Testo 550i Digital Manifold - 0564 2550


0564 2550

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The testo 550i digital manifold enables digitally versed technicians to control their daily servicing and maintenance work on refrigeration and air conditioning systems and heat pumps entirely via App and smartphone/tablet.

Equipped with a 2-way valve block and robust 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 via the testo Smart App 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.


  • 92 Built in refrigerants
  • -1 to 60 Bar Pressure
  • Equipped with a 2-way valve block with three connections (3 x 7/16" – UNF) and robust hook
  • The smallest digital manifold on the market
  • Robust housing with IP 54 protection class
  • From measurement through to documentation, all controlled using the Testo Smart App on your Smartphone or Tablet
  • 92 selectable refrigerants in the instrument
  • Refrigerant management in the App with favourites and automatic updates


  • Testo 550i App-controlled digital 2-way manifold
  • Batteries
  • Testo Smart App (free download)
  • Certificate of conformity and user's manual

Also available in a smart kit. Go to: Testo 550i Digital Manifold Smart Kit 0564 3550


Pressure measurement
Measuring range -1 to 60 bar
Accuracy ±0.5 % fs
Resolution 0.01 bar
Probe connection 3 x 7/16" – UNF
Overload rel. (high pressure) 65 bar


General technical data
Operating temperature -10 to +50 °C
Storage temperature -20 to +60 °C
Protection class IP54
System requirements requires iOS 11.0 or newer; requires Android 6.0 or newer; requires mobile end device with Bluetooth 4.0
Product colour Black
Auto-off 10 min*
Battery type 3 AAA micro batteries
Battery life 130 h
Data transfer Bluetooth®
Radio range 150 m
Refrigerants in instrument R407H; R23; R290; R1234yf; R442A; R134a; R123; R452B; R438A; R421A; R453a; R401B; R1233zd; R410A; R407A; R407C; R452A; R401A; R422C; R427A; R422B; R424A; R125; R414B; R404A; R408A; R448A; R422D; R12; R114; R421B; R449A; R409A; R420A; R444B; R32; R454A; R124; R402A; R450A; R407F; R416A; R13; R437A; R1234ze; R454B; R402B; R22; R434A; R454C; R455A; R458A; R500; R502; R503; R507; R513A; R600a; R718 (H₂O); R744 (CO₂)
Refrigerants update via App R11; FX80; I12A; R1150; R1270; R13B1; R14; R142B; R152A; R161; R170; R227; R236fa; R245fa; R401C; R406A; R407B; R407D; R41; R411A; R412A; R413A; R417A; R417B; R417C; R422A; R426A; R508A; R508B; R600; RIS89; SP22
Weight 595 g
Dimensions 77 x 109 x 63 mm


Buy with 100% confidence knowing your purchase is backed by the full Manufacturer's Warranty. Please register your product with provided warranty card.


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