~Re~~<br>~~Re~~|1.2 to 22.5<br>~~a~~|1.6 to 28.2|1.1 to 5.7|±1.6|29.9/3000|5 A| |**psw-552**<br>~~Re~~<br>~~a~~|1.2 to 21.8|8.0 to 28.2|8.0 to 6.4|±8.0|29.9/5000|5 A| _*****[ Exceeding these values may cause a shift in the setpoint.] Comes complete with operator’s manual._ _**Ordering Example: PSW-525,** gage model switch for maximum system pressure of 500 psi._ **H-15** **H** ## _**MINIATURE HIGH-PRESSURE SWITCHES**_ ## U **500 to 6000 psi** U **1 A and 5 A switch Models** U **Heavy-duty overpressure protection** **psw-562 psw-571shown shown actual size. actual size.** ## **psw-560 (1 A) And psw-570 (5 A) series perForMAnce tAble** |**Model**|**noMinAl**<br>**setpoint**<br>**(psi)**|**deAdbAnd repeAtAbility**<br>**1 A/5 A**|**deAdbAnd repeAtAbility**<br>**(±psi)**| |---|---|---|---| |**psw-561**<br>**psw-571**|500<br>1000<br>1500<br>2000<br>2500|70/120<br>80/130<br>90/145<br>100/160<br>110/180|25<br>50<br>75<br>100<br>125| |**psw-562**<br>**psw-572**|600<br>1000<br>1500<br>2000<br>2500<br>3000<br>3500<br>4000<br>5000|113/186<br>145/220<br>190/262<br>235/305<br>280/345<br>325/385<br>364/430<br>410/470<br>410/470|45<br>60<br>85<br>100<br>125<br>150<br>175<br>200<br>250| |**psw-563**<br>**psw-573**|700<br>1000<br>1500<br>2000<br>3000<br>4000<br>5000<br>6000|177/455<br>210/620<br>247/730<br>300/820<br>315/980<br>340/1000<br>355/1110<br>375/1280|65<br>75<br>85<br>100<br>150<br>200<br>250<br>300| ## **speciFicAtions** **proof pressure:** 150% max system pressure (PSW-530 and PSW-550: proof pressure is the max system pressure) **wetted parts:** **Approvals:** UL (1 A 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)] **psw-520 and 540 series:** 17-7 PH SS, 303 SS and loctite #271 **psw-530 and 550 series:** 303 SS, 316 SS, Buna-N O-ring, loctite #271 **psw-560 and 570 series:** 17-7 PH SS, 303 SS, Buna-N O-ring and loctite #271 **cycling:** Not to exceed 20 cycles/min **warranty:** 3 year/1 million cycles **sensor:** Piston (PSW-520 and PSW-540: diaphragm) ## **enclosure:** **body:** 303 SS **internal switch Housing and lock ring:** Zinc alloy, chromate finish **cap:** Black Valox[®] **dimensions:** **psw-520 and psw-540:** 65 L x 28.6 mm Dia. (2.56 x 1.13") **psw-560 and psw-570:** 71 L x 27.8 mm Dia. (1.75 x 1.09") **pressure port:**[1] ⁄8-27 NPT **electrical connection:** 20 AWG, 3 polyvinyl-insulated, unjacketed, 300 mm (12") pigtail leads **wiring code (pressure):** Red = N/C White = N/O Black = Common **wiring code (vacuum):** Red = N/O White = N/C Black = Common **weight:** 113 g (4 oz); PSW-520 and PSW-540 Series: 85 g (3 oz) ## **[To Order]** |**[To Order]**|**[To Order]**|**[To Order]**|**[To Order]**|**[To Order]**|**[To Order]**| |---|---|---|---|---|---| |**1 A**<br> **Model**|**5 A**<br>**Model**|**AdjustAble rAnge(psig)**||**MAx systeM**<br>**pressure**<br>**(psig)**|**prooF**<br>**pressure**<br>**(psig)**| |||**decreAsing**|**increAsing**||| |**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 these values may cause a shift in the setpoint.]_ **switcH rAting** **volts AMps MAx rAting Ac/dc resistive AMps inductive contActs** 1 A SPDT 115/28 1/1 1/0.5 Gold** 5 A SPDT 250/28 5/5 5/3 Silver ~~—~~ _******[ Use gold contacts for dry and TTL circuitry (e.g., 5 Vdc @ 50 mA or less).]_ **caution:** Pressure switches are manufactured to the highest-quality specifications. However, because of their economical construction, they should be used only for applications in which, in the event of product failure, the risk of damage to equipment or personnel is minimal. **H-16**
Updated at June 9, 2026
Omega is a globally recognized leader in the design and manufacture of state-of-the-art products for process measurement and control. Renowned for its engineering expertise, the company provides highly reliable solutions for monitoring critical parameters such as temperature, humidity, pressure, strain, and flow across diverse industrial applications. Our extensive selection of Omega products is focused on the brand's core strengths in sensing and automation technologies. The range features a vast array of high-precision temperature sensors, including industry-standard thermocouples and RTDs, supported by a comprehensive selection of essential sensor accessories. To complement these measurement devices, we offer a substantial lineup of robust temperature controllers and advanced pressure transducers engineered to maintain precise conditions in demanding environments. Beyond primary sensing and control, the Omega portfolio encompasses sophisticated panel instrumentation for clear process visualization, alongside highly accurate force sensors and load cells. The offering is completed by reliable signal converters, data acquisition tools such as dataloggers, and fundamental connectivity components, providing professionals with the specialized equipment necessary to build complete, end-to-end industrial control systems.
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