Differential pressure

As the name implies, differential pressure measures the difference between two pressures. Instruments calculate differential pressure by measuring the disparity between two separate physical spaces. 

For example, when pressure drops on one side of a vent relative to another, the device will recognise this discrepancy.Specifically, differential pressure measurement instruments enable HVAC technicians to deduce the pressure inequality at intake and outflow vents. 
With this insight, professionals can determine whether there's something wrong with the system. Testo's digital pressure instruments possess excellent dynamic performance and low material stress. These features give the device physical stability. Furthermore, our devices have an accuracy of 0.05 per cent. The instrument you choose depends on the demands of your job. 
 
Did you know: The testo 511 absolute pressure meter is ideal for calculating absolute pressure at ducts with assistance from pitot tubes. It serves as an ideal device when measuring density compensation in flow measurement in ducts, laboratories and production processes.

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59 products or recommendations for Differential pressure
  • testo 510 Set

    testo 510 set - differential pressure measuring instrument

    Order-Nr. 0563 0510

    $264.00
    incl. GST  $290.40
    • Differential pressure measurement from 0 to 100 hPa 
    • Flow measurement possible with a Pitot tube (available as an option)  
    Details
  • Testo 512

    testo 512 - 0-2000 hPa Pressure Meter 

    Order-Nr. 0560 5129

    $779.00
    incl. GST  $856.90
    • 8 Units Of Pressure 
    • kPa, hPa, Pa, mm H2O,mmHg, psi, inch H2O, inch Hg 
    Details
  • Testo 512

    testo 512 - 0-20 hPa Pressure Meter 

    Order-Nr. 0560 5127

    $779.00
    incl. GST  $856.90
    • 8 measurement units to choose from: psi, kPa, hPa, Pa, mm H2O, mmHg, inch H2O, inch Hg
    • 2 air flow units to select from: m/s, fpm
    Details
  • Testo 512

    testo 512 - Differential pressure meter for 0…200 hPa

    Order-Nr. 0560 5128

    $779.00
    incl. GST  $856.90
    • 8 measurement units to choose from: psi, kPa, hPa, Pa, mm H2O, mmHg, inch H2O, inch Hg 
    • 2 air flow units to select from: m/s, fpm
    Details
  • testo 420

    testo 420 - Differential pressure measuring instrument

    Order-Nr. 0560 0420

    $1 621.00
    incl. GST  $1 783.10
    • Differential pressure measurement, e.g. to check filters in air conditioning and ventilation systems
    • Calculate flow velocity and volume flow using a Pitot tube
    Details
  • testo 521-1

    testo 521-1 - differential pressure measuring instrument (0.2 % of f.v.)

    Order-Nr. 0560 5210

    $1 656.00
    incl. GST  $1 821.60
    • 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)
    Details
  • testo 526-1

    testo 526-2 - Precise Differential Pressure 

    Order-Nr. 0560 5281

    $2 067.00
    incl. GST  $2 273.70
    •  
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    Details
  • testo 521-1

    testo 521-3 - Differential pressure measuring instrument (up to 2.5 hPa)

    Order-Nr. 0560 5213

    $1 701.00
    incl. GST  $1 871.10
    • Integrated temperature-compensated differential pressure sensor with accuracy of up to ± 0.5 Pa
    • Calculation of the flow velocity and the volume flow via Pitot tube (optional)
    Details
  • Testo 512

    testo 512 - 0-2hPa Pressure Meter 

    Order-Nr. 0560 5126

    $779.00
    incl. GST  $856.90
    • 8 measurement units to choose from: psi, kPa, hPa, Pa, mm H2O, mmHg, inch H2O, inch Hg
    • Built In Density Compensation 
    Details
  • testo 521-1

    testo 521-2 - differential pressure measuring instrument (0.1 % of f.v.)

    Order-Nr. 0560 5211

    $2 067.00
    incl. GST  $2 273.70
    • Integrated differential pressure sensor with an accuracy of 0.1 % of f.v.
    • Calculation of the flow velocity and the volume flow via Pitot tube (optional)
    Details
  • testo 526-1

    testo 526-1 - Pressure Meter Industrial 

    Order-Nr. 0560 5280

    $1 541.00
    incl. GST  $1 695.10
    • Temperature-compensated differential pressure sensor
    • Multi-point and timed mean calculation
    Details
  • testo 550i

    testo 550i - App-controlled digital manifold with Bluetooth and 2-way valve block

    Order-Nr. 0564 2550

    • All activities, from measurement through to documentation, using the testo Smart App on your Smartphone
    • The smallest digital manifold on the market
  • testo 549

    testo 549 - Digital manifold for beginners

    Order-Nr. 0560 0550

    Price on Request
    • 60 current refrigerants stored in the instrument
    • Additional 12 month (3 year) product warranty with registration 
  • testo Smart Probes HVAC/R Ultimate kit

    testo Smart Probes HVAC/R Ultimate kit

    Order-Nr. 0563 0002 32

    • For all measurements involving heating, air-conditioning, refrigeration and ventilation systems
    • All Smart Probes for temperature, pressure, humidity and flow in one kit
  • testo 400 Universal IAQ instrument

    testo 400 - Universal IAQ instrument

    Order-Nr. 0560 0400

    Price on Request
    • 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
    • High-precision, location-independent and integrated differential pressure sensor
  • testo 510i

    testo 510 i - differential pressure measuring instrument with smartphone operation

    Order-Nr. 0560 1510

    Price on Request
    • Measurement of gas flow and static pressure
    • Measurement menu for pressure drop test including alerts
  • testo 440 Delta P Air Flow ComboKit 1 with Bluetooth®

    testo 440 delta P Air Flow ComboKit 1 with Bluetooth®

    Order-Nr. 0563 4409

    $3 094.00
    incl. GST  $3 403.40
    • 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​
    • Smart: simply combine the universal Bluetooth handle with the 100 mm vane or hot wire probe head and the extendable telescope (1.0 m)​
    Details
  • testo 440 Delta P Air Flow ComboKit 2 with Bluetooth®

    testo 440 delta P Air Flow ComboKit 2 with Bluetooth®

    Order-Nr. 0563 4410

    $3 328.00
    incl. GST  $3 660.80
    • 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
    • Smart: combine the universal Bluetooth handle with the humidity/temperature probe head or extendable telescope (1.0 m). Vane probe heads (Ø 16 mm, Ø 100 mm) can simply be plugged into the telescope
    Details
  • testo 440 Air velocity and IAQ measuring instrument

    testo 440 - Air velocity and IAQ measuring instrument

    Order-Nr. 0560 4401

    $635.00
    incl. GST  $698.50
    • Intuitive: clearly structured measurement menus for volume flow, degree of turbulence, cooling/heating output, mould detection and long-term measurement, such as CO₂
    • Wireless: Bluetooth® probes for extra convenience when measuring and less cable clutter in the measuring case (please order probes separately)
    Details
  • testo 440 dP Air velocity and IAQ measuring instrument including differential pressure sensor

    testo 440 dP - Air velocity and IAQ measuring instrument including differential pressure sensor
     

    Order-Nr. 0560 4402

    $857.00
    incl. GST  $942.70
    • Intuitive: clearly structured measurement menus for volume flow, K-factor, degree of turbulence, cooling/heating output, mould detection and long-term measurement, such as CO₂
    • Wireless: Bluetooth® probes for extra convenience when measuring and less cable clutter in the measuring case (please order probes separately)
    Details
  • testo 570 digital manifold

    testo 570-2 kit - digital refrigeration gauge with data logging 

    Order-Nr. 0563 5702

    Price on Request
    • 40 refrigerant profiles stored in the instrument 
    • Additional 12 month (3 years) product warranty with registration 
  • Smart Probes Heating Set

    testo Smart Probes heating kit

    Order-Nr. 0563 0004 10

    • Non-contact temperature measurement, measurement of flow and return temperature as well as gas flow pressure
    • Measurement menu for pressure-drop test including alarm function
  • testo 6321

    testo 6321 - pressure transmitter for differential pressure

    Order-Nr. 0555 6321

    • Pressure transmitter for measuring differential pressure in the 100 Pa to 2 bar measuring range
    • Magnetic valve for automatic zero-point adjustment guarantees high temperature independent accuracy and long-term stability
  • testo 420

    testo 420 - Air Flow Hood 

    Order-Nr. 0563 4200

    $4 431.00
    incl. GST  $4 874.10
    • 16 measurement points that records Temperature, Humidity, Differential & Absolute Pressure. 
    • Highly precise readings at swirl outlets thanks to flow straightener. 
    Details
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