Differential pressure

These pressure transmitters measure differential pressure, air volume flow or air velocity. A typical application is to monitor differential pressure over an air filter and generate an alert in case the filter gets polluted. Another typical application is to monitor volume flow and guarantee the supply of fresh air. The measured value is transmitted via an analogue output and via a Modbus RTU register. All settings can be adjusted via Modbus RTU.

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.

Differential pressure switches detect overpressure, vacuum or differential pressure. The switching pressure setpoint can be adjusted by means of a scaled calibrated knob. A typical application is to detect a clogged air filter or to generate an alert if the air flow drops below a critical level.

Accessories for professional installation of differential pressure transmitters and controllers: transparent PVC tubes, differential pressure connection sets and pitot tubes to measure or control differential pressure, volume flow or air velocity.