0 µA usually indicate a dirty or failing probe

including BASO 17D

Variable Speed Compatibility: Optimized for modulating boiler systems that utilize pulse width modulation (PWM) signals for airflow control

It is designed to be swapped into your existing centrifugal blower assembly

you should utilize an adjustable dual pressure control instead

Danfoss 003Z1321 Valve 326010-701 0 µA usually indicate aThe Danfoss 003Z1321 is a high performance AB QM Pressure Independent Control Valve (PICV) designed for precision flow regulation in HVAC systems. Featuring a 1 2" connection and a flow range of 0. 25 to 1. 2 GPM, this valve eliminates the need for manual balancing by maintaining a constant differential pressure across the control orifice. This dynamic balancing valve ensures that flow remain stable despite pressure fluctuations elsewhere in the