ATEX – Explosion-proof

      ATEX pressure switches are built with an enclosure capable of containing an explosion of a specified gas, vapour or dust which may occur within it. Agency listings are required in order to market any pressure switch device as “explosion-proof.” See below for our selection of explosion-proof pressure switches.

      Back to Pressure Switches

      Explosion-proof ATEX pressure switches that are built to last

      • Stainless steel, aluminium and cast iron housings available
      • Precise quality standards from raw materials to finished explosion proof switch

      Wide range of standard models

      • SOR has a wide variety of explosion-proof switches for most applications
      • Explosion-proof housing enclosures
      • Explosion-proof hermetically sealed switch capsules

      Meets explosion-proof requirements

      • Hermetically sealed switch capsules are UL listed, CSA certified, ATEX and TestSafe (SAA) approved as an explosion-proof snap switch
      • Explosion-proof ratings for the most extreme locations

      Safety Certified to IEC 61508 (SIL)

      • Most models meet requirements for non-redundant use in SIL1 and SIL2  Safety Instrumented Systems

      Engineered to order

      • Every SOR explosion-proof pressure switch can be custom made to your exact specifications – talk to a factory Sales Engineer or your Local Representative

      Our Explosion Proof Pressure Switches are Simple to use

      • Installs without the need for special tools
      • Set it and forget it reliability
      • No charge for factory calibration
      • Self-locking setpoint adjustment

      Adjustable Dead Band Explosion Proof ATEX Pressure Switch

      PS_V3-Adjustable-Dead-Band-Explosion-Proof_1

      Models: V3
      Ranges: 5 to 1750 psi
      Certifications: Unit: CSA, SIL; Snap Switch: ATEX, CSA, TestSafe (SAA), UL
      Warranty: 3 Years

      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. The SOR V3 explosion proof, adjustable pressure switch is a popular choice in the oil & gas, power generation, petrochemical and general building maintenance industries.

      • Hermetically sealed snap switches
      • Ranges from 5 to 1750 psi
      • Set point adjustment without declassification of hazardous area

      Datasheet

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      Big Hermet – Explosion Proof, Hermetically Sealed, Pressure Switch

      Big Hermet – Explosion Proof, Hermetically Sealed, Pressure Switch

      Models: Big Hermet
      Ranges: 30 in Hg VAC to 7000 psi, 1 bar VAC to 480 bar
      Certifications: Unit: RTN, SIL, UL/CSA; Snap Switch: UL/CSA, TestSafe (SAA)
      Warranty: 3 Years

      The SOR hermetically sealed, Big Hermet is designed for mounting in a panel or on the wall when easy access is critical. The pressure sensing assembly of the Big Hermet explosion proof sealed pressure switch is identical to a conventional Static “O” Ring type switch except that the switching element assembly is hermetically sealed in a steel capsule. This versatile pressure switch works in a wide variety of process media and industrial applications and is provided with the maximum explosion proof rating.

      • Hermetically sealed snap switches
      • Ranges from 30 in Hg vacuum to 7000 psi
      • Set point adjustment without declassification of hazardous area
      • Worldwide agency approvals

      Datasheet

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      Bourdon Tube – Explosion Proof Pressure Switch

      PS_LC-Bourdon-Tube-Explosion-Proof

      Models: 401LC, 401TA
      Ranges: 1000 to 10,000 psi
      Warranty: 3 Years

      Designed to work in extremely high-pressure applications, the explosion proof SOR bourdon tube pressure switch is well suited for pressures up to 10,000 psi in hazardous locations, particularly when high repeatability and narrow dead band are required. Wetted materials of 316SS provide excellent resistance to corrosive media and an integral snubber protects the pressure-sensing assembly from pressure surges. Typical applications for our bourdon tube product include the oil & gas and power generation industries.

        • Rugged construction
        • 316SS wetted parts
        • Easily adjustable set points

      Datasheet

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      Dual Hi-Lo – Explosion Proof ATEX Sealed Pressure Switch

      PS_V2-Dual-Hi-Lo-Explosion-Proof2

      Models: V2
      Ranges: 30 in Hg VAC to 4000 psi, 1 bar VAC to 275 bar
      Certifications: Unit: CSA, RTN, SIL; Snap Switch ATEX, Testsafe(SAA), UL/CSA
      Warranty: 3 Years

      The SOR V2 explosion proof sealed pressure switch features two discrete sensing assemblies and 2 separate set points with 2 separate hermetically sealed switches in a single housing. It can be calibrated to the same actuation point or split to the full span of the adjustable range without interaction. It is ideal for use in hostile environments and an explosion proof rating is available.

      Popular for use in alarm systems, the Dual Hi-Lo can signal at minimum and/or maximum pressure. It is field adjustable making it a convenient choice for just about any industry.

      • Explosion proof, hermetically sealed snap switches
      • Ranges from 30 in Hg vacuum to 4000 psi
      • Set point adjustment with calibrated scale
      • Set point adjustment without declassification of hazardous area

      Datasheet

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      Explosion Proof Pressure Switch

      PS_6L-Explosion-Proof_1

      Models: L, LC, S, SC, TA
      Ranges: 30 in Hg VAC to 7000 psi, 1 bar VAC to 480 bar
      Certifications: Unit: INMETRO, RTN, SIL, UL (as an outlet box)
      Warranty: 3 Years

      The SOR explosion proof pressure/vacuum/compound switch is manufactured to withstand the rigors of hostile environments. It is a rugged, field-mounted unit that is made of cast iron and works well for vacuum or positive pressure. This low-cost workhorse performs well, even under very low set points.

      • Rugged construction
      • Low cost
      • Ranges from 30 in Hg vacuum to 7000 psi
      • Set point adjustment with calibrated scale

      Datasheet

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      Explosion Proof UL CSA ATEX Pressure Switch UL CSA ATEX

      PS_B3-Explosion-Proof_1

      Models: B3
      Ranges: 30 in Hg VAC to 7000 psi, 1 bar VAC to 480 bar
      Certifications: Unit: ATEX, GOST, INMETRO, RTN, SIL, UL/CSA
      Warranty: 3 Years

      The SOR explosion proof B3 pressure/vacuum/compound switch is certified by ATEX, CSA and UL to withstand the rigors of hostile environments. These rugged, field-mounted units are made of cast iron or aluminum.

      • Terminal block connections
      • Ranges from 30 in Hg vacuum to 7000 psi
      • Set point adjustment with calibrated scale
      • Set points can be adjusted without declassification of hazardous area

      Datasheet

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      Mini-Hermet – Explosion Proof ATEX Pressure / Compound Pressure Switch

      PS_Mini-Hermet1

      Models: Mini-Hermet
      Ranges: 30 in Hg VAC to 7000 psi, 1 bar VAC to 480 bar
      Certifications: Unit: ATEX, UL/CSA, GOST, INMETRO, RTN, SIL; Snap Switch: ATEX, TestSafe (SAA), UL/CSA
      Warranty: 3 Years

      Process pressure changes act on the diaphragm/piston assembly to actuate and de-actuate a snap-action electrical switching element at discrete process pressures. The pressure sensing element of the explosion proof Mini-Hermet pressure/compound pressure switch is a force-balanced, piston-actuated assembly sealed by the conventional Static “O” Ring type that SOR pioneered. The switching element assembly is hermetically sealed in a stainless steel capsule with the maximum explosion proof rating.

      The small, compact size of the SOR Mini-Hermet makes it extremely popular in offshore oil and gas fields because it doesn’t require much space on the skids and it is corrosion resistant.

      • Hermetically sealed snap switches
      • Ranges from 30 in Hg vacuum to 7000 psi
      • Set point adjustment without declassification of hazardous area
      • Worldwide agency approval

      Datasheet

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      Pivot Seal – Explosion Proof Pressure Switch

      PS_Pivot-Seal-Explosion-Proof_1

      Models: Various
      Ranges: 100 to 7000 psi (7 to 480 bar)
      Certifications: Unit: ATEX, RTN, SIL, UL/CSA; Snap Switch: ATEX, TestSafe (SAA), UL/CSA
      Warranty: 3 Years

      The pressure-sensing element of the explosion proof pivot seal pressure switch is a force-balanced, piston-actuated assembly sealed by an o-ring.

      As with all SOR pressure switches, the travel of the piston to actuate the micro switch is only several thousandths of an inch, resulting in minimal o-ring wear. Media pressure on the area of the piston counteracts the force of the piston spring (adjustable by the adjusting nut screw) and moves the piston shaft and the force transmitter to directly actuate the electrical snap-action switching element.

      • Long lasting due to minimal wear
      • Designed for fluid power or hydraulic processes

      Datasheet

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      Sub Mini Hermet – Explosion Proof ATEX Pressure Switch

      OEM Pressure Switches

      PS_Sub-Mini-Hermet

      Models: Sub Mini Hermet
      Ranges: 8 to 200 psi, 0.5 to 14 bar (adjustable); 0.6 to 500 psi, 0.4 to 35 bar (factory set)
      Certifications: Unit: RTN, SIL; Snap Switch: ATEX, TestSafe (SAA), UL/CSA
      Warranty: 3 Years

      The Sub Mini Hermet comes in Adjustable and Factory Set models. The adjustable model can be externally adjusted without disconnecting electrical service. This field mounted instrument is suited for compact areas and the harshest hostile environments

      • Hermetically sealed snap switch
      • Ranges from 8 to 200 psi (adjustable)
      • Ranges from 6-500 psi (factory set)
      • Set point adjustment without declassification of hazardous areas
      • 316 SS housing contains explosion proof hermetically sealed switching element

      Datasheet

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      Certifying Agencies

      ATEX (certified by Baseefa, DEMKO, or KEMA)

      CE

      CSA

      FM

      GOST

      IECEx (certified by Baseefa or Standards Australia)

      INMETRO

      PESO (CCOE – India)

      TIIS

      KOSHA

      Rostechnadzor (RTN)

      SIL, TestSafe (SAA – Australia)

      SASO

      UL

      Available Listings

      Ordinary Locations and Hazardous Locations
      SIL Level Switch Certificate
      SIL Pressure Switch Certificate

      Available Hazardous Locations Protection Methods

      Explosion Proof/Flameproof (d)
      Intrinsic Safety (ia)
      Encapsulation (m)
      Special Protection (s)
      Combustible Dust (tD)
      Energy Limited (nL)

      Division 1, Division 2
      Class I, Class II, Class III
      Groups A-G

      IECEX
      saso
      INMETRO
      kosha
      gost
      PESO
      Testsafe
      atex-certification
      FM-Approval
      ul certification
      TIIS
      csa