Model Series
V3Adjustable dead band explosion-proof pressure switch
Product page
SOR
V3 Adjustable Dead Band Explosion Proof Pressure Switch
The SOR V3 adjustable dead band, explosion-proof pressure switch is designed for use in hazardous locations where a wide, adjustable dead band between set points is required. Ideal for pump control and air compressors, the dead band pressure switch can be set wider to reduce the on/off frequency, thereby preventing premature wear-out.
Hermetically sealed snap switches
Adjustable pressure ranges from 5 to 1750 psi
Set point adjustment without declassification of hazardous area
Wide adjustable dead band prevents pump and compressor wear-out
Ready for quotationShare your range, connection and case requirement.
Talk to ATHModelSOR V3 Series
Pressure ranges5 to 1750 psi (adjustable dead band)
CertificationsUnit: SIL 2 | Snap Switch: ATEX, CSA, TestSafe (SAA), UL, UKCA
Warranty3-Year Limited Warranty
Housing / RatingExplosion-proof, hazardous locations (NEMA 4, 4X, 7, 9 / IP66)
ApplicationsPump control, air compressors, oil & gas, power generation, petrochemical
Technical data
Selection and ordering reference
Use this guide to identify the appropriate SOR V3 explosion-proof pressure switch configuration, including pressure range, housing type, switching element, and diaphragm materials.
Pressure range5 to 1750 psi
Housing ratingExplosion Proof / SIL 2
Dead bandWide Adjustable
Warranty3-Year Limited
Pressure Ranges
Range 25 to 25 psi0.35 to 1.7 bar
Range 312 to 100 psi0.8 to 7.0 bar
Range 440 to 200 psi2.8 to 14 bar
Range 5100 to 500 psi7.0 to 35 bar
Range 6250 to 1000 psi17 to 70 bar
Range 7400 to 1750 psi28 to 120 bar
Switching Elements
A1SPDT Snap switch15A @ 250 VAC / 0.4A @ 125 VDC
AA1DPDT Snap switch15A @ 250 VAC / 0.4A @ 125 VDC
J1SPDT Hermetically sealed11A @ 250 VAC
JJ1DPDT Hermetically sealed11A @ 250 VAC
B3SPDT Gold contactsLow power / intrinsically safe
Housing / Enclosure
N4Cast aluminum explosion-proofNEMA 4, 4X, 7, 9 / IP66
SS316 Stainless steel explosion-proofCorrosive & offshore service
Diaphragm & O-Ring Materials
F1A316L SS diaphragm / Viton O-ringGeneral hydrocarbon & chemical service
B1ABuna-N diaphragm / Buna-N O-ringStandard industrial & air service
T1ATeflon (PTFE) diaphragm / Viton O-ringAggressive chemicals
M1AMonel diaphragm / Viton O-ringSour gas & marine service
H1AHastelloy C diaphragm / Viton O-ringSevere corrosive applications
Process & Electrical Connections
P11/4" NPT FemaleStandard process connection
P21/2" NPT FemaleOptional process connection
E13/4" NPT FemaleElectrical conduit connection
Part number example
V3-K45-N4-F1A
V3ModelAdjustable Dead Band Switch
K45Range & Switch40 to 200 psi / SPDT Hermetic
N4HousingExplosion-Proof NEMA 4/7/9
F1AWetted Material316L SS / Viton
Technical specifications
Pressure ranges5 to 1750 psi (0.35 to 120 bar)
Dead band adjustmentContinuously adjustable across working range
Repeatability±1% of full span
CertificationsUnit: SIL 2 | Snap Switch: ATEX, CSA, TestSafe (SAA), UL, UKCA
Housing ratingExplosion-proof (NEMA 4, 4X, 7, 9 / IP66)
Temperature limitsAmbient -30 °F to 180 °F (-34 °C to 82 °C)
Warranty3 Years Limited Warranty
Operating notes
Set point adjustment is easily performed without declassifying the hazardous location.
Wide dead band is specifically engineered to reduce pump and compressor cycling wear.
Hermetically sealed snap switches prevent oxidation, corrosion, and contact contamination.
Unit meets SIL 2 requirements for safety instrumented systems.
Product Description
The SOR V3 adjustable dead band, explosion-proof pressure switch is engineered for hazardous locations where independent adjustment of set point and reset point is required. It is an industry standard for pump control and air compressors, allowing users to widen the dead band and dramatically reduce cycling frequency, avoiding premature mechanical and electrical fatigue.
Featuring hermetically sealed snap switches, rugged explosion-proof enclosures, and SIL 2 functional safety certification, the SOR V3 delivers dependable performance in corrosive, outdoor, and classified industrial environments.
Hermetically sealed snap switches for maximum reliability in hazardous atmospheres
Broad pressure range spans from 5 to 1750 psi across multiple sensor mechanisms
Set point adjustment performed safely without declassifying the hazardous area
Wide adjustable dead band minimizes start/stop cycles for pumps and compressors
Proven reliability across oil & gas, petrochemical, power generation, and water facilities
Ordering & Range Information
ModelV3 = Adjustable Dead Band Explosion Proof Pressure Switch
Pressure RangesRange 2 (5-25 psi), Range 3 (12-100 psi), Range 4 (40-200 psi), Range 5 (100-500 psi), Range 6 (250-1000 psi), Range 7 (400-1750 psi)
Switching ElementsSPDT & DPDT hermetically sealed snap switches (standard, high AC/DC ratings, and gold contact low power options)
Housing OptionsCast aluminum explosion-proof enclosure (NEMA 4, 4X, 7, 9 / IP66), optional 316 stainless steel housing
Wetted Materials316L Stainless Steel, Buna-N, Viton, Teflon (PTFE), Monel, Hastelloy C diaphragms and O-rings
Connections1/4" NPT(F) standard, 1/2" NPT(F) process connections; 3/4" NPT(F) electrical conduit
Part Number Example
ExampleV3-K45-N4-F1A
ModelV3 = Adjustable Dead Band Pressure Switch
Sensor & SwitchK45 = Range 40 to 200 psi with SPDT Hermetically Sealed Snap Switch
HousingN4 = Explosion-Proof NEMA 4, 4X, 7, 9 / IP66 Enclosure
Diaphragm & O-RingF1A = 316L Stainless Steel Diaphragm / Viton O-Ring
Product Specifications
Pressure ranges5 to 1750 psi (0.35 to 120 bar)
Repeatability±1% of full span
Dead bandFully adjustable across working range to optimize cycle rates
CertificationsUnit: SIL 2 | Snap Switch: ATEX, CSA, TestSafe (SAA), UL, UKCA
Temperature ratingAmbient: -30 °F to 180 °F (-34 °C to 82 °C); Process: up to 400 °F with appropriate diaphragm/seal
WarrantySOR 3-Year Limited Warranty
Operating & Application Notes
Calibration and dead band adjustments can be performed in the field without declassifying the hazardous location.
Wider dead band settings protect pumps, compressors, and motor starters from rapid cycling, lowering operational costs and maintenance downtime.
Hermetically sealed switch contacts isolate switching action from hostile atmospheres.
SIL 2 capability supports integration into safety instrumented systems.
Consult ATH Performance for exact model configuration, diaphragm compatibility, and rapid quoting.