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Vacuum gauge

High-precision vacuum measurement is an absolute must when it comes to the evacuation of heat pumps, air conditioning, and refrigeration systems. Vacuum gauges which enable remote monitoring via smartphone and tablet are becoming increasingly popular.

What is a Testo vacuum gauge capable of? Everything!

Testo's vacuum gauges are not only first class in technical terms, but also extremely intuitive to use. Because high-precision measuring values are one key issue – a smooth work flow is another. A Testo vacuum gauge offers you the following:

  • All the values you want to know for the reliable evacuation of heat pumps or refrigeration systems. High precision.

  • A robust, water and dust-resistant housing.

  • Optical alarm and illuminated display.

  • A SMART Digital Vacuum Gauge with Smart App: for SMART vacuum measurement via smartphone/tablet.

Classic gauge or SMART Digital Manifold?

Evacuate systems safely: Here you will find your ideal measuring device for vacuum.

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Vacuum measurement – how-to:

It is self-evident (for us at Testo) that a vacuum gauge provides values of the highest possible precision. But that's not enough. Because it is not just the low pressures, but also the small details that make the evacuation of refrigeration systems or heat pumps smooth in the first place. This is what will make you happy, when you start the vacuum measurement. They include:

Simple measurements even under pressure: good tips and the right vacuum gauge

Vacuum measurement involve very low pressures and extremely small forces. A quick reminder: pressure is the force exerted by gas molecules on the vessel wall – in more precise terms, their impacts. The lower the pressure falls, the sensors must be more precise, to be able to measure these effects. Testo high-precision vacuum gauges can become even more precise if you follow these tips for vacuum measurement:

Vacuum measurement – what it's all about

When commissioning heat pumps, air conditioning and refrigeration systems, vacuum gauges are used, always in conjunction with a vacuum pump that creates the vacuum in the system. In this respect, your vacuum gauge should always meet the following requirements:

  • Pressure sensor with a high level of accuracy in the lower measuring range (e.g. a Pirani probe).

  • Wireless monitoring of absolute pressure.

  • Measurement of the evaporation temperature of H₂O.

  • Optical alarm when a limit value is exceeded.

Do you already have a vacuum gauge?

A SMART Digital Manifold is the perfect addition.

Testo is always working to develop the perfect measuring instrument for everything that can be measured as well. "Be sure" – you can be sure – we promise you, and by this we do not just mean the precision of our vacuum gauges. But that you will find exactly the right measuring instrument to deal with every measuring task in industry, research, technology, and trade.

testo Smart App

One App for all applications.

The testo Smart App guides you quickly and easily through measurements on refrigeration, air conditioning and heating systems

Now new:

PRO measuring programs for increasing the efficiency of your applications

Find out more


Compatible with all Bluetooth-enabled Testo measuring instruments


Direct report dispatch by e-mail


All measurement values at a glance


Intuitive measurement menus


Free download, free use


PRO Measuring Programs