Explosion Proof Differential Pressure Switches

      Process instrumentation industry standards define devices rated “explosion-proof” as those with an enclosure capable of withstanding an explosion of a specified gas, vapour or dust which may occur within it. They contain sparks, flashes, heat or explosion within the enclosure and prevent ignition of the surrounding area. Agency listings are required to market the device as “explosion-proof.”

       

      Modular designs for flexibility

      • Wide range of electrical enclosures to choose from
      • Rugged, high cycle rate tolerance
      • Not sensitive to vibration and high working pressures

      Long working life

      • High repeatability
      • Narrow dead band
      • Negligible temperature effect and static influence

      Safety certified to IEC 61508 (SIL)

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

      Have your switch engineered to your specifications

      • Every SOR explosion proof differential pressure switches can be custom made to your exact specifications. Talk to a factory Sales Engineer or your Local Representative

      Easy to use and low cost of ownership

      • Install them yourself – no special tools needed
      • Setpoint adjustment is self-locking
      • No charge for factory calibration.
      • Three-year warranty

      Big Hermet – Explosion Proof Differential Pressure Switch

      Big Hermet – Explosion Proof Differential Pressure Switch

      Models: Big Hermet, 101/12/1BA
      Ranges: 3 to 500 psid
      Certifications: Unit: INMETRO, RTN, SIL, UL/CSA; Snap Switch: UL/CSA, TestSafe (SAA)
      Warranty: 3 Years

      The SOR hermetically sealed, Big Hermet differential pressure switch is designed for mounting in a panel or on the wall when easy access is critical or you don’t want the switch right at the source of the pressure. The switching assembly is hermetically sealed in an explosion proof steel capsule. This versatile differential pressure switch works in a wide variety of process media and industrial applications.

      • Hermetically sealed snap switches
      • Ranges from 3 to 500 psid
      • Set point adjustment without declassification of hazardous area
      • Worldwide agency listings

      Datasheet

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      Dual Opposed Diaphragm – Explosion Proof Differential Pressure Switch

      Dual Opposed Diaphragm – Explosion Proof Differential Pressure Switch

      Models: S Housing
      Ranges: 0.5 to 1000 psid
      Certifications: Unit: INMETRO, RTN, SIL, UL: (as an outlet box)
      Warranty: 3 Years

      This versatile opposed piston type differential pressure switch from SOR is essentially two static o-ring type pressure sensors at opposite ends of a common piston shaft.  The housing is explosion proof and the switching elements are SPDT or DPDT. The S housing is available with a wide range of adjustable pressure ranges and performs best when system pressure is relatively constant. Basic models with standard wetted parts are suitable for air, oil, water and non-corrosive process fluids.

      • Ranges from 0.5 to 1000 psid
      • Set point adjustment with calibrated scale

      Datasheet

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      High Static Operation – Explosion Proof Differential Pressure Switch

      High Static Operation – Explosion Proof Differential Pressure Switch

      Models: 102AD, 103AD
      Ranges: 7 in wc to 2500 psid, 18 mbar to 175 bar
      Certifications: Unit: ATEX, CSA, GOST, INMETRO, RTN, SIL; Snap Switch: ATEX, TestSafe (SSA), UL/CSA
      Warranty: 3 Years

      These differential pressure switches are suited for low-to-high differential pressure process media or fluid power applications where high and varying static pressures, high overrange, proof, shock pressure or cycle rates are expected. They may be field-mounted and can be configured for use in non-hazardous as well as hazardous locations.

      • Negligible temperature and/or static influence
      • Hermetically sealed snap switches
      • Ranges from 7 in wc to 2500 psid
      • Set point adjustment without declassification of hazardous area
      • SPDT or DPDT switching elements

      Datasheet

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      Low Pressure Switch – Low Range Series 20 Explosion Proof Differential Switch

      Low Pressure Switch – Low Range Series 20 Explosion Proof Differential Switch

      Models: Series 20
      Ranges: 2.5 in wcd to 75 psid
      Certifications: Unit: UL (as an outlet box only), SIL
      Warranty: 3 Years

      Based on the tried and true Static “O” Ring type pressure sensor, the Low-range Series 20 explosion proof low pressure differential pressure switch can be installed in an explosion proof housing. This low pressure switch system virtually eliminates friction and resultant wear while yielding excellent repeatability in hazardous environments. Durability of the low pressure switch is further ensured through rigid quality standards that are maintained from raw materials to finished product. High accuracy and repeatability for low pressure differential pressure applications such as filter performance, dryer monitoring and purge maintenance.

      • High repeatability
      • Narrow dead band
      • Field adjustable with no special tools required
      • SIL-2 listed for S.I.S applications

      Datasheet

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      Low Pressure Switch – Low Range Series 20 Explosion Proof Differential Switch

      Low Pressure Switch – Low Range Series 20 Explosion Proof Differential Switch

      Models: 107EL
      Ranges: 0 to 40 in wd, 0 to 1000 mm wc
      Certifications: Unit: RTN, SIL; Snap Switch: ATEX, TestSafe (SAA), UL/CSA
      Warranty: 3 Years

      Designed primarily for air and clean gas applications for low pressures, this instrument accurately reads very low pressures in hazardous locations by utilizing a diaphragm with a large sensing area. The 107EL is ideal for pressurized (clean) room applications because it measures the difference between one room and another (air ducts) and lets you know if an air filter is clogged. An external set point adjustment with visual indication is standard, allowing for simplified calibration of the switch.

      • Hermetically sealed snap switches
      • Ranges from 0 to 40 in wc
      • Set point adjustment without declassification of hazardous area
      • SPDT or DPDT switching element

      Datasheet

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      Mini-Hermet – Explosion Proof Differential Pressure Switch

      Mini-Hermet – Explosion Proof Differential Pressure Switch

      Models: 101AG &121AH
      Ranges: 3 to 500 psid, 0 to 172 bar
      Certifications: Unit: GOST, INMETRO, ATEX, SIL, UL/CSA; Snap Switch: ATEX, TestSafe (SAA), UL/CSA
      Warranty: 3 Years

      These SOR explosion proof differential pressure switches are suitable for a variety of low to high differential pressure process or fluid power applications in hazardous locations where space is limited and a safe enclosure is mandatory. The switch element is a snap switch hermetically sealed in a stainless steel capsule. The maximum explosion proof rating is standard.

       

      • Ranges from 3 to 500 psid
      • Set point adjustment without declassification of hazardous area
      • Worldwide agency listings

      Datasheet

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      Single Diaphragm – Explosion Proof Differential Pressure Switch

      Single Diaphragm – Explosion Proof Differential Pressure Switch

      Models: 101L, 121L
      Ranges: 3 to 500 psid, 0.2 to 35 bar
      Certifications: Unit: INMETRO, RTN, SIL, UL (as an outlet box)
      Warranty: 3 Years

      101/121 single diaphram explosion proof differential pressure switches are suited for low-to-high differential pressure, fluid power or process applications where high and varying static pressureshigh overrange, proof, shock pressure or cycle rates are expected. They are one of the best performing differential switches and provide outstanding repeatability designed for use in non-corrosive process media, however optional components may be added for corrosive environments.

      The 101L and 121L are low-cost, rugged, field-mounted instruments incorporating a flexible modular design that provide cost effective sensing solutions. The two-piece piston design allows for complete differential pressure reversal without damage. Housings are constructed of rugged cast iron.

      • Low Cost
      • Ranges from 3 to 500 psid
      • Set point adjustment with calibrated scale
      • Versatile – several housing, switches and diaphragm options

      Datasheet

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      Single Diaphragm – Explosion Proof UL/CSA/ATEX Differential Pressure Switch

      Single Diaphragm – Explosion Proof UL/CSA/ATEX Differential Pressure Switch

      Models: 101B3/121B3
      Ranges: 3 to 500 psid, 0.2 to 35 bar
      Certifications: Unit: ATEX, INMETRO, RTN, SIL, UL/CSA
      Warranty: 3 Years

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

      • Terminal block connections
      • Ranges from 3 to 500 psid, 0.2 to 35 bar
      • Set point adjustment with calibrated scale
      • Set point adjustment without declassification of hazardous area

      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