PSW-624
Pressure Switch, Gauge, 1/8"-27 MNPT, 7.5 psi, 250 psi, SPST
- Manufacturer: OMEGA
- Product type: Pressure Switches
- SVHC: No SVHC (04-Feb-2026)
- Deadband Max: 9psi
- Deadband Min: 2.2psi
- Pressure Type: Gauge
- Product Range: PSW-620 Series
- Sensor Mounting: Stud
- Pressure Port Size: 1/8"-27
- Pressure Port Type: 1/8"-27 MNPT
- Contact Configuration: SPST
- Electrical Connection: Pigtail Leads
- Switching Current Max: 3A
- Switching Voltage Max: -
- Operating Pressure Max: 250psi
- Operating Pressure Min: 7.5psi
- Pressure Fitting Style: 1/8"-27 MNPT
- Operating Temperature Max: -
- Operating Temperature Min: -
- Transducer Connection / Termination: Pigtail Leads
| Delivery and price | |
|---|---|
| Units per pack | 1 |
| Price | 188.55 € |
| Current stock | 10+ |
| Lead time | 30 days |
## _**Economical prEssurE and Vacuum switchEs**_ ## _**Vacuum to 500 psi**_ ## _**psw-620/psw-630 series**_ - U **External Pressure Scale and Pointer for Easy Setpoint Adjustment** - U **Silver Switch Contacts Rated for 5 A @ 250 Vac or 3 A @ 28 Vdc** - U **1 A Gold-Plated Contacts for TTL or Dry Contacts** **==> picture [319 x 184] intentionally omitted <==** **----- Start of picture text -----**<br> Knurled<br>locking<br>—— —r t ring. — _'- By<br>Sliding<br>Gage<br>pointer.<br>PSW-631 PSW-633<br>Field<br>adjustable<br>**----- End of picture text -----**<br> **==> picture [122 x 7] intentionally omitted <==** **----- Start of picture text -----**<br> Both models shown actual size.<br>**----- End of picture text -----**<br> ## **SPECifiCATionS** **Process Temp:** -55 to 105°C (-65 to 221°F); 2% setpoint shift can occur below -23°C (-10°F) or above 52°C (125°F) **Repeatability:** ±2% of maximum system pressure **Cycling:** Not to exceed 20 cycles/ minimum **Warranty:** 3 year/1 million cycles **Proof Pressure:** 150% maximum pressure **Wetted Parts:** 17-7 PH stainless steel, loctite sealing compound #271, ZA8 chromate finish **Enclosure:** Zinc alloy, chromate finish **Dimensions:** 48 L x 28 mm Dia. (1.9 x 1.1") **Pressure Port:**[1] /[8] -27 MNPT **Electrical Connection:** 300 mm (12") pigtail leads, 20 AWG, polyvinyl insulated **Wiring Code (Pressure):** Red = N/C White = N/O Black = Common **Wiring Code (Vacuum):** Red = N/O White = N/C Black = Common **Weight:** Approx. 57 g (2 oz) ## **To Order** |**To Order**|**To Order**|**To Order**|**To Order**|**To Order**|**To Order**| |---|---|---|---|---|---| |**MoDEL no.**|**ADjuSTABLE RAnGE**<br>**DECREASinG inCREASinG***||**DEADBAnD**|**MAx**<br>**PRES***|**SWiTCH**| |**Gage Pressure Switches(units =psi)**<br>~~a~~<br>~~es~~|||||| |**PSW-621**<br>~~a~~<br>~~a~~|0.8 to 28.5<br>~~es~~|1.6 to 30<br>~~ee~~|0.8 to 1.3|30|1 A| |**PSW-622**<br>~~a~~<br>~~es~~<br>~~a~~<br>~~es~~|2.0 to 38.3<br>~~es~~<br>~~es~~<br>~~es~~|3.0 to 40<br>~~es~~<br>~~ee~~<br>~~ee~~|1.0 to 1.7<br>~~es~~<br>~~ee~~|50<br>~~es~~<br>~~ee~~|1 A<br>~~es~~<br>~~ee~~| |**PSW-623**<br>~~a~~<br>~~es~~|3.0 to 96.5<br>~~es~~|4.5 to 100<br>~~ee~~<br>~~ee~~|1.5 to 3.5<br>~~ee~~|100<br>~~ee~~|1 A<br>~~ee~~| |**PSW-624**<br>~~es~~|7.5 to 242.5<br>~~es~~|9.7 to 250<br>~~ee~~|2.2 to 9.0<br>~~ee~~|250<br>~~ee~~|1 A<br>~~ee~~| |**PSW-625**<br>~~es~~<br>~~a~~<br>~~es~~|15 to 485<br>~~es~~|20 to 500<br>~~ee~~|5.0 to 21<br>~~ee~~|500<br>~~ee~~|1 A<br>~~ee~~| |**PSW-631**<br>~~es~~<br>~~es~~|0.8 to 28.5|1.6 to 30|0.8 to 1.3|30|5 A| |**PSW-632**<br>~~es~~<br>~~es~~<br>~~ee~~|2.0 to 38.3<br>~~es ee~~|3.0 to 40<br>~~ee~~|1.0 to 1.7|50|5 A| |**PSW-633**<br>~~es~~<br>~~ee~~<br>~~a~~|3.0 to 96.5<br>~~es ee~~|4.5 to 100<br>~~ee~~<br>~~ee~~|1.5 to 3.5|100|5 A| |**PSW-634**<br>~~ee~~<br>~~es~~<br>~~a~~|7.5 to 242.5<br>~~es ee~~<br>~~es~~<br>~~a~~|9.7 to 250<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~ee~~|2.2 to 9.0<br>~~es~~<br>~~ee~~|250<br>~~es~~<br>~~ee~~|5 A<br>~~es~~<br>~~ee~~| |**PSW-635**<br>~~a~~|15 to 485<br>~~a~~|20 to 500<br>~~ee~~<br>~~ee~~|5.0 to 21<br>~~ee~~|500<br>~~ee~~|5 A<br>~~ee~~| |**Vacuum Switches(units = inHg Vacuum)**<br>~~a~~<br>~~ee ee~~<br>~~ee~~<br>~~ee~~|||||| |**PSW-626**<br>~~ee~~<br>~~ee~~|1.6 to 27.0<br>~~ee~~<br>~~es~~|2.7 to 28.2<br>~~ee~~<br>~~ee~~|1.3 to 2.7<br>~~ee~~|~~ee~~<br>~~|~~|1 A<br>~~ee~~<br>~~|~~| |**PSW-627**<br>~~ee~~<br>~~ee~~<br>~~ee~~|4.0 to 24.8<br>~~ee~~<br>~~es~~<br>~~ee ee~~|5.1 to 28.2<br>~~ee~~<br>~~ee~~<br>~~ee~~|1.5 to 3.2<br>~~ee~~||1 A<br>~~ee~~<br>~~|~~<br>~~||~~| |**PSW-628**<br>~~ee~~<br>~~ee~~<br>~~ee~~|6.0 to 21.5<br>~~es~~<br>~~ee ee~~<br>~~ee~~|8.4 to 28.2<br>~~ee~~<br>~~ee~~<br>~~ee~~|2.0 to 7.3|28.2 inHg<br>vacuum or<br>0 psig*****<br>~~|~~<br>~~|~~|1 A<br>~~|~~<br>~~||~~<br>~~|~~| |**PSW-636**<br>~~ee~~<br>~~ee~~<br>~~ee~~|1.6 to 27.0<br>~~ee ee~~<br>~~ee~~<br>~~es~~|2.7 to 28.2<br>~~ee~~<br>~~ee~~|1.3 to 2.7||5 A<br>~~||~~<br>~~|~~<br>~~|~~| |**PSW-637**<br>~~ee ~~<br>~~ee~~<br>~~ee~~|4.0 to 24.8<br> ~~ee~~<br>~~es~~|5.1 to 28.2<br>~~ee~~|1.5 to 3.2||5 A<br>~~|~~<br>~~|~~<br>~~|~~| |**PSW-638**<br>~~ee~~<br>~~ee~~|6.0 to 21.5<br>~~es~~|8.4 to 28.2|2.0 to 7.3||5 A<br>~~|~~<br>~~||~~| _*****[ Exceeding these values may cause a shift in the setpoint. ] Comes complete with operator’s manual._ _**Ordering Example: PSW-635,** switch for maximum system pressure of 500 psig with 5 A switch contact._ **H-13**
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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