• Measurement of norm volume flow In the • Exchangeable fittllng: Probe removal under pressure possible (testo 6447 only) • Material selectable betwen galvanized steel and stainless steel • Sensor positioned exactly In measurement stretch with defined Inner diameter and volume flow adjustment ensure highest accuracy • Highest flexibility thanks to different signal outputs: - Pulse output - 2 switch outputs (parameterlzable: consumption or volume flow-dependent, opener, closer, hysteresis, window) • Built-in totalizer, even without additional analysis • Operating menu with LED display • Cleanable sensor The compressed air counters testo 6441 to testo 6444 are designed for the measurement, monitoring and recording of compressed air consumption, and therefore also for the determination of leakages in compressed air systems, consumption-based allocation of costs and the Implementation of peak load management. The compressed air counters testo 6441 to testo 6444 record norm volume flow according to the calorimetrie principle, which means the measurement procedure is Independent of the process pressure and does not cause a permanent pressure drop. The version testo 6447 offers everything the testo 6446 provides, In addition the removal of the probe under pressure is possible (patented screw fitting). The larger nominal values refer especially to Important compressed air pipelines, often the main supply line after • Leakage detection, compressed air consumption Consumption cost allocation Peakload management • Min./max. monitoring • Control of consumption-dependent maintenance

Subject to change without notice.

Technical drawings Subject to change without notice.

Electrical connection Current signal Current signal * If menu selection ImPR = Yes -> Pulse output If menu selection ImPR = No -> Switch output (pre-selectlon counter) Order data testo 6446, testo 6447 * Customer-specific diameter between 65 mm and 250 mm available on request Orde example for compressed air counter testo 6447 with the following options - Probe removal under pressure - Material stainless steel Subject to change without notice.