testo 512 - Pressure and flow velocity measuring instrument 0 to 2 hPa

Order-Nr.  0560 5126

  • 8 measurement units to choose from: psi, kPa, hPa, Pa, mmH2O, mmHg, inH2O, inHg

  • 2 air flow units to select from: fpm, m/s

  • Integrated density compensation

  • Backlit display / min and max values / hold function

The testo 512 differential pressure meter is available in 4 different models. This model has a measuring range of 0 to 0.80 inH2O (0 to 2 hPa), and is ideal for measuring pressure differences at filters, and for carrying out pitot static tube measurements in air ducts at air flow speeds between 2 and 17.5 m/s.

Product Description

The testo 512 provides simultaneous pressure and flow measurements in one compact, versatile instrument. It offers two user-switchable units of flow, feet per minute (fpm) and meters per second (m/s). Eight different units of pressure can be selected: psi, inH2O, inHg, kPa, hPa, Pa, mmH2O, and mmHg. All readings are clearly visible on a large backlit display. The versatile testo 512 provides smoothing between 1 and 20 display refreshes (0.5 sec), yielding a sliding mean reading. Density compensation is built-in. A separate HOLD-MIN-MAX button freezes readings, and displays both flow and pressure extremes. Optional accessories include the testo IR printer for on-site documentation of all measurements by date and time, plus the clear TopSafe for protection against dirt, moisture, and impact.


Delivery Scope

testo 512 differential pressure meter (measuring range 0 to 0.80 inH2O), calibration certificate, and batteries
Differential Pressure

Measuring range

0 to +1 InH₂O / 0 to +2 hPa

+394 to +3444.9 fpm / +2 to +17.5 m/s

395 to 3445 fpm


0.5 % Fs


0.001 InH₂O / 0.001 hPa

0.1 fpm / 0.1 m/s

0.1 fpm


±4 InH₂O / ±10 hPa

General technical data


8 x 2 x 2 in. / 202 x 57 x 42 mm

Operating temperature

32° to 140 °F / 0 to +60 °C

Measuring medium

All non-corrosive gases

Seceltable units

hPa, Pa, mmH₂O, inH₂O, inHg, mmHg, kPa, psi, m/s, fpm

Battery type

9V block battery, 6F22

Battery life

120 h

Display type


Display size

2 lines

Storage temperature

14° to 158 °F / -10 to +70 °C


11 oz. / 300 g