The Testo 6450 series compressed air flow meter allows an accurate measurement of compressed air consumption, enabling energy-saving potential to be identified and costs lowered. The compressed air meters can also be used for the targeted implementation of environmental management. Another application for the 6450 series is leakage monitoring in a compressed air system. The compressed air meter can also be used to carry out a peak load analysis in order to determine whether compressed air of sufficient capacity is being generated.

The "all-in-one sensor" records compressed air consumption and the temperature as well as the pressure, eliminating the need for a separate pressure measurement. The Testo 6450 series utilizes the calorimetric measurement principle, making any additional pressure and temperature measurement redundant, and is not subject to wear on moving parts.

Four sizes are available from ½in to 2in with flow ranges from 0.25-75 m³/h to 2.3-700 m³/h. Temperature measurement range is -10 to 60°C (14 to 140°F) with pressure measurement range of -1 to 16 bar. The instrument provides four measurement parameters in one device: flow-through, totalizer, temperature, and operating pressure. Output is via 2x 4-20mA analog signals with a 1.44in color display.