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Absolute pressure meter

Absolute pressure measurement is the conventional method for measuring pressure in a sealed system, for instance when venting a system with a vacuum pump or evacuating refrigeration systems or heat pumps.

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High-precision measurement, reliable monitoring

Measuring absolute pressure – your advantages with Testo

  • Compact and durable design for protecting the vacuum in the measurement sensor.

  • Also for applications in difficult-to-access or aggressive environments.

  • Very wide range of possible applications, for example in facility management, refrigeration, air conditioning and ventilation technology, laboratories and production processes.

Which pressure gauges measure absolute pressure better?

Those made by the market leader, Testo.

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What you should know about absolute pressure measurement

Depending on the application, pressure is measured either absolutely or relatively. In the process, every measured pressure relates to a reference value. With absolute pressure (notation: P abs) the reference value is absolute vacuum (0 bar) which corresponds to the vacuous space in the universe. Absolute pressure, which is not dependent on weather or height, therefore indicates the difference from the vacuum. An absolute pressure measuring instrument has three special features: 

  1. Only one hose connection.

  2. Only shows positive readings and cannot be zeroed.

  3. A sealed vacuum in the absolute pressure sensor (reference pressure).

Measure absolute pressure – common applications in industry and technology

Alongside temperature and humidity, pressure is one of the most important and frequently measured physical measurement parameters. Measurement of the absolute pressure parameter is indispensable in numerous areas of work involving heating engineering, sanitation and air quality in rooms and buildings, but also in process engineering. Whether with a pure absolute pressure meter or in combination with other relevant measurement parameters – you will find the best possible pressure measuring instrument for every application at Testo:

testo 511 pocket-sized - Small and accurate: measuring device with absolute pressure sensor

For engineers with high demands in terms of measurement data, the testo 511 is the first choice absolute pressure meter. In addition to absolute pressure, the handy instrument also measures the barometric altitude and calculates the barometric altitude pressure.

testo 511 at a glance

  • High-precision: measures absolute pressure with +/-3 hPa.

  • Large measuring range: 300 to 1200 hPa.

  • Fits in any pocket: small, handy and practical.

  • Versatile: ideal for absolute pressure compensation with flow measurements using a Pitot tube.

  • Complete: also suitable for barometric measurements (local height above sea level and air pressure at sea level)

Further pressure measurement possibilities with Testo

Pressure parameters are important measurement parameters in refrigeration, air conditioning and ventilation technology. In addition to the pure absolute pressure meter, Testo offers a complete range of all the important pressure measuring instruments – for professional and efficient work.

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