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testo 521-1 - Differential pressure measuring instrument 0 to 100 hPa (accuracy ±0.2% of f.v.)

0560 5210
  • 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
  • The high precision testo 521-1 differential pressure measuring instrument is ideal for accurate differential pressure measurements in air conditioning and ventilation technology, for pressure drop on filters, for instance, for checking fans and extractors, or for pitot tube measurements.

    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 of 5 to 100 m/s. The testo 521 is available in 2 accuracy classes, the testo 521-1 with an internal pressure sensor with Class 0.2, and the testo 521-2 with an internal pressure sensor with Class 0.1.


    In the case of velocity speeds in the range of 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.

    testo 521-1 differential pressure measuring instrument, including calibration protocol and batteries

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  • Temperature - NTC

    Measuring range
    -40° to 302 °F / -40 to +150 °C
    Accuracy
    ±0.7 °F (Remaining Range)* / ±0.4 °C (Remaining Range)*
    ±0.4 °F (14° to 122 °F)* / ±0.2 °C (-10 to +50 °C)*
    Resolution
    0.1 °F / 0.1 °C
    *Accuracy information applies only to instrument without probes connected

    Temperature - Type K TC

    Measuring range
    -328° to 2498 °F / -200 to +1370 °C
    Accuracy
    ±0.7 °F (-148° to 392 °F)* / ±0.4 °C (-100 to +200 °C)*
    ±2 °F Remaining Range* / ±1 °C Remaining Range*
    Resolution
    0.1 °F / 0.1 °C
    *Accuracy information applies only to instrument without probes connected

    Differential pressure (internal sensor) - Piezoresistive

    Measuring range
    0 to 40 InH₂O / 0 to 100 hPa
    Accuracy
    ±0.2 % of full-scale value
    Resolution
    0.01 InH₂O / 0.01 hPa
    Static pressure
    400 InH₂O (abs) / 1000 hPa (abs)
    Overload
    120 InH₂O / 300 hPa
    Zeroing
    to 1.0 InH₂O / to 2.5 hPa

    Accessories for probes

    Additional accessories and Spare parts

  • Additional accessories and Spare parts
    Connection cable
    Connection cable.
      :
      0430 0143
    • Additional accessories and Spare parts
      9V rech. battery for instrument
      9V rechargeable battery for instrument
        :
        0515 0025
      • Additional accessories and Spare parts
        Connection hose, silicone
        Connection hose, silicone, 16.4 ft, load up to 281 inH₂O
          :
          0554 0440
        • Additional accessories and Spare parts
          Desk-top power supply
          Power supply for compact gas drier and flue gas analyzer
            :
            0554 1143
          • Additional accessories and Spare parts
            Adapter to connect NiCr-Ni thermocouples and probes with open wire ends
              :
              0600 1693
            • Printer and accessories

              Transport Case

            • Transport Case
              TopSafe
              TopSafe (protective case)
                :
                0516 0446