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.

52 Products found
  • testo 512 - 0-2000 hPa Pressure Meter 

    Order-Nr. 0560 5129

    The testo 512 0-2000hPa shows the pressure value in an easy-to-read, large, backlit display. Measurement data can be printed on site with date and time as well as minimum and maximum values. 

    • 8 Units Of Pressure 

    • kPa, hPa, Pa, mm H2O,mmHg, psi, inch H2O, inch Hg 

    • Built In Density Compensation 

    • Simlutaneous Display Of Flow & Pressure Values 

  • testo 512 - 0-20 hPa Pressure Meter 

    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

    • Simlutaneous Display Of Flow & Pressure Values 

    • 2 Measuing Units For Flow m/s, fpm 

  • testo 512 - 0-2hPa Pressure Meter 

    Order-Nr. 0560 5126

    The testo 512 differential pressure meter is available as four different models. This model has a measuring range from 0-2hPa 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

    • Built In Density Compensation 

    • Simlutaneous Display Of Flow & Pressure Values 

    • 2 Measuing Units For Flow m/s, fpm 

  • 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 - Precise Differential Pressure 

    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.

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    • 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 - Pressure Meter Industrial 

    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

    • Built in test menu's to check pressure drops 

    • 2 probe sockets to connect additional probes for measuring pressure, temperature, current/voltage 

  • testo 6383 - differential pressure transmitter for cleanrooms

    Order-Nr. 0555 6383

    With the testo 6383, you get a differential pressure transmitter in a cleanroom-compliant panel design. In addition to differential pressure, the transmitter also offers humidity and temperature recording (with an optional probe).

    • Flat housing enables flush surface integration in the cleanroom wall

    • Low measuring range from 10 Pa ensures very high precision at the lowest pressures

    • Pressure transmitter for measuring differential pressure, as an option: humidity and temperature

    • Automatic zero-point adjustment guarantees high temperature-independent accuracy and long-term stability

  • testo 6381 - differential pressure transmitter with flow calculation

    Order-Nr. 0555 6381

    The testo 6381 pressure transmitter for differential pressure offers the advantage of being able to calculate volume flow and flow velocity as well. With an optional probe, the transmitter also enables temperature and humidity measurements.

    • Automatic zero-point adjustment guarantees high temperature-independent accuracy and long-term stability

    • Low measuring range from 10 Pa ensures very high precision at the lowest pressures

    • Pressure transmitter for differential pressure, flow velocity and volume flow, as an option: humidity and temperature

    • Configurable alarm management with adjustable response delay and alarm acknowledgement

  • 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

  • Basic set testo 312-4

    Order-Nr. 0563 1327

    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 in heating systems
    system case

  • testo 550 - Refrigeration Gauge 

    Order-Nr. 0563 1550

    The Testo 550 refrigeration gauges instantly displays superheat and sub-cooling for up to 60 refrigerants. It also measures high / low side pressures and temperatures. With its free Bluetooth linked App, the Testo 550 opens up new possibilities for efficient analysis and documentation. 

    • 60 Built in refrigerants 

    • Additional 12 month (3 year) product
      warranty with registration 

    • On-site Reporting/ Monitoring Via Testo Refrigeration App 

    • Simplified menu structure 

  • High-pressure set testo 312-4

    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 set - Digital Refrigeration Gauge with Vacuum probe 

    Order-Nr. 0563 1557

    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.

    • 60 Built in refrigerants 

    • External vacuum probe for faster and more reliable evacuation of the system 

    • 4-way valve block with 1/4 in. and 3/8 in. ports 

    • Additional 12 month (3 years) product
      warranty with registration 

  • testo 6351 - differential pressure transmitter for industry

    Order-Nr. 0555 6351

    The testo 6351 pressure transmitter for differential pressure is suitable for industrial applications. It can record even the lowest pressures with a high level of accuracy. The pressure transmitter was specially designed for monitoring differential pressure in the 50 Pa to 2,000 hPa measuring range.

    • Automatic zero-point adjustment guarantees high temperature-independent accuracy and long-term stability

    • Low measuring range down to 50 Pa ensures very high precision at the lowest pressures

    • Measurement of differential pressure, flow velocity and volume flow

    • Configurable alarm management with adjustable response delay and alarm acknowledgement
       

  • testo 6321 - pressure transmitter for differential pressure

    Order-Nr. 0555 6321

    Measuring and control technology also ensures efficiency in air conditioning and ventilation technology: the testo 6321 high-precision pressure transmitter for measuring differential pressure has long-term stability and helps you to monitor and control processes in air conditioning, ventilation and cleanroom technology in a reliable and efficient way.

    • 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

    • Alignment and analysis save time and costs for commissioning and maintenance

    • Available with and without display

  • testo 510 - Differential pressure meter

    Order-Nr. 0560 0510

    The Testo 510 differential pressure meter allows you to carry out pressure difference measurements in air condtioning systems or air flow measurements in ventilation ducts using a pitot tube. The trusty and reliable meter has been tried and tested in the field and is ideal for installation and maintenance work in and around ventilation and air conditioning. 

    • Differential pressure from 0 to 100 hPa 

    • 10 Measurement unitsto choose from (hPa, mbar, mmHg, psi, m/s, fpm) 

    • Air flow measurements 

    • Temperature and air density compensation 

  • testo 549 - Digital manifold for beginners

    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

    • Additional 12 month (3 year) product warranty with registration 

    • Large 2-line backlit display 

    • Digital accuracy performs more reliably than analog manifold gauge sets for more precise readings 

52 Products found
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