# Pressure Switch, 1/4" FNPT, 50 psi, 150 psi, SPDT, 250 VAC

![Product image](https://novapart.co/image/farnell:3867859/)

**URL**: https://novapart.co/products/PSW12V-CS/pressure-switch-1-4-fnpt-50-psi-150-spdt-250-vac
**SKU**: PSW12V-CS
**Manufacturer**: OMEGA
**Category**: Sensors & Transducers || Sensors || Pressure Sensors, Transducers || Pressure Switches
**Price**: €713.8400
**Stock**: 10+
**Lead Time**: 43 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | Lead (04-Feb-2026) |
| Deadband Max | 15psi |
| Deadband Min | 5psi |
| Pressure Type | - |
| Product Range | PSW12 Series |
| Sensor Mounting | Stud |
| Pressure Port Size | 1/4" |
| Pressure Port Type | 1/4" FNPT |
| Contact Configuration | SPDT |
| Electrical Connection | Flying Leads |
| Switching Current Max | 5A |
| Switching Voltage Max | 250VAC |
| Operating Pressure Max | 150psi |
| Operating Pressure Min | 50psi |
| Pressure Fitting Style | 1/4" FNPT |
| Operating Temperature Max | 80°C |
| Operating Temperature Min | -50°C |
| Transducer Connection / Termination | 1/2" NPT, Wire Leaded |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3867859/)

## _**compact, vibration-resistant switches for class 1 hazardous locations**_ 

## _**8 to 6000 psi**_ 

## _**psw12 series**_ 

- U **Compact Stainless Steel Construction** 

**==> picture [283 x 158] intentionally omitted <==**

**----- Start of picture text -----**<br>
Setpoint<br>adjustment<br>with cover   PSW12T-BS, shown<br>open (up) actual size.<br>           Belleville<br>= Ly<br>assembly<br>(inside)<br>rugged<br>design<br>**----- End of picture text -----**<br>


U **Belleville Technology for Long Life, Vibration Resistance, and Stability** U **Easy Field Setting and Adjustment** 

- U **SPDT Sealed Switches** 

- U **Strain Relief** 

- U **1.8 m (72") Lead Wires** U **Mounting Bracket for Retrofit Applications** 

OMEGA’S PSW12 offers reliability, repeatability, and durability in a compact design. This switch is rack mountable and has an accessible adjustment when installed. Snapaction Belleville spring design contributes to a long, stable life and to vibration resistance. An optional mounting bracket provides easy retrofit, and an optional cover lock adds security. Ranges are from 8 to 6000 psi (0.6 to 414 bar). 

## **SPECIFICATIONS** 

**Approval:** UL listed, cUL certified; Class I, Groups A, B, C, and D; Class II, Groups E, F, and G; Class III **Storage Temperature:** -50 to 80°C **-** ( 58 to 176°F) 

**Process Temperature: Stainless Steel Diaphragm:** -17 to 160°C (0 to 320°F) **Polyimide Diaphragm:** -28 to 93°C 

- (-20 to 200°F) 

**Ambient Temperature:** -50 to 80°C (-58 to 176°F); setpoint typically shifts less than 1% of range for a 28°C (50°F) ambient temperature change. 

**Shock:** Setpoint repeats after 75 g, 10 ms duration 

**Vibration:** Setpoint repeats after 15 g, 10 to 2000 Hz **Setpoint Repeatability:** ±1% of adjustable range 

**Switch Output:** 1 or 2 SPDT, factorysealed lead wires; mechanical contact life: 10 million cycles 

**Electrical Ratings** : 5 A @ 250 Vac, 

5 A resistive and 3 A inductive 

@ 28 Vdc; silver contacts 

**Enclosure:** 300 stainless steel; NEMA 4X, 7, 9 and IP66 

**Weight:** Approximately 0.34 kg (12 oz) 

**Electrical Connection:**[1] ⁄2 MNPT with 1.8 m (72") lead wires 

**Pressure Connection:**[1] ⁄4 FNPT 

**==> picture [155 x 260] intentionally omitted <==**

**----- Start of picture text -----**<br>
Dimensions:<br>mm (inch)<br>31.8  (1.25)<br>DIA.<br>nop FACTORY-SEALED<br>LEAD WIRES<br>46 (1.8) LONG<br>ff<br>1/2 NPT (ST/ST)<br>ie<br>34.9  (1.38)<br>_ uu<br>ADJUSTMENT<br>ACCESS COVER.<br>SLIDE UP<br>TO OPEN.<br>S&S<br>SLOTTED<br>72.9  (2.88) ADJUSTMENT<br>SCREW.<br>TURN IN<br>TO RAISE<br>SETPOINT.<br>_<br>WIRE COLOR CODING<br>15.9  (0.62) DPDT<br>   SPDT    SW1   SW2<br>_ [tt] COMMON  BRN    BRN       YEL<br>1 N.C.    RED    RED       BLK<br>N.O.    BLU     BLU      VLET<br>1/4 NPT (ST/ST) GROUND     GRN    GRN<br>**----- End of picture text -----**<br>


**H-35** 

**H** 

## _**compact switches**_ 

## **PSW12T-CS, shown smaller than actual size.** 

|**To Order**|**To Order**|**To Order**|**To Order**|**To Order**|**To Order**|**To Order**|**To Order**|**To Order**|**To Order**|**To Order**|**To Order**|**To Order**|**To Order**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**MODEL NO.**|**ADJUSTABLE RANGE**||||**DEADBAND**||||**MAXIMUM**<br>**WORKING**<br>**PRESSURE**||**PROOF PRESSURE**||**SWITCH**|
||**FALL/LOW**||**RISE/HIGH**||**LOW**||**HIGH**|||||||
||**psi**|**bar**|**psi**|**bar**|**psi**|**bar**|**psi**|**bar**|**psi**|**bar**|**psi**|**bar**||
|**1⁄4 FNPT 316 SS PRESSURE CONNECTION, PFA-COATED POLYIMIDE DIAPHRAGM,**<br>**BUNA N O-RING, 1⁄8" ORIFICE, SINGLE 5 A SPDT SWITCH**<br>~~Po~~||||||||||||||
|**PSW12T-AS**<br>~~Po~~<br>~~PCT~~|8<br>~~PCT~~<br>~~lr~~|0.6<br>~~lr~~|30|2.1|2|0.1|6|0.4|600|41|1000|69|Single|
|**PSW12T-BS**<br>~~Po~~<br>~~PCT~~<br>~~Po~~|15<br>~~PCT~~<br>~~lr~~|1.0<br>~~lr~~|55|3.8|3|0.2|8|0.6|600|41|1000|69|Single|
|**PSW12T-CS**<br>~~PCT~~<br>~~Po~~<br>~~PoC~~|30<br>~~PCT~~<br>~~lr~~<br>~~PoC~~<br>~~lr~~|2.1<br>~~lr~~<br>~~lr~~|170|11.7|5|0.3|15|1.0|600|41|1000|69|Single|
|**PSW12T-DS**<br>~~Po~~<br>~~PoC~~<br>~~po~~|100<br>~~PoC~~<br>~~lr~~|6.9<br>~~lr~~|370|25.5|15|1.0|50|3.4|600|41|1000|69|Single|
|**PSW12T-ES**<br>~~PoC~~<br>~~po~~<br>~~PoC~~|200<br>~~PoC~~<br>~~lr~~<br>~~lr~~|13.8<br>~~lr~~<br>~~lr~~|700|48.3|40|2.8|90|6.2|1500|103|3000|206|Single|
|**PSW12T-FS**<br>~~po~~<br>~~PoC~~<br>~~Po~~<br>~~rrtC~~|400<br>~~lr~~|27.6<br>~~lr~~|1500|103.0|100|6.9|250|17.2|3000|206|4500|309|Single|
|**PSW12T-GS**<br>~~PoC~~<br>~~Po~~<br>~~rrtC~~<br>~~es ae~~|1000<br>~~lr~~<br>~~ae~~|68.9<br>~~lr~~<br>~~ee~~|3200<br>~~rs rs~~|220.6<br>~~rs~~|100<br>~~ee~~|6.9<br>~~ee~~|500|34.5<br>~~re~~|6000<br>~~QO~~|414<br>~~QO~~|10,000|689|Single|
|**PSW12T-HS**<br>~~Po~~<br>~~rrtC~~<br>~~es ae~~|2000<br>~~ae~~|137.9<br>~~ee~~|6000<br>~~rs rs~~|414.0<br>~~rs~~|400<br>~~ee~~|27.6<br>~~ee~~|800|55.2<br>~~re~~|8000<br>~~QO~~|551<br>~~QO~~|10,000|689|Single|
|**1⁄4 FNPT 316 SS PRESSURE CONNECTION AND DIAPHRAGM, FKM O-RING, 1⁄8" ORIFICE, SINGLE 5 A SPDT SWITCH**<br>~~es aeee~~<br>~~rs rs ee~~<br>~~reQO~~<br>~~Po~~||||||||||||||
|**PSW12V-AS**<br>~~Po~~<br>~~PC~~|9<br>~~lr~~|0.6<br>~~lr~~|35|2.4|2|0.1|7|0.5|600|41|1000|69|Single|
|**PSW12V-BS**<br>~~Po~~<br>~~PC~~<br>~~Po~~|25<br>~~lr~~|1.7<br>~~lr~~|65|4.5|3|0.2|10|0.7|600|41|1000|69|Single|
|**PSW12V-CS**<br>~~PC~~<br>~~Po~~<br>~~PoC~~|50<br>~~lr~~<br>~~PoC~~<br>~~|~~|3.5<br>~~lr~~|150|10.3|5|0.3|15|1.0|600|41|1000|69|Single|
|**PSW12V-DS**<br>~~Po~~<br>~~PoC~~<br>~~po~~|100<br>~~PoC~~<br>~~|~~|6.9|350|24.1|15|1.0|50|3.4|600|41|1000|69|Single|
|**PSW12V-ES**<br>~~PoC~~<br>~~po~~<br>~~PoC~~|250<br>~~PoC~~<br>~~|~~<br>~~lr~~|17.2<br>~~lr~~|700|48.3|40|2.8|95|6.6|1500|103|3000|206|Single|
|**PSW12V-FS**<br>~~po~~<br>~~PoC~~<br>~~Port~~|400<br>~~lr~~|27.6<br>~~lr~~|1500|103.0|100|6.9|300|20.7|3000|206|4500|309|Single|
|**PSW12V-GS**<br>~~PoC~~<br>~~Port~~<br>~~es~~|1000<br>~~lr~~<br>~~ee~~|68.9<br>~~lr~~<br>~~es es~~|3200<br>~~es~~|220.6<br>~~rs~~|100<br>~~ee~~|6.9<br>~~ee~~|500|34.5<br>~~re~~|6000<br>~~QQ~~|414<br>~~QQ~~|10,000<br>~~ne~~|689|Single|
|**PSW12V-HS**<br>~~Port~~<br>~~es~~|2000<br>~~ee~~|137.9<br>~~es es~~|6000<br>~~es~~|414.0<br>~~rs~~|400<br>~~ee~~|27.6<br>~~ee~~|1000|69<br>~~re~~|8000<br>~~QQ~~|551<br>~~QQ~~|10,000<br>~~ne~~|689|Single|
|**1⁄4 FNPT 316 SS PRESSURE CONNECTION, PFA-COATED POLYIMIDE DIAPHRAGM,**<br>**BUNA-N O-RING, 1⁄8" ORIFICE, DUAL 5 A SPDT SWITCH**<br>~~es~~<br>~~ee es es rs ee~~<br>~~reQQ~~<br>~~ne~~<br>~~PoC~~||||||||||||||
|**PSW12T-AD**<br>~~PoC~~<br>~~po~~|8|0.6|30|2.1|2|0.1|6|0.4|600|41|1000|69|Dual|
|**PSW12T-BD**<br>~~PoC~~<br>~~po~~<br>~~PoE~~|15<br>~~PoE~~|1.0|55|3.8|3|0.2|8|0.6|600|41|1000|69|Dual|
|**PSW12T-CD**<br>~~po~~<br>~~PoE~~<br>~~Po~~<br>~~rrtC~~|30<br>~~PoE~~<br>~~el~~|2.1<br>~~el~~|170|11.7|5|0.3|15|1.0|600|41|1000|69|Dual|
|**PSW12T-DD**<br>~~PoE~~<br>~~Po~~<br>~~rrtC~~<br>~~PoE~~|100<br>~~PoE~~<br>~~el~~<br>~~PoE~~|6.9<br>~~el~~|370|25.5|15|1.0|50|3.4|600|41|1000|69|Dual|
|**PSW12T-ED**<br>~~Po~~<br>~~rrtC~~<br>~~PoE~~<br>~~PoC~~|200<br>~~el~~<br>~~PoE~~<br>~~PoC~~<br>~~lr~~|13.8<br>~~el~~<br>~~lr~~|700|48.3|40|2.8|90|6.2|1500|103|3000|206|Dual|
|**PSW12T-FD**<br>~~PoE~~<br>~~PoC~~<br>~~Po~~|400<br>~~PoE~~<br>~~PoC~~<br>~~lr~~|27.6<br>~~lr~~|1500|103.0|100|6.9|250|17.2|3000|206|4500|309|Dual|
|**PSW12T-GD**<br>~~PoC~~<br>~~Po~~<br>~~es~~|1000<br>~~PoC~~<br>~~lr~~<br>~~ee~~|68.9<br>~~lr~~<br>~~es~~|3200<br>~~es~~|220.6<br>~~es~~|100<br>~~ee~~|6.9<br>~~ee~~|500<br>~~re~~|34.5<br>~~re~~|6000<br>~~QQ~~|414<br>~~QQ~~|10,000<br>~~ne~~|689|Dual|
|**PSW12T-HD**<br>~~Po~~<br>~~es~~|2000<br>~~ee~~|137.9<br>~~es~~|6000<br>~~es~~|414.0<br>~~es~~|400<br>~~ee~~|27.6<br>~~ee~~|800<br>~~re~~|55.2<br>~~re~~|8000<br>~~QQ~~|551<br>~~QQ~~|10,000<br>~~ne~~|689|Dual|
|**1⁄4 FNPT 316 SS PRESSURE CONNECTION AND DIAPHRAGM, FKM O-RING, 1⁄8" ORIFICE, DUAL 5 A SPDT SWITCH**<br>~~es~~<br>~~ee~~<br>~~es es ee~~<br>~~reQQ~~<br>~~ne~~<br>~~PoC~~<br>~~CL~~||||||||||||||
|**PSW12V-AD**<br>~~PoC~~<br>~~po~~|9<br>~~CL~~|0.6<br>~~CL~~|35|2.4|2|0.1|7|0.5|600|41|1000|69|Dual|
|**PSW12V-BD**<br>~~PoC~~<br>~~po~~<br>~~PoC~~|25<br>~~CL~~<br>~~lr~~|1.7<br>~~CL~~<br>~~lr~~|65|4.5|3|0.2|10|0.7|600|41|1000|69|Dual|
|**PSW12V-CD**<br>~~po~~<br>~~PoC~~<br>~~Po~~<br>~~rt—C~~|50<br>~~lr~~|3.5<br>~~lr~~|150|10.3|5|0.3|15|1.0|600|41|1000|69|Dual|
|**PSW12V-DD**<br>~~PoC~~<br>~~Po~~<br>~~rt—C~~<br>~~PoE~~|100<br>~~lr~~<br>~~PoE~~|6.9<br>~~lr~~|350|24.1|15|1.0|50|3.4|600|41|1000|69|Dual|
|**PSW12V-ED**<br>~~Po~~<br>~~rt—C~~<br>~~PoE~~<br>~~pC~~|250<br>~~PoE~~|17.2|700|48.3|40|2.8|95|6.6|1500|103|3000|206|Dual|
|**PSW12V-FD**<br>~~PoE~~<br>~~pC~~<br>~~Po~~|400<br>~~PoE~~|27.6|1500|103.0|100|6.9|300|20.7|3000|206|4500|309|Dual|
|**PSW12V-GD**<br>~~pC~~<br>~~Po~~<br>~~Porclm~~|1000<br>~~lm~~|68.9|3200|220.6|100|6.9|500|34.5|6000|414|10,000|689|Dual|
|**PSW12V-HD**<br>~~Po~~<br>~~Porclm~~|2000<br>~~lm~~|137.9|6000|414.0|400|27.6|1000|69|8000|551|10,000|689|Dual|



_Comes complete with operator’s manual._ 

_**Ordering Examples: PSW12T-DS-GND,** single 5 A SPDT switch with PFA-coated diaphragm and external grounding screw._ _**PSW12V-ED,** dual 5 A SPDT switch with 316 SS diaphragm and FKM O-ring._ 

## **ACCESSORIES** 

|**MODEL NO.**|**DESCRIPTION**|
|---|---|
|**PSW12-CL**|Cover lock|
|**PSW12-MB**|Mounting|



**H-36** 



## Links

- [View this product on Novapart](https://novapart.co/products/PSW12V-CS/pressure-switch-1-4-fnpt-50-psi-150-spdt-250-vac)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/omega/psw12v-cs/pressure-switch-150psi-1port-1/dp/3867859)
---

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