Absolute pressure

Also known as relative or static pressure, absolute pressure applies to the vacuum of free space. Calculating absolute pressure is relatively tricky, as it involves adding gauge pressure to atmospheric pressure. Absolute pressure serves as a point of reference for HVAC technicians.

For example, depending on system settings, building location and other factors, atmospheric pressure is not constant across different situations. Static pressure eliminates this variability by providing a constant point of citation. Testo’s absolute pressure meters is the preferred choice among HVAC technicians. 
 
Did you know: Absolute pressure relates to the vacuous space of the universe (zero pressure).

35 products or recommendations for Absolute pressure
  • testo 511 - Pressure Meter Absolute 

    Order-Nr. 0560 0511

    Small, handy and practical: the testo 511 absolute pressure meter measures absolute pressure and is also suitable for measuring the barometric altitude between two points. 
    • Calculation of barometric air pressure 

    • Barometric altitude measurement 

    • 8 switchable pressure units 

    • Easy to use; backlit display for use in all lighting conditions 

    $287.00
    incl. GST  $315.70
  • testo 635-1 - Thermohygrometer 

    Order-Nr. 0560 6351

     
    • Dual Probe Measurement 

    • Measurement of air moisture, material equilibrium moisture, pressure dew point 

    • U - Value probe connection 

    • Protection class IP54 

    $566.00
    incl. GST  $622.60
  • testo 622 - Indoor Climate Meter 

    Order-Nr. 0560 6220

    The Testo 622 indoor climate meter is designed to provide you with an at-a-glance look at the air temperature, relative humidity and air pressure. Ideal for monitoring the ambient air, especially in laboratories. 
    • Measures air temperature, relative humidity and pressure 

    • Alarm alerts when threshold is exceeded 

    • Real time measurement values with date and time 

    • Automatic calibration reminder 

    $405.00
    incl. GST  $445.50
  • 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 

    Price on Request
  • testo 176 P1 - Pressure Data Logger 

    Order-Nr. 0572 1767

    The Testo 176P1 is a 5 channel data logger. It has an internal absolute pressure sensor and connection possibilities for two external temperature/humidity probes. 
    • 3 Parameters in 1 Temperature, Humidity & Pressure 

    • Large memory, 2 Million Readings 

    • Data transfer possible using the USB port
      or SD card (Optional) 

    • Simple and large easy to read display 

    $982.00
    incl. GST  $1 080.20
  • 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 

    Price on Request
  • testo 635-2 - Temperature and moisture meter

    Order-Nr. 0563 6352

    The Testo 635-2 is an instrument designed for measuring air moisture, material equilibrium moisture and pressure dewpoint in compressed air systems. Moisture characteristics can be recorded in the instrument memory and analysed and displayed in graphics or tables. Precision probes up to -60°C tpd are available to check pressure dewpoint in compressed air systems. 
    • Dual Probe Measurement 

    • Measurement of air moisture, material equilibrium moisture, pressure dew point 

    • U - Value probe connection 

    • Internal Memory 10,000 Readings 

    $838.00
    incl. GST  $921.80
  • 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 

    Price on Request
  • 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

    Price on Request
  • 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

    Price on Request
  • 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

    Price on Request
  • 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 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

    Price on Request
  • 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

    Price on Request
  • testo 549i - High-pressure gauge operated via smartphone

    Order-Nr. 0560 2549 02

    The professional and compact testo 549i high-pressure gauge can be controlled via the testo Smart Probes App using your smartphone or tablet, and is ideal for carrying out servicing and troubleshooting on air conditioning and refrigeration systems. The App also enables evaporation and condensation temperatures to be calculated automatically.
    • Measurement of high and low pressure

    • Low refrigerant loss – since no hoses are required for measurements

    • Measurement data displayed in the form of a graph or table, and sent via testo Smart Probes App

    • Problem-free application at measuring points that are a long distance apart thanks to Bluetooth® range up to 100 m

  • Comfort level probe - for degree of turbulence measurement according

    Order-Nr. 0628 0143

    The comfort probe (with the appropriate measuring instrument) is ideally suited for determining indoor air turbulence in accordance with EN 13779.
    • Turbulence measurement in accordance with EN 13779

    • Determination of air velocity and draught risk

    • Integrated temperature and ambient pressure measurement

    • Intelligent calibration concept

    $1 234.00
    incl. GST  $1 357.40
  • ComSoft Professional - software

    Order-Nr. 0554 1704

    The ComSoft Professional software means you get software for programming and readout of Testo data loggers and for archiving data. It offers analysis and display possibilities over and above the basic functions.
    • Professional software for programming and readout of Testo data loggers and for archiving data

    • Graphic and tabular display of all measurement parameters

    • Effortless creation and management of reports

    • Intuitive user interface for efficient work

    $509.00
    incl. GST  $559.90
  • Absolute pressure probe 2000 hPa

    Order-Nr. 0638 1835

    Absolute pressure probe 2000 hPa
    $668.00
    incl. GST  $734.80
  • testo ComSoft Basic - Logger software

    Order-Nr. 0572 0580

    Free download: testo ComSoft Basic for programming and reading Testo data loggers.
    • Programme and read out Testo data loggers using the basic software

    • Particularly clear: graphic and tabular display of readings

    • Convenient export functions, e.g. for further processing of data in Microsoft Excel or generation of a PDF

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