Air Monitor Corporation 50578 K33-E11 Pressure and Flow Transmitter

Air Monitor Veltron DPT Pressure & Flow Transmitter, model 50578, also listed as K33-E11, is a differential pressure transmitter designed to measure airflow by sensing the pressure drop across a flow element and converting it into a signal used for calculating air movement in HVAC and process environments. It sits within Air Monitor’s Veltron DPT family of differential pressure transmitters, which feature auto-zero to minimize zero drift and are commonly paired with VOLU-probe pitot stations or FAN-E flow stations to achieve accurate duct and air‑handling measurements. Typical applications include monitoring supply and return ducts, fan inlets, VAV boxes, and dampers, where precise differential pressure readings translate into reliable flow data. Across Air Monitor’s differential pressure transmitter lineup, reported accuracy ranges from 0.5% to 0.1% of reading depending on configuration and installation, reflecting the system’s emphasis on high-precision airflow measurement in both HVAC and industrial settings.