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The SMD is a sensitive air differentiator that is compact, easy to install, accurate, and reliable. Made of sheet metal, this switch monitors positive, vacuum, or differential air pressure.

Models:

All switches are CSA and ULC Approved, models are also FM Approved where specified.

• SMD 1204007 0.17-6″ WC Range – 1/8 NPT Standard Bracket (8021204007)
• SMD 1206021 0.17-12 WC Range – Compression Fittings including Plastic Tubing, (8021206021)
• SMD 1206060 0.17-12 WC Range – Compression fitting, (8021206060)
• SMD 1205256 0.17-12 WC Range – No enclosure, Compression Fittings not included – SPDT, (8021205256)
• SMD 1206255 – 0.17″-12″ WC Range – 1/4″ NPT & 1/8″ NPT – SPDT (8021206255)
• SMD 4204025 0.17-6 WC Range – 1/4″ Standard Compression fitting, CSA & FM Approved (8024204045)
• SMD 4204107 0.17-6 WC Range – Adaptor Fitting: 1/8 ID 1 OD, CSA & FM Approved (8024204107)
• SMD 4206202 0.17-12 WC Range – 90 flow – Compression Cover, CSA & FM Approved (8024206202)
• SMD 4206082 0.17-12 WC Range – 90 Standard Compression fitting, CSA & FM Approved (8024206082)
• SMD 3501189 Preset to 0.25 WC – Hose Barb fitting (8023501189)
• SMD 3501190 Preset to 0.30 WC – Hose Barb fitting (8023501190)

Features and Specifications:

• Sensitive diaphragm
• Snap-action electrical switch, S.P.D.T. rated at 10 amps
• Electrical Ratings:
• 10A @ 125 VAC.; 8A @ 250 VAC.; 7A @ 277 VAC.;
• 1/8HP @ 125 VAC.; 1/4HP @ 250 VAC.
• Pilot Duty, 125 VA @ 125/277 VAC.
• Max. Surge Pressure: 20″ W.C.
• Max. Ambient Temp.: 170F (77C)
• Min. Ambient Temp.: -40F (-40C)
• Pressure Ranges:
  • 0.17″ to 1″ WC (4-25mm)
  • 0.17″ TO 6″ WC (4-152mm)
  • 0.17″ TO 12″ WC (4-304mm)
• Connection types:
  • Compression Fitting
  • 1/8″ NPT
  • 1/4″ Hose Barb

Accessories:

• Compression Fittings

Resources:

• Crossroads ControlsSMD Pressure Switch Datasheet
• Crossroads Controls SMD Pressure SwitchInstallation Instructions
• Former Antunes Controls Literature:
• SMD Air Differential Switch Datasheet
• SMD Air Differential Switch Installation Instructions