# Pressure Switch, Gauge, 1/4" FNPT, 0 psi, 50 psi, DPDT, 480 VAC ![Product image](https://novapart.co/image/farnell:3867914/) **URL**: https://novapart.co/products/PSW-852BK/pressure-switch-gauge-1-4-fnpt-0-psi-50-dpdt-480 **SKU**: PSW-852BK **Manufacturer**: OMEGA **Category**: Sensors & Transducers || Sensors || Pressure Sensors, Transducers || Pressure Switches **Price**: €963.9600 **Stock**: 10+ **Lead Time**: 43 days (indicative) ## Specifications | Parameter | Value | |---|---| | Svhc | Lead (04-Feb-2026) | | Deadband Max | 6psi | | Deadband Min | 0.7psi | | Pressure Type | Gauge | | Product Range | PSW-850 Series | | Sensor Mounting | Panel / Chassis | | Pressure Port Size | 1/4" | | Pressure Port Type | 1/4" FNPT | | Contact Configuration | DPDT | | Switching Current Max | 15A | | Switching Voltage Max | 480VAC | | Operating Pressure Max | 50psi | | Operating Pressure Min | 0psi | | Pressure Fitting Style | 1/4" FNPT | | Operating Temperature Max | 70°C | | Operating Temperature Min | -40°C | | Transducer Connection / Termination | 3x 7/8" Knockouts | ## Datasheet 📄 [Download PDF](https://novapart.co/datasheet/farnell:3867914/) ## _**General purpose controls with choice of dual or triple switches**_ ## _**30 inhg Vacuum to 3000 psi**_ ## _**psw-850 series**_ U **2- or 3-Switch Outputs— Can be Separated Up to 100% of Range** U **Adjustable Pressure Ranges** U **NEMA 1 Enclosure** The PSW-850 is a simple, economical control for processes that require multiple switching capabilities. Dual or triple switch controls provide multi-outputs in applications such as alarm and shutdown, pre-alarm and alarm, high/low limit, and level staging functions. Triple-switch models have been used for liquid level control. In this application, 3 pressure settings correspond to “pumping out” elevations in a sump pump. ## **SPECIFICATIONS** **Approvals:** UL, CE compliant **Storage Temperature:** -54 to 71°C (-67 to 158°F) **Ambient Temperature:** -40 to 70°C (-40 to 160°F), except model PSW-852A: -40 to 70°C (0 to 160°F); setpoint typically shifts less than 1% of range for a 30°C (54°F) ambient temperature change **Setpoint Repeatability:** ±2% of adjustable range, except model PSW-852E: ±3% of adjustable range **Shock:** Setpoint repeats after 15 g, 10 ms duration **Vibration:** Setpoint repeats after 2.5 g, 5 to 500 Hz **Enclosure:** Die-cast aluminum, epoxy powder coated, gasketed, captive cover screws **Enclosure Dimensions:** 102 H x 125 W x 140 mm D (4 x 4.9 x 5.5"); 210 mm (8.25") maximum height with pressure port **Enclosure Classification:** with NEMA 1 requirements **Enclosure Classification:** Complies **Switch Output:** 2 or 3 SPDT; switches can be separated up to 100%, except models PSW-852A and PSW-852B: 30%; switches can be wired “normally open” or “normally closed” **==> picture [63 x 23] intentionally omitted <==** **----- Start of picture text -----**
PSW-853CJ,
shown smaller
than actual size.
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**Electrical Rating:** 15 A 125/250/480 Vac resistive **Weight:** Approx. 1.4 to 3.4 kg (3 to 7.5 lb) (varies with model) **Electrical Connection:** Three 22 mm ([7] ⁄8") diameter knockouts **Pressure Connection:**[1] ⁄4 FNPT except model PSW-852A:[1] ⁄2 FNPT **H-27** ## _**General purpose controls with choice of dual or triple switches**_ **==> picture [603 x 690] intentionally omitted <==** **----- Start of picture text -----**
To Order
RANgE
DEADbAND PROOF
STANDARD METRIC
MODEL NO. STANDARD UNITS PRESSURE SWITCH
DUAL SETPOINTS, FIxED DEADbAND, bUNA-N DIAPHRAgM, O-RINg, [1] ⁄2 FNPT ALUMINUM PRESSURE CONNECTION
PSW-852AA -300 to 0 inH2O -747 to 0 mbar 0.2 to 8 inH2O 100 psi (2)15 A SPDT
PSW-852Ab -10 to 10 inH2O -25 to 25 mbar 0.1 to 0.6 inH2O 100 psi (2)15 A SPDT
PSW-852AC -50 to 50 inH2O -125 to 125 mbar 0.1 to 3 inH2O 100 psi (2)15 A SPDT
PSW-852AD 0.5 to 5 inH2O 1.25 to 12.5 mbar 0.1 to 0.3 inH2O 100 psi (2)15 A SPDT
PSW-852AE 2.5 to 50 inH2O 6 to 125 mbar 0.1 to 0.8 inH2O 100 psi (2)15 A SPDT
PSW-852AF 10 to 250 inH2O 25 to 622 mbar 0.1 to 8 inH2O 100 psi (2)15 A SPDT
DUAL SETPOINTS, FIxED DEADbAND, 316 SS DIAPHRAgM, FKM O-RINg, [1][⁄] 4 [FNPT] 316L SS PRESSURE CONNECTION
PSW-852bI 0 to 20 psi 0 to 1.4 bar 0.2 to 4 psi 225 psi (2)15 A SPDT
PSW-852bK 0 to 50 psi 0 to 3.4 bar 0.7 to 6 psi 225 psi (2)15 A SPDT
PSW-852bL 0 to 100 psi 0 to 6.9 bar 1 to 7 psi 225 psi (2)15 A SPDT
DUAL SETPOINTS, FIxED DEADbAND, SEALED bRASS bELLOWS, [1][⁄] 4 [FNPT] NICKEL-PLATED H
bRASS PRESSURE CONNECTION
PSW-852CH 30 inHg vac to 20 psi -1 to 1.4 bar 0.4 to 2.4 inHg 25 psi (2)15 A SPDT
PSW-852Cg 0 to 80 inH2O 0 to 200 mbar 4 to 12 inH2O 5 psi (2)15 A SPDT
PSW-852CJ 0 to 30 psi 0 to 2 bar 0.2 to 1.2 psi 40 psi (2)15 A SPDT
PSW-852CL 0 to 100 psi 0 to 6.9 bar 0.4 to 1.6 psi 125 psi (2)15 A SPDT
PSW-852CM 0 to 200 psi 0 to 13.7 bar 0.6 to 4 psi 200 psi (2)15 A SPDT
DUAL SETPOINTS, FIxED DEADbAND, WELDED 316L SS bELLOWS, [1] ⁄4 FNPT PRESSURE CONNECTION
PSW-852DN 0 to 500 psi 0 to 34.5 bar 6 to 18 psi 575 psi (2)15 A SPDT
DUAL SETPOINTS, FIxED DEADbAND, 303 SS PISTON, bUNA-N O-RINg, [1] ⁄4 FNPT 303 SS PRESSURE CONNECTION
PSW-852EO 100 to 1000 psi 7 to 69 bar 60 to 300 psi 10,000 psi (2)15 A SPDT
PSW-852EP 200 to 3000 psi 13.8 to 206 bar 80 to 500 psi 10,000 psi (2)15 A SPDT
DUAL SETPOINTS, REFERENCE ADJUSTMENT, FIxED DEADbAND, SEALED bRASS bELLOWS, [1] ⁄4 FNPT
NICKEL-PLATED bRASS PRESSURE CONNECTION
PSW-855CH 30 inHg vac. to 20 psi -1 to 1.4 bar 0.4 to 2.4 inHg 25 psi (2)15 A SPDT
PSW-855CJ 0 to 30 psi 0 to 2 bar 0.2 to 1.2 psi 40 psi (2)15 A SPDT
PSW-855CL 0 to 100 psi 0 to 6.9 bar 0.4 to 1.6 psi 125 psi (2)15 A SPDT
PSW-855CM 0 to 200 psi 0 to 13.7 bar 0.6 to 4 psi 200 psi (2)15 A SPDT
DUAL SETPOINTS, REFERENCE ADJUSTMENT, FIxED DEADbAND, WELDED 316L SS bELLOWS,
1⁄4 FNPT 316L SS PRESSURE CONNECTION
PSW-855DN 0 to 500 psi 0 to 34 bar 6 to 18 psi 575 psi (2)15 A SPDT
THREE SETPOINTS, FIxED DEADbAND, SEALED bRASS bELLOWS, [1] ⁄4 FNPT NICKEL-PLATED bRASS
PRESSURE CONNECTION
PSW-853CH 30 inHg vac. to 20 psi -1 to 1.4 bar 0.4 to 2.4 inHg 25 psi (3)15 A SPDT
PSW-853CJ 0 to 30 psi 0 to 2 bar 0.2 to 1.2 psi 40 psi (3)15 A SPDT
PSW-853CL 0 to 100 psi 0 to 6.9 bar 0.4 to 1.6 psi 125 psi (3)15 A SPDT
PSW-853CM 0 to 200 psi 0 to 13.7 bar 0.6 to 4 psi 200 psi (3)15 A SPDT
THREE SETPOINTS, FIxED DEADbAND, WELDED 316L SS bELLOWS, [1] ⁄4 FNPT 316L SS PRESSURE CONNECTION
PSW-853DN 0 to 500 psi 0 to 34.5 bar 6 to 8 psi 575 psi (3)15 A SPDT
THREE SETPOINTS, REFERENCE ADJUSTMENT, FIxED DEADbAND, SEALED bRASS bELLOWS, [1] ⁄4 FNPT
NICKEL-PLATED bRASS PRESSURE CONNECTION
PSW-856CH 30 inHg vac to 20 psi -1 to 1.4 bar 0.4 to 2.4 inHg 25 psi (3)15 A SPDT
PSW-856CJ 0 to 30 psi 0 to 2 bar 0.2 to 1.2 psi 40 psi (3)15 A SPDT
PSW-856CL 0 to 100 psi 0 to 6.9 bar 0.4 to 1.6 psi 125 psi (3)15 A SPDT
PSW-856CM 0 to 200 psi 0 to 13.7 bar 0.6 to 4 psi 200 psi (3)15 A SPDT
THREE SETPOINTS, FIxED DEADbAND, WELDED 316L SS bELLOWS, [1] ⁄4 FNPT 316L SS PRESSURE CONNECTION
PSW-856DN 0 to 500 psi 0 to 34.5 bar 6 to 8 psi 575 psi (3)15 A SPDT
Comes complete with operator’s manual.
Ordering Example: PSW-856CJ, control switch with 3 setpoints, reference dial, sealed brass bellows, [1] ⁄4 FNPT fitting and range of 0 to 30 psi.
H-28
PRESSURE SWITCHES
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