# Pressure Switch, Vacuum, 1/4" MNPT, 1.5 psi, 3.5 psi, SPDT

![Product image](https://novapart.co/image/farnell:3867890/)

**URL**: https://novapart.co/products/PSW-581/pressure-switch-vacuum-1-4-mnpt-15-psi-35-spdt
**SKU**: PSW-581
**Manufacturer**: OMEGA
**Category**: Sensors & Transducers || Sensors || Pressure Sensors, Transducers || Pressure Switches
**Price**: €94.7300
**Stock**: 10+
**Lead Time**: 36 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (04-Feb-2026) |
| Deadband Max | 1.7psi |
| Deadband Min | 0.5psi |
| Pressure Type | Vacuum |
| Product Range | PSW-580 Series |
| Sensor Mounting | Stud |
| Pressure Port Size | 1/4" |
| Pressure Port Type | 1/4" MNPT |
| Contact Configuration | SPDT |
| Electrical Connection | Screw |
| Switching Current Max | 15A |
| Switching Voltage Max | - |
| Operating Pressure Max | 3.5psi |
| Operating Pressure Min | 1.5psi |
| Pressure Fitting Style | 1/4" MNPT |
| Operating Temperature Max | 85°C |
| Operating Temperature Min | -35°C |
| Transducer Connection / Termination | Screw |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3867890/)

**H** 

## _**ECONOMICAL OEM PRESSURE SWITCHES**_ 

## _**Vacuum to 500 psi**_ 

## _**PSW-580 Series**_ 

U **External Scale for Easy Setpoint Adjustments** U **UL-Rated Heavy-Duty 15 A SPDT Switch** 

## **SPECIFICATIONS** 

**Switch:** 15 A SPDT silver contacts 

**Approval:** UL 

**Process Temp:** -35 to 85°C (-31 to 185°F); 2% setpoint shift can occur below -23°C (-10°F) or above 52°C (125°F) 

**==> picture [61 x 23] intentionally omitted <==**

**----- Start of picture text -----**<br>
PSW-581,<br>shown close to<br>actual size.<br>**----- End of picture text -----**<br>


**Proof Pressure:** 600 psig **Cycling:** Not to exceed 60 cycles/ minimum 

**Warranty:** 3 years/1 million cycles **Sensor:** Aluminum diaphragm **Wetted Parts:** Buna-N, aluminum, zinc alloy chromate finish and loctite sealing compound #271 

**Enclosure:** Switch actuator and bracket steel: irridite finish; adjusting cap and body: zinc alloy chromate finish; switch shield: Mylar[®] 

**Pressure Port:**[1] ⁄4 MNPT 

**Electrical Connection:** Screw terminals **Size:** 92 H x 60 W x 41 mm Dia. (3[5] ⁄8 x 2[3] ⁄8 x 1[5] ⁄8") **Weight:** 210 g (7.4 oz) 

_**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._ 

## **To Order** 

|**To Order**|**To Order**|**To Order**|**To Order**|**To Order**|
|---|---|---|---|---|
|**MODEL NO.**|**ADJUSTABLE RANGE**|**DEADBAND**|**REPEATABILITY**|**PROOF PRESSURE**|
|**PSW-581**|6 to 28 inHg Vac<br>1.5 to 3.5 psig|3 to 14 inHg<br>0.5 to 1.7 psig|±1.2 inHg<br>±0.15 psig|29.9 inHg Vac<br>600 psig|
|**PSW-582**|3 to 40psig|2 to 5psig|±1.0psig|600psig|
|**PSW-583**|30 to 150psig|5 to 30psig|±5.0psig|600psig|
|**PSW-584**|100 to 500 psig|30 to 120 psig|±20 psig|600 psig|



_Comes complete with operator’s manual._ 

_**Ordering Examples: PSW-582,** economical OEM pressure switch with adjustable range of 3 to 40 psig and 600 psig proof pressure._ _**PSW-584,** economical OEM pressure switch with adjustable range of 100 to 500 psig and 600 psig proof pressure._ 

**H-12** 



## Links

- [View this product on Novapart](https://novapart.co/products/PSW-581/pressure-switch-vacuum-1-4-mnpt-15-psi-35-spdt)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/omega/psw-581/pressure-switch-3-5psi-1port-1/dp/3867890)
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