Dwyer Instruments 1640-0 Floating Contact Null Switch 0.01-0.2" WC Range

The Dwyer Instruments 1640-0 is a precision floating contact null switch from the Series 1640 line, designed for accurate differential pressure monitoring and control applications. This switch provides both high and low actuation points, making it ideal for detecting small pressure changes in HVAC systems, clean rooms, filter monitoring, and other critical air pressure applications.

Key Features:

• Pressure range: 0.01 to 0.2 inches water column ("WC)
• Floating contact design allows for flexible wiring configurations
• Null switch operation provides precise switching at setpoint
• Dual actuation capability for high and low pressure limits
• Compact, durable construction for reliable long-term performance
• Suitable for air and compatible gas applications

This pressure switch is commonly used in building automation systems, filter status monitoring, and industrial process control where detection of very low differential pressures is critical. The floating contact configuration provides versatility in control circuit design, while the sensitive 0.01-0.2"WC range makes it perfect for applications requiring detection of minimal pressure differentials.