Volume flow measurement comes of age


From calibration to on-board compensation of pressure and temperature

Do you know how much is flowing here? Ventilation ducts for an industrial buildingzoom

The importance of volume flow measurements to air quality and operating costs has been underestimated for many years. Yet there is now a growing recognition that excessive volume flow in air conditioning and process air systems sends operating costs spiraling upwards. Not only do ventilator fans consume extra energy in moving the surplus air around the system but expensive air conditioning processes (cooling, heating, humidifying or dehumidifying) generate further costs by treating unnecessarily large volumes of air.

Operators and planners have recognized that too little volume flow also creates problems as it results in an inadequate air supply. Moreover, an insufficient volume flow can also lead to hygiene problems – from oxygen deficiency for humans to accelerating bacterial growth in moist, slow-moving air during production processes.

Control cabinet installation of the P 34 pressure transmitter, optimised for volume flowzoom

The measurement technology specialist halstrup-walcher identified this problem and responded immediately by offering a complete package solution:

  1. The company supplies pressure transmitters, which are perfectly tailored to the requirements of volume flow measurement, such as the newly launched P 34 differential pressure transmitter.
  2. Selection and delivery of the appropriate primary element. The key is to find the correct compromise between the available budget and the accuracy required.
  3. Volume flow calibration in an accredited laboratory: In the future it will be possible to calibrate beside primary elements also balometers, ventilators and complete test sections.

Clearly, the difference lies primarily in being able to observe all the relevant aspects of the volume flow measurement as a whole. In practical applications, the accurate, stationary (permanent) measurement of volume flow is essential for maintaining air quality and keeping operating costs under control.