Includes protective cap, battery, and calibration protocol Testo 511 measures absolute pressure with an accuracy of ±3 hPa. By entering the altitude above sea level, it can automatically calculate barometric air pressure.
Additionally, barometric altitude measurement between two points is possible.

• Measures absolute pressure, e.g. for absolute pressure compensation when measuring flow velocity using a Pitot tube
• Illuminated display
• Selectable units: hPa, mbar, Pa, mmH₂O, mmHg, inH₂O, inHg, psi, m, ft

Measurement range 0 … 200 hPa, acoustic alarm, carrying bag, silicone connecting hose, factory calibration protocol, 3 x AA batteries

Simple, fast, and accurate differential pressure measurement (0…200 hPa) for checking filters and Pitot tube measurement in the ventilation duct.

Reliable measurement results thanks to the position-independent differential pressure sensor with high accuracy.

Fast setup in the app (channel), graphical history, second screen, and storage of measurement data in the testo Smart App.

Volume flow calculation in the measuring device and the app.

The compact testo 512-1 differential pressure measuring instrument (0…200 hPa) is the ideal solution for simple, fast, and accurate measurement of gas flow and gas static pressure in heating systems, for checking filters in air conditioning systems, and for Pitot tube measurement in ventilation ducts. The testo Smart App supports useful functions such as configuration, display (also as a second screen), and saving, as well as documenting the measured values directly in the app.