e Explosion Proof Differential Pressure Switches

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, vapor 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 in order to market the device as “explosion proof.”

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
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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
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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
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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
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Low Range – Explosion Proof Differential Pressure 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
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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
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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
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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
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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 switch 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
  • Set point adjustment is self-locking
  • No charge for factory calibration.
  • 3 year warranty
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