Product Description
The Dwyer 1640-0 Floating Contact Null Switch is engineered for precise control of air pressure in HVAC systems. This switch utilizes a unique floating contact mechanism to ensure reliability and accuracy in monitoring pressure changes within ducts.
- Efficient SPDT switch accommodates a variety of system demands.
- Visible set point adjustment for easy calibration.
- Large diaphragm ensures low-range accuracy.
Product Highlights
Optimal for use in applications such as damper positioning and duct air control. The switch features a pressure range from 0.01 inches to 0.2 inches of water column, making it ideal for both high-sensitivity and rugged environment operations.
Product Information
Standard Information
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Service: Air and non-combustible, compatible gases.
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Temperature Limits: Minus 30 to 110 degrees Fahrenheit.
Technical Specifications
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Wetted Materials: Consult factory.
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Pressure Limits: Continuous 10 psig, surge 25 psig.
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Switch Type: Single Pole Double Throw (SPDT).
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Electrical Rating: Various ratings based on application. De-rate 70-80% for slow pressure changes.
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Process Connections: One-eighth inch female NPT.
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Mounting Orientation: Diaphragm in vertical position.
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Set Point Adjustment: Screw type.
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Weight: Four pounds thirteen ounces.
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Agency Approvals: CE marked.
