Cleveland Control AFS-181-43 Switch

The Cleveland Controls AFS-181-43 is a professional-grade air flow switch engineered for high-accuracy pressure sensing in HVAC, industrial air handling, and process control applications. Functioning as a Single Pole Double Throw (SPDT switch), this unit is designed to monitor positive, negative, or differential air pressure. It features a field-adjustable setpoint range of 0.05" ± .02 to 2.0" w.c., allowing for precise calibration to meet specific system requirements. Built with a durable silicone diaphragm and a compact enclosure, the AFS-222 series derivative provides reliable 120-277Vac performance with a 15 Amp non-inductive rating. For optimal sensitivity, the device must be floor-mounted in a vertical plane, ensuring the lowest possible setpoint. Its 1/8" NPT female pipe connections accommodate standard rigid or semi-rigid tubing, making it a versatile differential pressure switch for proving fan operation or monitoring filter status in demanding mechanical environments.

• Adjustable Pressure Range: Precisely tune setpoints between 0.05" and 2.0" w.c. to match varying system static pressures.
• High Electrical Capacity: Rated for 15 Amp non-inductive loads at up to 277Vac, plus 300 VA pilot duty.
• Versatile Sensing: Capable of monitoring differential air pressure, positive pressure, or vacuum/negative pressure.
• Industrial Durability: Robust construction designed for over 100,000 cycles in temperatures ranging from -40°F to 180°F.
• Standard Installation: Features 1/8" NPT connections for reliable integration into existing pneumatic sampling lines.

How do I ensure the most accurate setpoint when installing?
To maintain the specified 0.05" w.c. sensitivity, always mount the switch with the diaphragm in a vertical position. Horizontal mounting can affect the calibration due to the weight of internal components.

Can this switch be used in combustion air applications?
Yes, the Cleveland Control AFS-181-43 is rated for air and combustion by-products that are compatible with silicone components.

Is the reset automatic or manual?
This specific model is an automatic reset air switch, meaning it will reset once the pressure returns to the differential threshold without technician intervention.

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.