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      Weatherproof Pressure Switches

      SOR weatherproof pressure switches are designed to be weather tight for external use. They are built to stand up to the rigors of the environment and provide long-lasting and dependable service. Diaphragm type switches are recommended for most process applications while pivot seal type weatherproof pressure switches perform best in fluid power (hydraulic) applications.

       

      Field proven for long working life

      • Aluminum, carbon steel or stainless steel housings available
      • Precise quality standards from raw materials to finished switch

      Wide range of standard models

      • SOR has a weatherproof pressure switch to fit most any application where protection from the elements is vital to your process
      • Fixed range, adjustable set points and adjustable differential models available
      • Standard wetted parts are normally suited for air, water, oil and non-corrosive process media

      Safety Certified to IEC 61508 (SIL)

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

      Engineered solutions for your applications

      • Every SOR weatherproof pressure switch can be custom made to your exact specifications – talk to a factory Sales Engineer or your local Representative
      • If your application requires a weatherproof pressure switch for use in a corrosive process, optional components can be supplied

      Simple to use

      • Easy to install and calibrate – no special tools required
      • Factory calibration is free
      • Self-locking set point adjustment

      Adjustable Dead Band – Weatherproof Pressure Switch

      Dual Hi-Lo – Weatherproof Pressure Switch

      Models: V1
      Ranges: 5 to 1750 psi
      Certifications: Unit: CSA, RTN, SIL
      Warranty: 3 Years

      he SOR V1 adjustable dead band weatherproof pressure switch is the low-cost alternative to its explosion proof counterpart. It is best used in non-hazardous locations where a wide, adjustable dead band between set points is required. The switch incorporates two industry-proven static o-ring pressure sensing elements. Media pressure on the areas of the pistons counteracts the forces of the independently adjustable piston springs and moves the piston shafts to operate the lever assembly, which in turn, actuates and de-actuates the electrical switching element.

      • Field adjustable
      • Narrow and wide adjustable dead band
      • May be used outdoors or indoors

      Datasheet

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      Bourdon Tube – Weatherproof Pressure Switch

      Bourdon Tube – Weatherproof Pressure Switch

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

      Lower cost than our weatherproof model, the SOR 401RN model bourdon tube weatherproof pressure switch is well-suited for high pressure applications in non-hazardous locations, particularly when high repeatability and narrow dead band are required. Wetted materials of 316SS provide excellent resistance to corrosive media. An integral snubber protects the pressure-sensing assembly from pressure surges.

      • Rugged construction
      • Easily adjustable set point

      Datasheet

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      Dual Hi-Lo – Weatherproof Pressure Switch

      Dual Hi-Lo – Weatherproof Pressure Switch

      Models: V1
      Ranges: 30 in Hg VAC to 4000 psi, 1 bar VAC to 275 bar
      Certifications: Unit: CSA, RTN, SIL
      Warranty: 3 Years

      The SOR weatherproof pressure switch is the lower cost alternative to the explosion proof model. It employs two discrete sensing assemblies that provide independent, adjustable, fine resolution set points that can be calibrated to the same actuation point or split to the full span of the adjustable range without interaction.

      The Dual Hi-Lo is popular for use in alarm systems configured to signal at a minimum and/or maximum pressure. The V1 is field adjustable making it a convenient choice for a wide variety of applications.

      • Dual set points
      • Ranges from 30 in Hg vacuum to 4000 psi
      • Set point adjustment with calibrated scale

      Datasheet

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      Omni Weatherproof Pressure Switch

      OEM Pressure Switches

      Omni Weatherproof Pressure Switch

      Models: Omni
      Ranges: 7 to 7000 psi, 0.5 to 480 bar
      Certifications: Unit: RTN, SIL
      Warranty: 3 Years

      Designed to provide protection from the elements, SOR’s Omni weatherproof pressure switches are available in two switch configurations – diaphragm for most applications and pivot seal type for hydraulic applications where high shock pressures and cycle rates are expected. These small, compact, low cost switches are often used in OEM applications.

      • Environmentally sealed snap switches – NEMA 4 approved
      • Aluminum with corrosion-resistant chromate conversion coating
      • Ranges from 7 to 7000 psi
      • Diaphragm and pivot seal models

      Datasheet

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      Pivot Seal – Weatherproof Pressure Switch

      Pivot Seal – Weatherproof Pressure Switch

      Models: Various
      Ranges: 100 to 7000 psi (7 to 480 bar)
      Certifications: Unit: CE, CSA, INMETRO, RTN, SIL
      Warranty: 3 Years

      The weatherproof SOR pivot seal pressure switch makes sense when you need protection from the elements but do not require the more expensive explosion proof model.

      The pressure sensing element of the pivot seal pressure switch is a force-balance, piston-actuated assembly sealed by an o-ring. As with all SOR pressure switches, the actual motion 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 range 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.

      • Designed for high pressure fluid power (hydraulic) applications
      • Able to withstand high-shock pressures
      • Perfect for high cycle rates

      Datasheet

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      Weatherproof Pressure Switch

      Weatherproof Pressure Switch

      Models: NN, N3, N4, N6, PP, P3
      Ranges: 30 in Hg VAC to 7000 psi, 1 bar VAC to 480 bar
      Certifications: Unit: CE, CSA, INMETRO, RTN, SIL
      Warranty: 3 Years

      The SOR weatherproof pressure/vacuum/compound pressure switch is one of our most popular instruments. Models with standard wetted parts are normally ideal for air, oil and non-corrosive process applications however; we can build one to handle corrosive requirements. At the heart of the this mighty SOR pressure switch is a force-balanced, piston-actuated assembly with the sensing element sealed by a flexible diaphragm and a static “o” ring. A wide variety of wetted parts are available and a metal diaphragm can be welded to the pressure port thereby eliminating the o-ring.

      • Low cost general purpose workhorse
      • Set it and forget it dependability
      • Ranges from 30 in Hg vacuum to 7000 psi
      • Set point adjustable with calibrated scale

      Datasheet

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      Weatherproof Pressure Switch with Terminal Block Connections

      Weatherproof Pressure Switch with Terminal Block Connections

      Models: RN
      Ranges: 30 in Hg VAC to 7000 psi, 1 bar VAC to 480 bar
      Certifications: Unit: ATEX, CE, CSA, INMETRO, RTN, SI
      Warranty: 3 Years

      The RN housing on this SOR weatherproof pressure switch contains a built-in terminal strip that eliminates wire leads. Installation is quick, easy and clean. SOR weatherproof pressure switches with standard wetted parts are normally suitable for nearly all non-corrosive processes however, if corrosive service is required, optional components are available and customized units can be built to fit your needs.

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

      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