Cleveland Controls DDP-109-318 Sensing Switch

The Cleveland Controls DDP-109-318 is a professional-grade Dual Pressure Sensing Switch engineered for high-precision HVAC air pressure monitoring and energy management systems. This heavy-duty differential pressure switch features two independently adjustable SPDT snap-acting switches mounted on a single foot bracket, allowing technicians to establish a precise adjustable deadband for complex control circuits. With a versatile operating range of 0.05 to 2.0 inches w.c., the DDP-109-318 excels in proving switch applications where both high and low actuation points must be monitored simultaneously. The unit is built with plated housings and silicone diaphragms to maintain calibration accuracy across a wide temperature spectrum from -40°F to 176°F. This specific 318 model includes enclosure covers to protect live 6-32 screw terminals and adjustment screws, making it a reliable choice for contractor-grade pressure control in demanding commercial environments. All sample connections are 1/4" OD compression fittings, ensuring a secure, leak-proof interface with rigid or semi-rigid tubing.

• Dual Independent Set Points: Features two separately operated SPDT switches for nuanced control of high and low pressure thresholds.
• Precise Differential Control: Supports differential pressure sensing up to 2.0" w.c. with a progressive switching differential for optimized system accuracy.
• Enhanced Terminal Protection: Equipped with dual enclosure covers that accept 1/2" conduit connections, shielding electrical connections from accidental contact.
• Rugged Construction: Durable metallic canisters and high-quality diaphragm materials ensure a long lifecycle of over 100,000 cycles.
• Flexible Mounting: The common foot bracket allows for stable surface mounting in any vertical plane to maintain the lowest specified set point.

What is the maximum electrical load for the DDP-109-318?
This switch is rated for 300 VA pilot duty at 115 to 277 Vac (60 Hz) and 5A non-inductive load, making it compatible with most standard industrial HVAC controllers.

Can I use this switch for negative pressure applications?
Yes. By utilizing the common high-pressure (H) and individual low-pressure (L) ports, you can monitor two positive samples, two negative samples, or a combination of both to sense differential pressure.

What type of tubing is required for installation?
The integral compression ferrule and nut fittings are designed for 1/4" OD rigid or semi-rigid tubing, including copper, aluminum, or plastic lines.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.