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If there is no continuity (the circuit is open) at room temperature
High-Precision Monitoring: Features ±3% accuracy across the full 0-100% RH range to satisfy demanding climate control requirements
High-Torque Performance: Delivers 1/3 horsepower at 115 Volts
the internal orifice and linkage may be worn
Dwyer Instruments 530 Switch 320074-702 If there is no continuityThe Dwyer Instruments 530 Switch is a technician grade air flow switch engineered for precision monitoring in HVAC R duct work. This vane operated flow switch features a rugged die cast zinc body and a stainless steel vane designed for durability and long term sensitivity. It is field adjustable from 400 to 1600 FPM, allowing for precise set point calibration in various system configurations. The integrated SPDT snap switch provides reliable signaling
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