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521-1 Differential Pressure Meter

521-1 Differential Pressure Velocity Meter 0...100 hPa / +-0.2 % fsv.
521-2 Differential Pressure Velocity Meter 0...100 hPa / +-0.1 % fsv.
testo 521 differential pressure meter 0 to 100 hPa incl. battery and calibration protocol.
testo 521 differential pressure meter 0 to 2,5 hPa incl. battery and calibration protocol.
The highly accurate differential pressure meter, testo 521, with an internal pressure sensor from 0 to 100 hPa is ideal for Pitot tube measurements in the range 5 to 100 m/s.
testo 521 is available in 2 accuracy classes. testo 521-1 with an internal pressure sensor with Class 0.2, testo 521-2 with an internal pressure sensor with Class 0.1.

Differential pressure meter

Model  Description 
521-1  Differential Pressure Velocity Meter 0...100 hPa / +-0.2 % fsv
521-2  Differential Pressure Velocity Meter 0...100 hPa / +-0.1 % fsv

In the case of velocity speeds in the range from 1 to 12 m/s, you can carry out accurate measurements
using the 100 Pa probe which can be attached externally.
The measurement data can be saved according to location and analyzed on your PC or printed on site on
your Testo printer.