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).

30 Products found
  • testo 511 - Absolute Pressure Meter

    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.

    • High-precision absolute pressure measurement with an accuracy of ±3 hPa

    • Suitable for barometric altitude measurements

    • Calculates the barometric air pressure

    • 8 pressure units available
       

  • testo 622 - Hygrometer with Pressure Indication

    Order-Nr. 0560 6220

    The testo 622 thermo hygrometer and barometer 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 during calibration or when running experimental setups.

    • Measures air temperature, relative humidity and pressure

    • Ideal for monitoring the ambient air especially in laboratories

    • Alarm alerts when threshold is exceeded

    • Table or wall mount

  • testo 635-2 - Thermohygrometer

    Order-Nr. 0563 6352

    The testo 635-2 temperature and moisture meter allows you to carry out temperature and moisture measurements on a variety of different materials, surfaces and environments. This is made possible due to leading-edge technology and a wide selection of optionally available sensors.

    • Optionally available sensors for moisture, temperature, pressure dew point and absolute pressure measurements

    • 2 plug-in sensors and 3 wireless sensors can be connected

    • Super-size memory for up to 10 000 readings

    • USB cable and PC software for archiving and logging measuring data included

  • testo 635-1 - Temperature and Humidity measuring instrument

    Order-Nr. 0560 6351

    The testo 635-1 temperature and humidity measuring instrument enables you to measure the temperature, air humidity and dew point – in compressed air as well. State-of-the-art technology and a large selection of probes, which are available as an option, enable this wide variety of measuring possibilities.

    • Probes available as an option mean you can measure air humidity, temperature, absolute pressure and dew point in compressed air

    • Two plug-in probes and 3 radio probes can be attached

    • Calculates dew point and dew point distance

    • Display of min., max. and mean values

  • testo 549i - Bluetooth High-pressure Gauge Smart Probe

    Order-Nr. 0560 1549

    The professional and compact testo 549i high-pressure measuring instrument 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

    • Quick and easy installation at the pressure connection

    • Low refrigerant loss thanks to hose-free application

    • Measuring range -1 to +60 bar

  • testo 176 P1 - Absolute Pressure Data Logger

    Order-Nr. 0572 1767

    When ambient conditions, for example in a laboratory, need to be documented securely and highly accurately, the testo 176 P1 is the right data logger. It has an integrated absolute pressure sensor and connection possibilities for two external temperature/humidity probes (optional).

    • Continuous measurement and documentation of absolute pressure

    • Record up to two additional humidity and temperature values simultaneously with optionally connectable probes

    • Large measurement data memory for up to 2 million measurement values, battery life of up to 8 years

    • For data evaluation on a PC, a selection of three software versions is available, basic software available as a free download

  • testo 557 - Digital Manifold Set (Bluetooth) (without sight glass)

    Order-Nr. 0563 1558

    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)

  • testo 480 - High-end VAC measuring instrument

    Order-Nr. 0563 4800

    Air flow measurements in ducts, temperature measurements in laboratories, humidity measurements in production, pressure difference measurements in clean rooms. The testo 480 digital temperature, humidity and air flow meter comes with a wide range of optional sensors that allow you to measure, analyse and log these and a variety of other parameters with only one device.

    • High-quality optional sensors for measuring air flow, temperature, humidity, pressure, degree of turbulence, heat radiation, CO2, illumination intensity, PMV/PPD and WBGT

    • High-precision, integrated pressure sensor included

    • Pro-software for easy and efficient analysis and logging included

    • Intelligent calibration concept

  • testo 550 - Digital manifold

    Order-Nr. 0563 1551

    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)

  • testo 435-2 - Multifunction indoor air quality meter

    Order-Nr. 0563 4352

    The testo 435-2 indoor air quality meter allows you to carry out all the measurements that are necessary to check and adjust ventilation and air conditioning systems and assess the quality of the indoor air. Select from a wide range of probes and sensors. Because it’s you know best what your meter needs to be able to do!

    • Comprehensive range of measuring functions using optionally available accessories – e.g. anemometers, moisture sensors, lux and degree of turbulence sensors

    • Super-size memory for up to 10 000 readings

    • Displays dew point difference, min, max and mean values

    • PC software for analyzing and logging measuring data

  • testo 435-4 - Multifunction indoor air quality meter

    Order-Nr. 0563 4354

    The testo 435-4 multifunction indoor air quality meter allows you to carry out all the measurements you need to inspect and adjust ventilation and air conditioning systems and to check the quality of the indoor air. There is also an integrated pressure difference sensor for pitot static tube measurements and filter monitoring and a wide range of optionally available sensors and probes to choose from.

    • Includes pressure difference sensor for pitot static tube measurements or filter monitoring

    • Further sensors optionally available (eg. anemometer, moisture sensors, lux and degree of turbulence sensors) for a variety of different measuring applications

    • Super-size memory for up to 10 000 measurements

    • PC software for analyzing and logging measuring data

  • 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

  • testo 549 - 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): saves you from having to carry

    • Temperature-compensated leakage test

    • Two temperature-compensated pressure sensors

  • testo 552 - Digital Vacuum Gauge (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

  • testo 435-3 - Multi-function climate measuring instrument

    Order-Nr. 0560 4353

    testo 435-3 – multi-function climate measuring instrument with integrated differential pressure measurement. You can use this to carry out measurements which you need to adjust ventilation and air conditioning systems and assess room air quality. For this we offer a comprehensive range of optional probes and sensors to choose from.

    • Includes differential pressure measurement for filter monitoring or for measurement with a Pitot tube

    • Further optional probes can be attached: thermal and vane anemometers, along with probes for air humidity, CO2, absolute pressure and temperature

    • Display of dew point distance, min., max. and mean values

    • Illuminated display

  • Comfort probe for turbulence measurement

    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

  • ComSoft Basic - Logger software

    Order-Nr. 0572 0580

    ComSoft Basic, Basic software for programming and readout of Testo data loggers; graphic and tabular measurement value presentation as well as export function

30 Products found
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