Differential pressure controllers
These HVAC controllers control differential pressure or air volume flow. Air velocity control is also possible in combination with a pitot tube. HPSP, DPSP and SPS2 series control EC fans or AC fan speed controllers. HPSA and DPSA series control damper actuators. Typically these products are used to guarantee a constant volume flow under fluctuating demands or to maintain a difference in air pressure between two rooms. All parameters can be adjusted via Modbus RTU.
