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typically in HVAC or industrial automation environments
Built for high-cycle reliability in commercial and residential applications
Precise Duct Integration: The adjustable probe length and included mounting flange permit accurate positioning in the center of the airflow for high-accuracy readings
ensuring the system resets during power loss to prevent overheating or unauthorized flow
Schneider Electric (Barber Colman) MK4-3121 Actuator 30067439-890 typically in HVAC or industrialThe Schneider Electric MK4 3121 is a commercial grade pneumatic damper actuator engineered for precise proportional control in complex HVACR systems. Designed as a direct successor in the Barber Colman lineage, this unit features a rugged die cast aluminum housing and a high performance beaded molded neoprene diaphragm for maximum durability. It operates within an 8 to 13 psi spring range and includes a factory installed positive positioner