Testo's New Digital Manifold Buying Guide

Everything at a glance.
In your hand.

Fast measurement and easy operation via large graphic display and your smartphone – and yet extremely compact and rugged.

The new digital manifolds from Testo.

Testo’s new generation of digital manifolds provides both the functionality and technology required by today’s HVAC technician. Wireless probes, Bluetooth 5.0 and easy reporting in the Testo Smart app, all combine to simplify your next job and make workflows more efficient. And with several models, packages and accessories to choose from, Testo offers something for everyone.

Testo’s new manifolds are available in packages with wireless vacuum probes, wireless temperature clamps, as well as wireless thermohygrometers and hoses. You simply order one item and it comes with everything you need.

This product release contains three manifold series, the 550i, 550s and 557s - each of which are shown in greater detail below. The 550i is very compact and does not have a screen – results are viewed on your mobile device via Testo’s app. The 550s and 557s both contain a screen for viewing test results –the 550s contains a 2 way valve block, while the 557s has a 4 way valve block.

The 550s and 557s

The 550s and 557s feature large, clear, graphic displays and Bluetooth connectivity. This provides all values at a glance, and the commissioning, service and maintenance of air conditioning and refrigeration systems are carried out faster and more easily than ever before.

  • Exceptionally compact and reliable thanks to the easy-to-handle, rugged housing with IP54 protection class
  • Simple, wireless measurement of vacuum and temperature via automatic Bluetooth connection
  • Even greater flexibility for your measurements and documentation with the testo Smart App

The 550i

Unlike the 550s and 557s, the 550i does not have a screen - it is designed to connect directly to your mobile device.

  • All activities, from measurement through to documentation, are performed using the Testo Smart App on your smartphone
  • The smallest digital manifold on the market
  • Maximum reliability thanks to the extremely rugged housing with IP54 protection class
  • Optionally expandable with testo Smart Probes for wireless measurement of temperature, humidity and vacuum

To view the 550i, please click here.

552i Vacuum Gauge

The 552i enables users to wirelessly measure vacuum with speed, ease and precision via just one service port – with no loss of refrigerant.The Testo Smart App supports you with numerous intelligent features – for example, you can see the vacuum by simply glancing at the graphic illustration in the app or on the manifold’s display.

The 552i vacuum gauge is available in several 550i, 550s and 557s manifold packages, and can also be purchased separately.

  • Identify vacuum quickly and easily by means of the graphical display in the App or on the digital manifold screen
  • Connects automatically via Bluetooth to the testo Smart App and digital manifolds
  • Exceptionally compact and reliable thanks to the rugged, easy-to-handle housing with IP54 protection class
  • Easy installation at any service port thanks to the integrated 45° angle

115i Wireless Pipe Clamp Thermometer

The 115i will fit on pipes from 0.2 to 1.4 inches in diameter, and connects wirelessly via Bluetooth. No more tangled wires, simply clamp to the pipe being measured and connect to your device. The 115i runs on 3 AAA batteries with a lifespan of approxiamtely 150 hours. It is also included as a standard item in several of the 550i, 550s and 557s packages.

The Testo Smart App

With the testo Smart App, you turn your smartphone into a mobile, multi-functional command center for all applications involving refrigeration, air conditioning and heat pumps.

All in one: One App for all Bluetooth-enabled Testo measuring instruments for air conditioning/refrigeration systems and heat pumps

Quick and easy: Measurement menus for numerous applications provide optimum support in configuring and carrying out measurements, e.g. superheating/subcooling

Clear graphical presentation of readings: e.g. as a table, for quick interpretation of results

Create digital measurement reports including photos: make PDF/CSV files on site and send via e-mail
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