SMD - Sensitive Air Differential Switch
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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 - 90⁰ flow - Compression Cover, CSA & FM Approved (8024206202)
- SMD 4206082 – 0.17”-12” WC Range - 90⁰ 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.: 170°F (77°C)
- Min. Ambient Temp.: -40°F (-40°C)
-
Pressure Ranges:
- 0.17" to 1" WC (4-25mm)
- 0.17" TO 6" WC (4-152mm)
- 0.17" TO 12" WC (4-304mm)
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Connection types:
- Compression Fitting
- 1/8" NPT
- 1/4" Hose Barb
