Resideo 50027910-001 Pressure Switch 321702-401 Optimized Airflow: Designed for systems

Optimized Airflow: Designed for systems up to 1400 CFM

Engineering for natural gas applications

localized burn marks on the PCB

While functionally similar to other valves

While the Robertshaw RS9320T can be hardwired using a 24V common wire for continuous backlighting and operation

Resideo 50027910-001 Pressure Switch 321702-401 Optimized Airflow: Designed for systemsThe Resideo 50027910 001 Pressure Switch is a high precision differential pressure switch engineered for air movement verification in HVAC and humidification systems. Designed as a direct replacement component for Honeywell TrueSTEAM models, including the HM506, HM509, and HM512, this switch ensures critical airflow is confirmed before the steam humidifier engages. For pros in the field, this means protecting the heat exchanger and ductwork from