We measure it. testo 6448 SPECIFICATIONS testo 6448 Shaft probe The mobile compressed air counter testo 6448 is used for the determination, monitoring, control and reporting of compressed air consumption, and thus for the determination of leakage in compressed air systems, as well as consumption-based cost allocation and peak load management. The shaft probe is optimally suited for easy, secure and fast installation, and can be used for measurements on different pipe diameters. Subject to change without notice. Compressed air counter shaft probe DN40 - DN300 An optimum drilling clamp allows exact positioning of the sensor without the need for welding work. The respective supply line can remain under pressure while installing this drilling clamp or when maintaining/replacing the sensor (normal operating conditions). An ideal ball valve allows the compressed air line to be sealed securely and air-tight for removal of the probe, or re-opened. The recoil protection guarantees highest security for the commissioner and combines three functions in one instrument: testo 6448 • Possibility of installation under pressure • Measurement of flow velocity (m/s) in the measuring range 0 to 80 m/s or 160 m/s; consumption measurement in Nm3 and media temperature in °C 1. The recoil protection, i.e. the sensor can be pushed in only one direction during installation 2. Seal against the process, i.e. thanks to an O-ring gasket, no compressed air can escape during installation 3. Positionable fixing, as a millimetre-exact penetration depth and postioning is possible, as in a car clutch • Highest flexibility thanks to different signal outputs: - Analog output 4 to 20 mA (4-wire) - Pulse output - 2 switching outputs (parameterizable: consumption or volume flow-dependent, NO, NC, hysteresis, window) Page 1/6 • Recoil protection and ball valve ensure fast and safe installation and deinstallation of the compressed air probe on site. This means several measurement sites can be covered with one shaft probe. Areas of application: • Leakage detection, compressed air consumption meaurement • Consumption cost allocation • Peakload management • Integrated totalizer, also without additional evaluation unit • Min./max. monitoring • Operating menu with LED display • Control of consumption-dependent maintenance strategies • Automatic, exact compressed air dosage 0981 8374/msp/A/01.2012 SPECIFICATIONS Status 01.01.2012 Patented recoil protection

Compressed air counter shaft probe DN40 - DN300 Technical data testo 6448 Subject to change without notice.

testo 6448 We measure it. Compressed air counter shaft probe DN40 - DN300 Subject to change without notice. 0981 8374/msp/A/01.2012 Page 3/6 Status 01.01.2012 Technical drawings

testo 6448 We measure it. Compressed air counter shaft probe DN40 - DN300 Electrical connection A Output 1 OUT 1 Output 2 OUT 2 M12 plug on instrument I Current signal D E ImP * ImP * (Switch) Hno / Hnc Fno / Fnc or ImP (Pulse) Hno / Hnc Fno / Fnc (Switch) I C Current signal L + (19 to 30 VDC) BN testo 6448 BN = WH = BK = BU = brown white black blue ImP (Pulse) WH OU T2 BK OUT 1 BU 0 VDC A/C* A/D* B/D* Wire colours for cable 0699 3393 brown white blue black Subject to change without notice. 0981 8374/msp/A/01.2012 Page 4/6 Terminal allocation 1 Supply connection 19 to 30 VDC (+) 2 OUT 2 (analog...

testo 6448 We measure it. Compressed air counter shaft probe DN40 - DN300 Order data testo 6448 AXXX configuration BXX Drilling clamp selection CXX Measurement fitting selection Examples: Order code for transmitter testo 6448 – Compressed air counter shaft probe - With transmitter incl. recoil protection - 80 m/s - With directional protection - Air (compressed air) - Without calibration - Length variant 435 mm (for DN125 to DN300) - Without drilling clamp - Without measurement fitting / without ball valve -> 0555 6448 A1 AA0 AB1 AC0 AD0 AE1 B0 C0 Order code for transmitter testo 6448 – drilling...

0981 8374/msp/A/01.2012 Page 6/6 Status 01.01.2012 testo 6448 We measure it.