Differential pressure gauges with built-in probe

The practical kit makes it even easier to work on air conditioning and refrigeration systems: the testo 550 digital manifold, including set of 3 filling tubes, enables you to get down to work straight away! The instrument can be used for 60 refrigerants, calculates superheating/subcooling automatically and can be connected to your smartphone/tablet via the testo refrigeration App. Thanks to the App, the display and documentation of the measurement results are particularly convenient.

• Extensive accessories included: set of 3 filling tubes, 2 x clamp temperature probes and transport case

• Automatic superheating/subcooling calculation for 60 refrigerants: no more need for error-prone manual calculations

• With a practical App: (remote) display, graphical progression display, documentation of readings and refrigerant updates

• Temperature-compensated leakage test

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 

Practical kit for work on air conditioning and refrigeration systems, as well as on heat pumps: the testo 557 digital manifold, including set of 4 filling tubes, enables you to get down to work straight away! The testo 557 digital manifold fulfils numerous functions in just one instrument: including superheating/subcooling calculation, vacuum measurement and temperature-compensated leakage test. You can also use a practical App to monitor the manifold via your smartphone/tablet and to store the measurement results or send them by e-mail.

• Extensive accessories included: set of 4 filling tubes, 2 x clamp temperature probes, precise external Pirani gauge for vacuum measurement and transport case
   

• Calculation of superheating and subcooling in real time for 60 refrigerants: no error-prone manual calculation

• Connection to smartphone/tablet App: remote monitoring, clever measurement documentation and refrigerant updates

• Temperature-compensated leakage test, automatic ambient pressure measurement

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 

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 

The testo 570-2 is a digital 4-way manifold gauge that combines the functions of all the old tools and measuring instruments it can so easily replace. The hvac manifold can measure, analyze and log – among other things – pressure, temperature, electricity and vacuum measurements.

• 40 refrigerant profiles stored in the instrument 

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

• Automatic heat pump mode – no need to replace refrigerant hoses 

• Real time data measurement and graphical editing with EasyKool software 

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 

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 

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

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 

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 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

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
   

Professional pressure/leak detector for installation, maintenance and service of gas and water pipes. Specially designed to carry out reliable leak tightness checks, load tests, serviceability tests, temperature measurements in accordance with existing rules and regulations.

• Easy to set up, easy to use due to legally compliant measuring menus (i.e. according to TRGI 2008)

• Extremely accurate and DVGW-compliant measuring results

• Leak tightness checks of gas pipes according to TRGI 2008 and liquid gas pipes according to TRF 2012

• Easy to use due to automatic pressure build-up; quick and easy data storage

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 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

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

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 

Precise, reliable measurement of all air velocity and IAQ parameters with just one measuring instrument: the multifunction measuring instrument features an integrated differential pressure sensor and intuitive operation with clearly structured measurement menus. Adjusting air conditioning and ventilation systems, monitoring air quality or carrying out comfort level measurements – thanks to versatile options for combining with high-quality, digital probes, you are ideally equipped to carry out your measuring task (please order probes separately).

• 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)

• Clear and reliable: large graphic display with parallel display of 3 readings as well as internal data storage and USB port for data export

• Includes a differential pressure sensor: for Pitot tube measurement and monitoring filters

Carry out measurements without any annoying cables: use the kit to handle all relevant measurements in ventilation ducts and at air/ceiling outlets. You will receive the testo 440 dP air velocity and IAQ measuring instrument including differential pressure sensor and the 100 mm vane probe head and hot wire probe head (Ø 9 mm) for attachment to the universal Bluetooth handle supplied.  To make measurements more convenient, both probe heads can be combined with the telescope included in the kit. The equipment can be transported safely and conveniently in the robust case.

• 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)​

• Convenient: wireless probes, internal data storage and USB port for data export

• Versatile: the testo 440 has an integrated differential pressure sensor and can be expanded with a large portfolio of digital probes