or a pressure switch that fails to close despite the motor spinning

disc assemblies

it excels at maintaining stable downstream delivery in 2 PSI or 5 PSI piping systems

Does the sensing bulb require specific orientation

Veris Industries PX3DXX02 Transducer 321894-706 or a pressure switch thatThe Veris Industries PX3DXX02 Transducer is a versatile, high precision instrument engineered for differential pressure monitoring and air velocity measurement in demanding HVACR applications. As the direct replacement for PR 276 R10 MA, this model provides seamless integration into existing systems. This duct mounted unit features field selectable pressure ranges from 0 to 10" WC (0 to 2,500 Pa) and velocity ranges up to 6,000 ft min, allowing