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The SML air pressure switch features a sensitive diaphragm to detect changes in air pressure. Easy to install and reliable, this switch is available in two range scales and with an optional neon light indicator.

Available Models:

All Models are CSA Approved, some models are also FM Approved where noted.

• SML 1210003 – .05-1 WC 1/8 NPT Connection (8221210003)
• SML 1210034 – .05-1 WC Compression Fittings(8221210034)
• SML 1210022 – .05-9 WC Compression Fittings(822121022)
• SML 4212004 – .05-9 WC CSA & FM Approved Compression Fittings(8224212004)
• SML 4212021 – .05-9 WC CSA & FM Approved Compression Fittings with Plastic Tube(8224212021)
• SML 4212025 – .05-9 WC CSA & FM Approved 1 Compression fitting and 1-14 UNS adaptor fitting(8224212025)

Features and Specifications:

• Automatic Reset
• 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, 125VA @ 125/277 VAC
• Max. Surge Pressure: 20″ W.C.
• Max. Ambient Temperature: 170F (77C)
• Min. Ambient Temperature: -40F (-40C)
• Available Pressure ranges:
  • 0.05″ to 1″ WC (1-25mm) SML8221210034
  • 0.05″ to 9″ WC (1-230mm) SML8224212021
• Connection types:
  • 1/4″ Hose Barb
  • 1/8″ NPT
  • 1/4″ Compression Fitting

Accessories:

• Compression Fittings

Resources:

• Crossroads ControlsSML Pressure Switch Datasheet
• Crossroads Controls SMLPressure SwitchInstallation Instructions
• Former Antunes Controls Literature:
• SML Air Pressure Switch Datasheet
• SML Air Pressure Switch Installation Instructions