Cleveland Controls DDP-109 Sensing Switch

The Cleveland Controls DDP-109 is a heavy-duty dual air pressure sensing switch designed for precision in HVAC and energy management systems. Engineered with two independently adjustable SPDT snap-acting switches on a single foot bracket, this unit allows technicians to establish a custom deadband for complex control circuits. With a field-adjustable set point range from 0.05" to 2.0" w.c., it specifically targets applications requiring both high and low actuation points from a single or dual pressure source. The plated housing protects a silicone diaphragm and calibration spring, ensuring reliable performance in sensing differential air pressure. Each switch element supports a 15A non-inductive load at 277 VAC, making it a robust choice for proving airflow in duct heaters, ovens, and sophisticated ventilation systems. For accurate low-point activation, the DDP-109 must be surface-mounted with the diaphragm in a vertical plane, utilizing the integrated 1/4" OD metallic tubing compression fittings for leak-proof sampling.

• Dual Independent Adjustability: Two separate SPDT switches allow for precise high/low limit settings and deadband control within a single device.
• Wide Compatibility: Works with positive, negative, or differential pressure samples using a common high-pressure port and dual low-pressure inlets.
• Contractor-Grade Durability: Features zinc-plated steel housings and a 100,000-cycle minimum life at maximum rated electrical load.
• High Electrical Capacity: 15A resistive rating and 300VA pilot duty at 115-277 VAC accommodate standard industrial and commercial control voltages.

• How do I set the deadband on the DDP-109? Since each of the two switches is adjusted independently via its own calibration screw, you can create a deadband by setting one switch to your lower limit and the other to your upper limit.
• What mounting orientation is required? To maintain the specified 0.05" w.c. minimum set point accuracy, the switch must be mounted so the diaphragm is in a vertical plane.
• Can this switch be used with flexible tubing? While it comes standard with 1/4" compression fittings for rigid tubing, slip-on adapters are available for flexible plastic tubing applications.

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.