testo 521-1, diferenčný tlakomer 0. .. 100 hPa, vrátane batérie a kalibračného protokolu
Integrated differential pressure sensor with an accuracy of 0.2 % of f.v.
Calculation of the flow velocity and the volume flow via Pitot tube (optional)
Multi-point and timed mean calculation
2 probe inputs for additional pressure and temperature probes