Cleveland Controls RFS-4100-021 Pressure Switch

The Cleveland Controls RFS-4100-021 Pressure Switch is a high-performance adjustable pressure switch designed for air monitoring in HVAC and industrial systems. Specifically engineered to change contacts on increasing pressure, this OEM pressure switch features a versatile setpoint range of 0.15" w.c. ± .02" to 5.0" w.c. Built for reliability in demanding airflow applications, it supports a maximum pressure of 0.5 PSI (1/2 PSI) and is compatible with 120-277Vac electrical configurations. This HVAC pressure switch is essential for verifying fan operation, monitoring filter status, and ensuring proper static pressure in air handling units. Its durable construction makes it an ideal industrial pressure switch for contractors requiring precision calibration and long-term stability in mechanical ventilation environments.

Key Benefits:

• Wide Adjustment Range: Field-adjustable from 0.15" to 5.0" WC, providing the flexibility needed for various static pressure requirements.
• Multi-Voltage Compatibility: Rated for 120-277Vac, simplifying inventory by covering most commercial and industrial power setups.
• High Precision: Maintains an accuracy of ± .02" w.c. at the lower end of the scale, ensuring responsive safety interlocking.
• Robust Construction: Engineered with high-quality diaphragm materials to withstand repeated cycling in blowers and air handlers.

Common Questions:

How do you adjust the setpoint on the RFS-4100-021?
The setpoint is adjusted via the internal adjustment screw; turning it clockwise increases the pressure required to actuate the switch.

Can this switch be used for differential pressure sensing?
Yes, by utilizing both the high and low-pressure ports, it can monitor the pressure drop across filters or coils.

What is the maximum pressure rating for this unit?
The unit is rated for a maximum of 0.5 PSI; exceeding this limit may damage the internal diaphragm and affect calibration.

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.