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 - 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 

    $279.40
    incl. GST
  • 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 

    $426.80
    incl. GST
  • 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 

    $816.20
    incl. GST
  • 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 

    $569.80
    incl. GST
  • testo 549 i - high-pressure measuring instrument with smartphone operation

    Order-Nr. 0560 1549

    The professional and compact testo 549i high-pressure measuring instrument can be controlled via the testo Smart Tools 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 - 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 

    $955.90
    incl. GST
  • 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 

  • testo 480 - Climate Measurement Tool 

    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 climate measurement meter with a wide range of optional probes that allows you to measure, analyse and log these and a variety of other parameters with only one device. 

    • Measure multiple parameters Temperature, Humidity, Pressure Turbulence, Heat radiation, Co2 Lux, PMV/PPD, WBGT 

    • Professional software for reporting & data logging 

    • Highly accurate digital probes 

    • Intelligent calibration concept

    $1,901.90
    incl. GST
  • 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 

  • testo 435-2 - Multi Function IAQ Instrument 

    Order-Nr. 0563 4352

    The Testo 435-2 multi function meter is designed to allow you to carry out multiple measurements that are necessary to check and adjust ventilation and air conditioning systems and assess the quality of the indoor air. 

    • Measures Multiple Parameters
      C, RH, Co2, Co, Pressure, Draught,
      Air velocity, Volumetric Flow, Turbulance,
      U Value, Lux 

    • Illuminated Display 

    • Large Range of Probes 

    • Large display 

    $1,061.50
    incl. GST
  • 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

    $1,143.00
    incl. GST
  • 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 

  • 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

    $1,347.50
    incl. GST
  • testo 552 - Vacuum Gauge 

    Order-Nr. 0560 5520

    The Testo 552 is a high-precision digital vacuum gauge that has all the measuring functions you need for evacuating refrigerant systems and heat pumps. The rugged meter is built to last and tough enough to take the odd knock. 

    • 2,400 hours of battery power / 100 days of continuous operation 

    • Maintenance-free yet high-precision absolute pressure sensor 

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

    • Measures pressure / calculates the  evaporation temperature of H2O automatically 

  • testo 435-1 - Temp, Humidity, Co2 & Absolute Pressure 

    Order-Nr. 0560 4351

    The Testo 435-1 IAQ Kit is a multifunction instrument for measuring and assessing Indoor Air Quality and for adjusting and inspecting VAC systems.The Testo 435-1 is an affordable introduction to measurement engineering for ambient air conditions. Readings from up to 3 temperature probes can be displayed on the screen. Measurement data can also be printed on site with the Testo printer. 

    • Measures Multiple Parameters
      Temperature, Humidity, CO2, Pressure 

    • Illuminated Display 

    • Large Range of Probes 

    • Large display 

    $806.30
    incl. GST
  • testo 160 IAQ - WiFi data logger with display and integrated sensors for temperature, humidity, CO2 and atmospheric pressure

    Order-Nr. 0572 2014

    From museums to offices: WiFi data logger testo 160 IAQ is ideal for monitoring indoor air quality in facility management.

    • Ideal for monitoring indoor air quality (IAQ)

    • Blends in perfectly with the surroundings thanks to an optional, customisable deco-cover

    • Perfectly networked: data storage in the Testo Cloud, real-time alarm via email or SMS (optional in conjunction with an Advanced licence)

    • Simple to install, integrate and operate – particularly user-friendly with air quality displayed in the form of a traffic light system

  • 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

    $1,225.40
    incl. GST
30 Products found
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