Pressure and air flow

Pressure plays an important role as a measurement parameter in air conditioning, ventilation and refrigeration technology. Our range of measuring instruments goes from absolute and differential pressure measuring instruments, through digital manifolds, to vacuum gauges and leak detectors. In addition to differential pressure measuring instruments, you can also use our anemometers or multifunction measuring instruments to measure air flow velocity – the latter are also suitable for analyzing indoor air quality.

193 products or recommendations for Pressure and air flow
  • testo 550 digital manifold kit - with Bluetooth® and set of 3 filling tubes

    Order-Nr. 0563 2550

    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

  • testo 550 - Digital manifold

    Order-Nr. 0563 1550

    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)

    349,00 €
    excl. VAT
  • testo 557 digital manifold kit - with Bluetooth® and set of 4 filling tubes

    Order-Nr. 0563 2557

    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

  • testo 557 set - Digital manifold

    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.
    • 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)

    479,00 €
    excl. VAT
  • testo 510 set - differential pressure measuring instrument

    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 

    129,00 €
    excl. VAT
  • testo Smart Probes AC & refrigeration test kit plus

    Order-Nr. 0563 0002 41

    For refrigeration engineers: The kit contains two testo 549i high-pressure gauges, two testo 605i thermohygrometers and two testo 115i clamp thermometers. Used in conjunction with your smartphone/tablet, the kit is ideal for servicing, troubleshooting and installing air conditioning and refrigeration systems. The testo Smart Probes App makes your work easier and more efficient: over 90 stored refrigerants, automatic calculation of superheating/subcooling, target superheat and cooling/heating power, emailing of measurement data reports as PDF or Excel files.
    • Application-specific measurement menus for superheating/subcooling, target superheat, heating/cooling power

    • More than 90 common refrigerants plus refrigerant updates in the testo Smart Probes App

    • 100 m Bluetooth® range for particularly flexible applications

    • Transmission and analysis of measurement data via testo Smart Probes App

  • testo Smart Probes AC & refrigeration test kit

    Order-Nr. 0563 0002 10

    For refrigeration engineers: Compact kit containing testo 549i high-pressure gauge and testo 115i clamp thermometer (two of each). Used in conjunction with your smartphone/tablet, the kit is ideal for servicing, troubleshooting and installing air conditioning and refrigeration systems. The testo Smart Probes App makes your work easier and more efficient: over 90 stored refrigerants, automatic calculation of superheating/subcooling, emailing of measurement data reports as PDF or Excel files.
    • Application-specific measurement menus for superheating/subcooling

    • More than 90 common refrigerants plus refrigerant updates in the testo Smart Probes App

    • 100 m Bluetooth® range for particularly flexible applications

    • Transmission and analysis of measurement data via testo Smart Probes App

  • testo 552 - Digital vacuum gauge with Bluetooth®

    Order-Nr. 0560 5522

    Extremely precise, rugged and practical: the testo 552 digital vacuum gauge. Ideal for evacuating refrigerant systems or heat pumps.
    • Measurement data monitoring via testo Smart Probes App

    • Measurement data dispatch via testo Smart Probes App

    • Extremely precise, extremely rugged, extremely practical – with visual alarm and backlit display

    • Measures pressure and calculates the evaporation temperature of H2O automatically

    150,00 €
    excl. VAT
  • testo 425 - Thermal anemometer with flow probe

    Order-Nr. 0560 4251

    The functional testing of ventilation and air conditioning systems includes monitoring the flow speed in ventilation ducts. If the air flow velocity and volumetric flow are not set correctly, the room air quality may suffer. The testo 425 thermal anemometer measures the flow speed and automatically calculates the volumetric flow.
    • Temperature and flow measurement as well as volumetric flow calculation

    • Permanently attached extendible telescopic probe – maximum length 820 mm, diameter 7.5 mm

    • With single and multi-point averaging

    • Hold function, display of min/max value, Auto-off function

    406,00 €
    excl. VAT
  • testo 549 - Entry-level 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) – you can do away with manual comparisons, which are prone to error, and obtain fast, accurate results

    • Temperature-compensated leakage test

    • Two temperature-compensated pressure sensors

    220,00 €
    excl. VAT
  • testo 405 i - thermal anemometer with smartphone operation

    Order-Nr. 0560 1405

    With the testo 405i hot wire anemometer, you can measure air velocities, temperatures and volume flows. Via Bluetooth, the readings are transmitted wirelessly straight to the testo Smart Probes App on your smartphone or tablet. You can view the values conveniently and use numerous intelligent features:
    • for measuring volume flow, air velocity and temperature

    • Simple configuration of the dimension and geometry of the duct cross-section for determining the volume flow

    • Convenient for working in ventilation ducts thanks to its telescopic tube, which can be extended up to 400 mm

    • Really convenient to operate thanks to the testo Smart Probes App (e.g. easy viewing of readings, measurement data trend, log function)

    90,00 €
    excl. VAT
  • testo Smart Probes HVAC/R Ultimate kit

    Order-Nr. 0563 0002 31

    Ultimate kit for all-round engineers in the field of heating, air conditioning, refrigeration and ventilation: The kit contains all the testo Smart Probes and is ideal for carrying out functional checks or for plant maintenance, in conjunction with your smartphone/tablet. The testo Smart Probes App enables you to work more easily and efficiently: Automatically calculate numerous parameters such as superheating/subcooling, target superheat, cooling/heating power, differential temperature or mould indication. Measurement data reports can be emailed directly as a PDF or Excel file.
    • For all measurements involving heating, air-conditioning, refrigeration and ventilation systems

    • All Smart Probes for temperature, pressure, humidity and flow in one kit

    • Display of measurement data progression as a graph or table

    • Transmission and analysis of measurement data via testo Smart Probes App

  • testo Smart Probes VAC kit

    Order-Nr. 0563 0003 10

    For air-conditioning engineers: Compact kit containing four measuring instruments for your most important measuring tasks in, on and involving air conditioning systems. The testo Smart Probes App enables you to work more easily and efficiently: Use intuitive measurement menus for volume flow measurement, for automatic calculation of the dew point and wet bulb temperature or for detecting areas susceptible to mould according to the traffic light principle. Measurement data reports can be emailed directly as a PDF or Excel file.
    • Measurement of air and surface temperature, humidity, air velocity and volume flow

    • Measurement menus for volume flow measurement in ducts and at outlets, identification of mould risk, easy image documentation including IR temperature reading and measurement spot marking

    • Display measurement data as a graph or table and analyze and send via testo Smart Probes App

    • In conjunction with your smartphone/tablet, carry out the most important measurements involved in air conditioning systems

  • testo 190-P1 - CFR Pressure data logger

    Order-Nr. 0572 1900

    Use the testo 190-P1 CFR pressure data logger for efficient monitoring of sterilization and freeze-drying processes. Designed for the pharmaceutical industry, the testo 190-P1 CFR data logger is ideally suited for tightness or overpressure testing in autoclaves and freeze-drying systems.
    • High-precision monitoring of absolute pressure in the 1 mbar to 4 barabs range

    • Durable, robust, reliably tight, even after changing the battery

    • Changing the battery takes just seconds, saving time and increasing efficiency

    • Simultaneous programming and readout of several CFR data loggers via the multifunction case

  • testo 191-P1 - HACCP pressure data logger

    Order-Nr. 0572 1916

    Use the testo 191-P1 HACCP pressure data logger, which is certified by HACCP International, for efficient monitoring of pasteurization and sterilization processes. Designed for food production, the testo 191-P1 is ideally suited for efficient saturated steam pressure testing in pasteurization and sterilization processes.
    • High-precision monitoring of absolute pressure in the 1 mbar to 4 barabs range

    • Durable, robust, reliably tight, even after changing the battery

    • Changing the battery takes just seconds, saving time and increasing efficiency

    • Simultaneous programming and readout of several HACCP data loggers via the multifunction case

  • testo 400 - Universal IAQ instrument

    Order-Nr. 0560 0400

    The testo 400 is the universal measuring instrument for all IAQ professionals. Measure, analyze and document all IAQ and comfort level parameters using just one instrument – simply, conveniently and in compliance with the standards. High-quality measuring technology, intuitive measurement assistants, versatile documentation options and a comprehensive selection of IAQ probes make the testo 400 the perfect partner for your day-to-day work.
    • 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

    • Measure all IAQ-related parameters – with our wide range of probes for all IAQ measurements

    • Document measuring values directly on the customer's site and send them by e-mail, or further analyze them using the testo DataControl PC software

  • testo 510 i - differential pressure measuring instrument with smartphone operation

    Order-Nr. 0560 1510

    Handy and intelligent: the compact testo 510i differential pressure measuring instrument featuring professional measuring technology and smartphone operation for measuring differential pressure, air flow velocity and volume flow. Readings can be viewed conveniently on your smartphone/tablet via the testo Smart Probes App and emailed directly.
    • Measurement of gas flow and static pressure

    • Measurement menu for pressure drop test including alerts

    • Simple configuration and determination of volume flow with Pitot tube

    • Magnetic holder for easy attachment

    85,00 €
    excl. VAT
  • testo 440 Hot Wire Kit

    Order-Nr. 0563 4400

    Kit for carrying out measurements in ventilation ducts: the testo 440 air velocity and IAQ measuring instrument and the hot wire probe (Ø 9 mm) including temperature sensor are all safely stowed away in the case. So you can get down to work straight away!
    • Intuitive: clearly structured measurement menu for volume flow and parallel determination of air velocity, volume flow and air temperature in ventilation ducts

    • Convenient: integrated telescope that can be extended to 0.85 m, with scaling, makes it easy to carry out measurements

    • Reliable: absolute pressure compensation, internal data storage and USB port for data export

    • As multifaceted as your challenges themselves: the air velocity and IAQ measuring instrument can be expanded with a large portfolio of digital probes

  • testo 440 16 mm Vane Kit

    Order-Nr. 0563 4401

    Kit for carrying out measurements in ventilation ducts: the testo 440 air velocity and IAQ measuring instrument and the vane probe (Ø 16 mm) are safely stowed away in the case. So you can get down to work straight away!
    • Intuitive: clearly structured measurement menu for volume flow and determination of air velocity in ventilation ducts

    • Convenient: integrated telescope that can be extended to 0.85 m, with scaling, makes it easy to carry out measurements

    • Reliable: internal data storage and USB port for data export

    • As multifaceted as your challenges themselves: the air velocity and IAQ measuring instrument can be expanded with a large portfolio of digital probes

  • testo 405 - Thermal anemometer

    Order-Nr. 0560 4053

    Use the testo 405 thermal anemometer to measure air velocity, volumetric flow and air temperature. It is suitable for carrying out quick check measurements in ventilation ducts and for measuring the air velocity in rooms, e.g. at draughty windows.
    • Measurement of air velocity, volumetric flow and air temperature

    • For measurements in ventilation ducts and in rooms

    • Particularly precise in the range between 0 and 2 m/s

    • Telescope extendible to 300 mm

    113,00 €
    excl. VAT
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