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. You can even use our anemometers or multifunction measuring instruments to measure air flow velocity. Our multifunction measuring instruments are suitable for analyzing indoor air quality, as well.

167 products or recommendations for Pressure and air flow
  • testo 549 - Digital manifold

    Order-Nr. 0560 0550

    The testo 549 digital manifold is a breakthrough value, making analog gauges obsolete. It precisely measures high side / low side pressure and instantly displays the corresponding saturation / evaporation temperatures for 60 refrigerants. With optional temperature probes, automatic superheat and sub-cooling calculations can also be displayed.
    • 60 refrigerant profiles stored in the instrument

    • Rugged housing with additional one year warranty (with registration)

    • Large 2-line backlit display

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

  • testo 557 - 4-Valve digital manifold kit with Bluetooth and external vacuum gauge

    Order-Nr. 0563 1557

    The testo 557 4-valve digital manifold with 3/8 in. and 1/4 in. vacuum ports comes with a remote vacuum probe for faster and more reliable evacuations, Bluetooth, app connectivity, two clamp temperature probes for instantaneous superheat / subcooling readings, and a convenient service case.
    • External vacuum probe for faster and more reliable system evacuation

    • Bluetooth / app integration for monitoring, report generation, and sending reports and invoices via email

    • Accurate, simultaneous superheat / subcooling measurements

    • Rugged housing with additional one year warranty (with registration) for reliable testing

  • testo 550 - Digital Manifold Kit with Bluetooth

    Order-Nr. 0563 1550

    The testo 550 instantly displays superheat and subcooling 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.
    • Includes two temperature clamp probes (two channel NTC temperature inputs) and service case

    • Bluetooth / app integration for monitoring, generating reports, and sending reports and invoices via email

    • Large 2-line backlit display

    • Rugged housing with additional one year warranty (with registration) for reliable service

  • testo 570 - 4-Valve digital manifold kit with data logging

    Order-Nr. 0563 5703

    The testo 570 4-valve digital manifold has an internal vacuum sensor, data logging and printing capabilities, and an additional third probe port for either ambient temperature, current, or oil pressure probes.
    • Internal vacuum sensor

    • Data logging and printing capabilities

    • 999 hours of data for further evaluation on your PC

    • Includes 2 temperature clamp probes, USB cable, and carry case

  • testo 552 - Digital vacuum / micron gauge with Bluetooth

    Order-Nr. 0560 5522

    The testo 552 digital micron gauge is ideal for monitoring the evacuation of air conditioning, refrigeration, and heat pump systems. It is rich in features that make your work faster, easier, and more accurate.
    • Precise and reliable vacuum measurements, 1 micron resolution

    • Displays the saturation temperature of H2O to ensure full and proper evacuation

    • Illuminated, backlit display with visual alarm for evacuation pressure

    • Wireless Bluetooth communication to smartphone or tablet provides powerful analysis and reporting to display data, create reports, and send via email or SMS

  • testo Smart Probes AC & refrigeration test kit

    Order-Nr. 0563 0002 20

    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 documents.
    • Application-specific measurement menus for superheating/subcooling

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

    • 350 ft Bluetooth® range for particularly flexible applications

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

  • testo 550 digital manifold kit - with Bluetooth® and set of 3 hoses

    Order-Nr. 0563 2550

    The complete kit for work on air conditioning and refrigeration systems, as well as on heat pumps: the testo 550 digital manifold, including a set of 3 hoses. This kit enables you to get down to work right away! The instrument can be used for 60 refrigerants, automatically calculating superheating/subcooling and can be connected to your smartphone/tablet via the testo refrigeration App. You can also use the powerful testo Refrigeration App to monitor the manifold via your smartphone/tablet and to store the measurement results or send them by e-mail as a complete report.
    • Complete Kit: set of 3 hoses, 2 x pipe clamp temperature probes and transport case

    • Automatic calculation of superheating/subcooling for 60 refrigerants: no hassle of manual calculations

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

    • Temperature-compensated leakage test

  • testo 557 digital manifold kit - with Bluetooth® and set of 4 hoses

    Order-Nr. 0563 2557

    The complete kit for work on air conditioning and refrigeration systems, as well as on heat pumps: the testo 557 digital manifold, including a set of 4 hoses! This kit 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 the powerful testo Refrigeration App to monitor the manifold via your smartphone/tablet and to store the measurement results or send them by e-mail as a complete report.
    • Complete kit: set of 4 hoses, 2 x pipe clamp temperature probes, precise external Pirani gauge for vacuum measurement and transport case

    • Automatic calculation of superheating and subcooling in real time for 60+ refrigerants: no hassle of manual calculations

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

    • Temperature-compensated leakage test and automatic ambient pressure measurement

  • testo 510 - Digital manometer

    Order-Nr. 0563 0510

    With the testo 510, performing system tests has never been easier using our single, easy to use, rugged, compact digital manometer. Its small form factor, bright backlit display, and magnetic backing will enable the 510 to be used in a wide variety of applications.
    • Temperature and air density compensation for accurate airflow measurements

    • Measures differential pressure to 40 in. H2O

    • Backlit display ensures easy readability in low light situations

    • Temperature compensated pressure sensor

  • testo Smart Probes AC & Refrigeration Test & Load kit

    Order-Nr. 0563 0009

    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 load, 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

    • 350 ft Bluetooth® range for particularly flexible applications

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

  • testo 425 - Hot wire anemometer

    Order-Nr. 0560 4251

    The testo 425 hot wire anemometer can measure cubic feet per minute (CFM) when conducting duct testing, as well as easily switch between flow and temperature readings. The telescoping handle of the thermal probe on this CFM meter makes it easy to reach ductwork above your head.
    • Telescoping hot wire probe

    • Measures velocity, volume flow (CFM), and temperature

    • Timed and multi-point average flow calculations

    • Auto-off function saves battery life

  • testo 405i - Hot-wire anemometer wireless Smart Probe

    Order-Nr. 0560 1405

    The testo 405i Smart Probe is a wireless instrument for measuring air flow velocity, temperature, and volume flow.  It is equipped with a telescopic shaft, which extends to 15” for easy in-duct testing.  You can reliably determine timed and multipoint flow traverses.
    • Measures air velocity, volume flow, and temperature

    • Measures in-duct air flow, and automatically calculates volume flow (simply enter the duct dimensions)

    • Small diameter (<0.5”) and 15” telescopic shaft length is ideal for in-duct flow averaging and timed traverse

    • Perform air duct leakage tests

  • testo Smart Probes HVAC/R Complete kit

    Order-Nr. 0563 0007

    Complete 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 load, differential temperature or mold indication. Measurement data reports can be emailed directly as a PDF or Excel file.

    **NOTE** The testo 115i, 549i, and 605i Smart Probes now have an extended Bluetooth range of up to 350 Feet!**
    • 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 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 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 400 - Universal Air Flow and IAQ Instrument

    Order-Nr. 0560 0400

    The testo 400 is the universal measuring instrument for all TAB / Commissioning and IAQ professionals. Measure, analyze and document Air flow, air pressure,  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 air flow, comfort and IAQ probes make the testo 400 the perfect partner for your day-to-day work.
    • Smart, intuitive measurement programs including HVAC volume flow grid measurement as per ASHRAE 111, PMV/PPD and turbulence as per ASHRAE 55

    • High-precision, location-independent and integrated differential pressure sensor meeting the NEBB Instrument requirements for Air pressure

    • Measure all Air flow, Comfort and IAQ-related parameters – with our wide range of probes

    • 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 510i - Differential pressure manometer wireless Smart Probe

    Order-Nr. 0560 1510

    The testo 510i Smart Probe is a wireless differential pressure probe used for accurate low-pressure measurements.  The testo 510i is great for measuring pressure in manifolds, static pressure, and pressure drops in buildings or ventilation systems.  Use it to measure the pressure drop across coils and filters, or in ducts and systems.
    • Measures static pressure, air flow, and volume flow (pitot tube not included)

    • Measures manifold pressure and pressure drop across filters and coils, and has a measurement menu in the Smart Probes app that includes pressure drop alarms

    • Easy configuration and calculations for volume flow (enter pitot tube factor and dimensions easily)

    • Magnetic back holds instrument for hands-free operation

  • testo 440 - Hot wire kit (Ø 0.35")

    Order-Nr. 0563 4400

    This testo 440 kit is great for carrying out measurements in ventilation ducts. The testo 440 air velocity and IAQ measuring instrument and its hot wire probe (Ø 0.35") with temperature sensor can all be safely stored in the included case.
    • Intuitive: Clearly structured measurement menus for volume flow, parallel determination of air velocity, and air temperature in ventilation ducts

    • Convenient: Integrated telescope with scaling can be extended up to 2.8 feet, making it easy to carry out all kinds of measurements

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

    • Versatile: Your testo 440 setup can be expanded with a large selection of digital probes

  • testo 440 - Vane kit (Ø 0.63")

    Order-Nr. 0563 4401

    This testo 440 kit is great for carrying out measurements in ventilation ducts. The testo 440 air velocity and IAQ measuring instrument and its vane probe (Ø 0.63") can all be safely stored in the included case.
    • Intuitive: Clearly structured measurement menus for volume flow and determination of air velocity in ventilation ducts

    • Convenient: Integrated telescope with scaling can be extended up to 2.8 feet, making it easy to carry out all kinds of measurements

    • Reliable: Internal memory for data storage and USB port for data export

    • Versatile: Your testo 440 setup can be expanded with a large selection of digital probes

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