Cleveland Controls RFS-4300-111 Pressure Switch

For veteran technicians and contractors requiring precise low-pressure air monitoring, the Cleveland Controls RFS-4300-111 Pressure Switch provides a rugged, field-adjustable solution for HVAC and energy management applications. This high-reliability low air flow switch is engineered to sense positive, negative, or differential air pressure within a critical adjustable range of 0.15" w.c. to 2.0" w.c.. Designed with a silicone diaphragm and a snap-acting SPDT switch, the RFS-4300-111 is factory-calibrated to change contacts on decreasing pressure at 0.15" w.c. (± .05"), making it an ideal choice for HVAC proving switches in rooftop units, VAV boxes, and fan coil systems. The plated housing and 1/2" conduit enclosure ensure durability in harsh mechanical environments, supporting a pilot duty rating of 300 VA and up to 15 Amps non-inductive. With its compact footprint and 1/4" quick-connect terminals, this adjustable air switch simplifies air pressure switch replacement while maintaining a 1/2 PSI maximum pressure rating for safe, continuous operation.

• Broad Compatibility: Functions seamlessly as a differential air pressure switch for monitoring filter status or fan performance.
• Precision Calibration: Reliable setpoint accuracy of ± 0.05" w.c. ensures precise low-flow detection.
• Robust Build: Plated metal housing and a high-cycle silicone diaphragm withstand temperatures from -40°F to 180°F.
• Flexible Installation: Features five knockouts for conduit and accepts various sample line connections for rigid or flexible tubing.

How do I adjust the setpoint on the RFS-4300-111?
Technicians can field-adjust the setpoint within the 0.15" to 2.0" w.c. range by turning the internal calibration screw. Always use a calibrated manometer to verify the exact trip point after adjustment.

What media is this switch compatible with?
This model is designed for use with air or combustion by-products that are non-corrosive to the silicone diaphragm and plated housing.

Can it be used for positive or negative pressure?
Yes, the dual-port design allows for positive, negative (vacuum), or differential pressure sensing depending on how the "High" and "Low" sample lines are connected.

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.