Testo 550i - App Operated Manifold

0564 2550 01
0564 2550 01
Minimum Purchase:
1 unit
Works with measureQuick?:
A2L Compatible?:
  • Testo 550i - App Operated Manifold
  • Testo 550i - App Operated Manifold
  • Testo 550i - App Operated Manifold
  • Testo 550i - App Operated Manifold
MSRP: $350.00
Price: $297.50
— You save $52.50


Testo 550i - App Operated Manifold

Everything on your smarthphone or tablet!

The testo 550i digital manifold enables technicians to control their daily servicing and maintenance work on refrigeration, air conditioning systems, and heat pumps entirely from their smartphone/tablet. Equipped with a 2-way valve block and rugged hook, the testo 550i saves you time with its fast and easy measurements, clearly presented results and digital documentation.

In addition, this compact instrument, designed with the most essential features, automatically connects to various Bluetooth probes for temperature, pressure and humidity, thus ensuring maximum flexibility for wireless working. Its proven quality and great durability guarantee the continuously high performance of your manifold in all conditions.


  • The smallest digital manifold on the market
  • Testo Smart App: full operation of service and maintenance tasks via app and smartphone or tablet, clearly visualized results, digital documentation, set your own favorites, always have the latest refrigerants available
  • Maximum reliability and convenient handling in difficult to access environments thanks to the particularly compact, extremely rugged housing with protection class IP54
  • Maximum flexibility, optionally expandable with testo Bluetooth Smart Probes for temperature, humidity, and vacuum
  • For particularly quick and easy measurements on refrigeration and air conditioning systems as well as heat pumps
  • Continuously high performance under all conditions: You can rely on the testo 550i manifold - it combines proven Testo quality with a high level of ruggedness

Whatever the digital manifolds are needed for – the new Testo 550 line has the right one. Compare and decide better.

Images link to best kit for the job

Testo logo Testo 550s Testo 557s Testo 550i
Testo 550s Testo 557s Testo 550i
Valve Block 2-Way 4-Way 2-Way
Large Graphic Display (App Only - Smart Device Required)
Testo Smart App Compatible Bluetooth 5.0 (range up to 500 feet) Bluetooth 5.0 (range up to 500 feet) Bluetooth 5.0 (range up to 500 feet)
Smart Probe Compatible ✓ (with automatic connection) ✓ (with automatic connection) ✓ (with automatic connection)
Compact one-hand opperation ✓ (ultra-compact)
Protection Class IP54 IP54 IP54
Identical Pressure Measuring Range HP/LP up to 870 psi up to 870 psi up to 870 psi
Pressure Accuracy Measurement > 0.5 % of fs > 0.5 % of fs > 0.5 % of fs
Integrated Temperature Measurement ✓ (up to 2 temperature probes + Bluetooth probe) ✓ (up to 2 temperature probes + Bluetooth probe) ✓ (up to 2 temperature probes + Bluetooth probe)
Target Superheat on Manifold or App ✓ (Both) ✓ (Both) ✓ (App Only)
Data documented and sent via App
Refrigerants Stored 90 90 90
Refrigerant Update automatically via App
Suitable for A2L Refrigerants
Testo PC Software (Optional)


Testo 550i Manifold
Pressure Range -14 to 870 psi
Pressure Accuracy (at 72 °F) ±0.5% fs
Pressure Resolution 0.1 psi
Pressure Overload 940 psi
Operating temperature 14 to 122 °F
Storage temperature -4 to 140 °F
Battery type 3 AAA batteries
Battery Life 130 hrs
Auto power off After 10 minutes when not connected via Bluetooth
Dimensions 3.03 x 4.29 x 2.36 in.
Weight 1.3 lbs.
Protection class IP54
Bluetooth Bluetooth 5.0 (490ft)
Compatibility Requires iOS 11.0 or newer
Android 6.0 or newer
Requires mobile device with Bluetooth 4.0


  • (1) Testo 550i - App Operated Manifold
  • (1) Calibration Certificate
  • (1) Manual
  • (1) Batteries


Software / App

Download the Testo Smart App for your Android or iOS devices today!

Google Play Store Apple App Store

Welcome to the new, digital age of measurement technology. With the testo Smart App, you turn your smartphone into a mobile, multi-functional command center for all applications involving refrigeration, air conditioning and heating systems. Together with the Bluetooth-enabled measuring instruments and Smart Probes from Testo, this equips you optimally for the future. And everything which comes after it.

All applications of the new digital manifolds on your smartphone: With the new testo Smart App, you can evaluate results even faster Additionally, it helps you to avoid measurement errors, as stored measurement programs guide you step by step through the configuration and measurements. With the integrated documentation functions, reports can be created on site, and digital measurement protocols, including photos, can be sent as PDF or CSV files directly by e-mail. You can also set up customer data and measurement sites at the touch of a button, and synchronization with the free testo DataControl PC software is done wirelessly via Wi-Fi.

Works with:

  • All Testo 550s, Testo 557s and Testo 550i digital manifolds
  • All Testo smart probes
  • Testo 552i vacuum gauge
  • Testo 770-3 clamp meter

App Features:

  • All in one - All Smart Probes and Bluetooth-capable Testo measuring instruments for refrigeration, air conditioning and heating systems and heat pumps combined in one App
  • Quick and easy - Measurement menus for a wide range of applications facilitate quick and easy configuration and performance of the measurement
  • Graph of values - Measured values are displayed in graphic form to enable quick reading of the results
  • Document and share - Easy creation of digital measurement protocols and documentation including photos as well as sending via e-mail

Testo Smart App Images
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