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. For instance, 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.

44 Products found
  • testo 510 - Differential Pressure Meter

    Order-Nr. 0563 0510

    Differential pressure measurement on gas hot water heaters or on filters of air conditioning systems, and also flow measurements in ventilation ducts using a Pitot tube: the compact testo 510 differential pressure measuring instrument, which comes with a silicone connection hose and other useful accessories, can help you maintain and install systems in the sanitary and HVAC sector.

    • Differential pressure measurement from 0 to 100 hPa 

    • Flow measurement possible with a Pitot tube (available as an option)  

    • Magnets on the rear allow hands-free work 

    • 10 units to choose from, display in pascals can be selected 

  • testo Heating Set (testo 115i, testo 510i and testo 805i in the testo Smart Case) - with smartphone operation

    Order-Nr. 0563 0004

    With the Testo Smart Probes Heating set, you can measure and check all heating system temperatures and pressures in conjunction with your smartphone. The robust testo Smart Case enables the measuring instruments to be conveniently transported and ensures that they are always to hand when needed.

    • Measurement of gas flow and static pressure

    • Non-contact temperature measurement on underfloor heating systems and radiators

    • Measurement menu for pressure drop test, including alerts via testo Smart Probes App

    • Rapid image documentation with IR temperature readings and measuring spot marking

  • testo 512 - Differential pressure meter for 0 to 2000 hPa

    Order-Nr. 0560 5129

    The testo 512 differential pressure measuring instrument is available in four different versions. This version is ideal for differential pressure measurement in the measuring range 0 to 2000 hPa.

    • 7 pressure units to choose from: kPa, hPa, mm H2O, mmHg, psi, inch H2O, inch Hg

    • Large measuring range up to 2000 hPa

    • TopSafe protective case (optional) protects against impact, dirt and spray water

    • Illuminated display, min./max. value display, hold function

  • testo 512 - Differential pressure meter for 0…20 hPa

    Order-Nr. 0560 5127

    The testo 512 differential pressure meter is available as four different models. This model has a measuring range from 0….20 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 5 and 55 m/s.

    • 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

    • Integrated density compensation

    • Backlit display, min/max values, hold function

  • testo 512 - Differential pressure meter for 0…200 hPa

    Order-Nr. 0560 5128

    The testo 512 differential pressure meter is available as four different models. This model has a measuring range from 0…200 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 10 and 100 m/s.

    • 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

    • Integrated density compensation

    • Backlit display, min/max values, hold function

  • testo 512 - Differential pressure meter for 0…2 hPa

    Order-Nr. 0560 5126

    The testo 512 differential pressure meter is available as four different models. This model has a measuring range from 0…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.

    • 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

    • Integrated density compensation

    • Backlit display, min/max values, hold function

  • testo 420 - Differential pressure measuring instrument

    Order-Nr. 0560 0420

    Use the testo 420 differential pressure measuring instrument to carry out simple, efficient tests on filters. You can also use the measuring instrument in conjunction with a Pitot tube to measure flow velocity and volume flow really easily in ventilation ducts.

    • Differential pressure measurement, e.g. to check filters in air conditioning and ventilation systems

    • Calculate flow velocity and volume flow using a Pitot tube

    • Handy instrument featuring a large display and user-friendly menu guidance

    • Save measurement data for analysis and documentation

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

    Order-Nr. 0560 5210

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

    • 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

  • testo 526-2 - High-precision differential pressure measuring instrument

    Order-Nr. 0560 5281

    The testo 526-2 high-precision differential pressure measuring instrument is ideally suited for checking pressure in sensitive industrial processes, thanks to a measuring accuracy of ± 0.05% of final value. Two additional pressure and temperature probes can also be attached.

    • Temperature-compensated differential pressure sensor

    • Multi-point and timed mean calculation

    • Freely selectable measuring rate for recording measurement data

    • 2 additional probe inputs for the attachment of optional pressure and temperature probes

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

    Order-Nr. 0560 5213

    The testo 521-3 high-precision differential pressure measuring instrument easily determines even the smallest differential pressures (up to +2.5 hPa). Its high accuracy and a resolution of 0.1 Pa make the instrument ideal for differential pressure measurements in clean rooms or for flue inspections.
     

    • 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)

    • Direct zeroing of the display values of pressure probes

    • 2 probe inputs for additional pressure and temperature probes
       

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

    Order-Nr. 0560 5211

    The high-precision testo 521-2 differential pressure measuring instrument is ideal for accurate differential pressure measurements in air conditioning and ventilation technology, for instance for pressure drop on filters, checking fans and extractors or for Pitot tube measurements.

    • 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)

    • Multi-point and timed mean calculation

    • 2 probe inputs for additional pressure and temperature probes
       

  • testo 526-1 - High-precision differential pressure measuring instrument

    Order-Nr. 0560 5280

    Ideal for checking pressure in sensitive industrial processes: the testo 526-1 high-precision differential pressure measuring instrument with a measuring accuracy of ± 0.1% of final value. It also has two probe inputs for additional pressure and temperature probes.

    • Temperature-compensated differential pressure sensor

    • Multi-point and timed mean calculation

    • Recording of measurement data with freely selectable measuring rate

    • 2 probe inputs for pressure and temperature

  • testo 549 - Digital Manifold

    Order-Nr. 0560 0550

    The testo 549 digital manifold offers many advantages in comparison with analog manifolds: the instrument will make it easier for you to work on refrigeration systems and heat pumps. With its integrated temperature measurement and automatic calculation of superheating/subcooling, you can now do away with additional measurements and manual comparisons (when using an optional clamp probe). You can also use the manifold for 60 current refrigerants.

    • 60 current refrigerants stored in the instrument

    • Calculation of superheating and subcooling in real time (with optional clamp probe): saves you from having to carry

    • Temperature-compensated leakage test

    • Two temperature-compensated pressure sensors

  • testo 445 - climate measuring instrument

    Order-Nr. 0560 4450

    You can keep a close eye on indoor air quality with the testo 445 climate measuring instrument: the allrounder can measure up to 6 parameters (with the appropriate probe), which can help you make a professional assessment of indoor air quality. The climate measuring instrument therefore supports you in adjusting and checking ventilation and air conditioning systems.

    • Multi-function climate measuring instrument: measure up to 6 measurement parameters at the same time

    • Internal reading memory for up to 3,000 readings

    • Automatic allocation of the duct cross-section to the measuring location (max. 99 measuring locations)

    • Automatic mean value calculation and determination of the volume flow

  • testo 550 - Digital manifold

    Order-Nr. 0563 1551

    The testo 550 digital manifold can now make working on refrigeration systems and heat pumps even easier: the instrument can be used for 60 refrigerants, calculates superheating/subcooling automatically and can now also be connected to a practical smartphone/tablet app. The app makes the operation and the documentation of measurement results significantly more convenient.

    • Automatic superheating/subcooling calculation: no more need for manual calculations, which are prone to error

    • With a practical app: (remote) display, graphical progress display, documentation of readings

    • Temperature-compensated leakage test

    • 60 current refrigerants are included in the manifold (update possible via app)

  • testo 312-4 - Differential Pressure Meter (High-pressure Set)

    Order-Nr. 0563 1328

    testo 312-4 differential pressure gauge
    testo 312-4 hose set
    balloon pump with release screw
    conical test plug 1/2
    conical test plug 3/4
    testo fast printer
    pressure set for gas pressure measurements on heating systems
    high-pressure plug 3/8 und 3/4
    high-pressue plug 1/2 and 1
    high-pressure probe 1up to 25 bar
    system case

  • testo 557 - Digital Manifold Set (Bluetooth) (without sight glass)

    Order-Nr. 0563 1558

    The testo 557 digital manifold fulfils numerous functions, which are required for working on refrigeration systems and heat pumps, in just one instrument: for example superheating/subcooling calculation, vacuum measurement, temperature-compensated leakage test. You can also use a practical app to monitor the manifold via your smartphone/tablet and store the measurement results or send them by e-mail.

    • Calculation of superheating and subcooling in real time: no manual calculation, which is prone to error

    • Connect to smartphone/tablet app: remote monitoring and smart measurement documentation

    • Precise external Pirani gauge for vacuum measurement, temperature-compensated leakage test, automatic ambient pressure measurement

    • The 60 most common refrigerants are stored in the instrument, subsequent updates possible (via app)

  • testo 420 - Volume flow hood

    Order-Nr. 0563 4200

    Make sure you get the testo 420 volume flow hood for larger ceiling outlets and at the same time enjoy multiple maintenance benefits on HVAC systems. Because the flow hood with the removable measuring instrument is not only exceptionally light, it also guarantees accurate volume flow calculations at swirl outlets

    • Volume flow hood for larger swirl outlets for measuring volume flow, temperature and relative humidity

    • Impressively light with a weight of 2.9 kg

    • Precise measurement even at swirl outlets thanks to integrated volume flow straightener

    • Fast set-up, convenient operation and protocol creation on site using the App

  • testo 435-4 - Multifunction indoor air quality meter

    Order-Nr. 0563 4354

    The testo 435-4 multifunction indoor air quality meter allows you to carry out all the measurements you need to inspect and adjust ventilation and air conditioning systems and to check the quality of the indoor air. There is also an integrated pressure difference sensor for pitot static tube measurements and filter monitoring and a wide range of optionally available sensors and probes to choose from.

    • Includes pressure difference sensor for pitot static tube measurements or filter monitoring

    • Further sensors optionally available (eg. anemometer, moisture sensors, lux and degree of turbulence sensors) for a variety of different measuring applications

    • Super-size memory for up to 10 000 measurements

    • PC software for analyzing and logging measuring data

44 Products found
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