1. Home
    2. testo 521-3

    testo 521-3 - Differential pressure measuring instrument 0 to 2.5 hPa

    0560 5213
  1. Integrated temperature-compensated differential pressure sensor with accuracy of up to ± 0.5 Pa
  2. Calculation of the flow velocity and the volume flow via Pitot tube (optional)
  3. Direct zeroing of the display values of pressure probes
  4. 2 probe inputs for additional pressure and temperature probes
     
    5. Product no longer available. Are you familiar with the alternative?
    Why not enjoy the benefits that it has to offer: >> To the product
    Using the testo 521-3, even the smallest differential pressures, up to 250 Pa, are measured. High accuracy and a resolution of 0.1 Pa mean the instrument is ideal for differential pressure measurements in clean rooms.
    When used with a pitot tube, the internal pressure sensor measures flow speeds in the range of 0.01 to 3937 fpm.

    testo 521-3 differential pressure measuring instrument, including calibration protocol and batteries

    Customers who viewed this product also viewed

  5. Customers who viewed this product also viewed
    testo 440 Delta P Air Flow ComboKit 1 with Bluetooth®
    testo 440 dP - Air flow ComboKit 1 with Bluetooth and delta P
    • A measuring instrument for all climate-related parameters
    • Intuitive: clearly structured measurement menu for volume flow and parallel determination of air velocity, differential pressure, humidity and temperature in ventilation ducts or at ventilation outlets
    :
    0563 4409
    1
  6. Customers who viewed this product also viewed
    testo 440 Delta P Air Flow ComboKit 2 with Bluetooth®
    testo 440 dP - Air flow ComboKit 2 with Bluetooth and delta P
    • A measuring instrument for all climate-related parameters
    • Intuitive: clearly structured measurement menu for volume flow and parallel determination of air velocity, differential pressure, humidity and temperature in ventilation ducts, at ventilation outlets and in work rooms
    :
    0563 4410
    1
  7. Customers who viewed this product also viewed
    testo 510 Set
    testo 510 - Digital manometer
    • Pocket-sized temperature-compensated differential pressure measurement
    • Illuminated display
    :
    0563 0510
    1
  8. Customers who viewed this product also viewed
    testo 420
    testo 420 - Differential pressure manometer
    • Differential pressure measurement, useful for checking filters in air conditioning and ventilation systems
    • Calculate flow velocity and volume flow using an optional pitot tube
    :
    0560 0420
    1
  9. Customers who viewed this product also viewed
    testo 440 dP Air velocity and IAQ measuring instrument including differential pressure sensor
    testo 440 dP - Air velocity and IAQ measuring instrument with differential pressure sensor
    • A measuring instrument for all climate-related parameters
    • Includes a differential pressure sensor: for Pitot tube measurement and monitoring filters
    :
    0560 4402
    1
  10. Customers who viewed this product also viewed
    testo 400 Universal IAQ instrument
    testo 400 - Universal Air Flow and IAQ Instrument
    • A measuring instrument for all climate-related parameters
    • Smart, intuitive measurement programs including HVAC grid measurement as per EN ISO 12599 and ASHRAE 111, PMV/PPD and turbulence as per EN ISO 7730 and ASHRAE 55
    :
    0560 0400
    1
  11. Customers who viewed this product also viewed
    testo 512-1
    testo 512-1 - Digital differential pressure measuring instrument with App connection
    • Simple, fast and precise differential pressure measurement (0 to 200 hPa) for checking filters and for Pitot tube measurement in the ventilation duct
    • Reliable measurement results due to position-independent differential pressure sensor with high accuracy
    :
    0563 1512
    1

    12. 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 1.0 InH₂O** / 0 to 2.5 hPa**
    Accuracy
    ±(0.0 InH₂O ±0.5 % of mv) (0.1 to 1 InH₂O) / ±(0.5 Pa ±0.5 % of mv) (20.1 to 250 Pa)
    ±0.0 InH₂O (0 to 0 InH₂O) / ±0.5 Pa (0 to 20 Pa)
    Resolution
    0.1 InH₂O / 0.1 Pa
    Static pressure
    400 InH₂O / 1000 hPa
    Overload
    20 InH₂O / 50 hPa
    Zeroing
    to 0.2 InH₂O / to 0.5 hPa
    **Sensor is not suitable for long-term measurements

    Differential pressure probes

  12. Differential pressure probes
    Precision pressure probe, 100 Pa, measures differential pressure and velocity (with Pitot tube)
      :
      0638 1347
    • Differential pressure probes
      Drucksonde-0638-1347-neutral
      Meas.Range 0 to + 14.5 psi
        :
        0638 1647

        • Pitot tubes

      • Pitot tubes
        Staurohr
        Pitot tube, stainless steel, 19.7 in.
          :
          0635 2045
          $ 199.75
          1
        • Pitot tubes
          Staurohr
          Pitot tube, stainless steel, 13.8 in.
            :
            0635 2145
            $ 174.25
            1

            • Pressure Probe Accessories

          • Pressure Probe Accessories
            0638 1847_absolute-pressure-probe
            Pressure probe, 29 psi, measures absolute pressure
              :
              0638 1847

              • Relative pressure probe

            • Relative pressure probe
              low-pressure-high-pressure-probe
              Low pressure probe, refrigerant-proof stainless steel, without cable
                :
                0638 1741
              • Relative pressure probe
                low-pressure-high-pressure-probe
                High pressure probe, refrigerant-proof stainless steel, up to 435 psi, without cable
                  :
                  0638 1841

                  • Temperature probes

                • Temperature probes
                  Super quick-action immersion/penetration probe for measurements in liquids
                    :
                    0604 0493