Image
  1. Home
  2. testo 550i
0564 2550 01

testo 550i - App-controlled digital manifold with Bluetooth and 2-way valve block

testo 550i
testo 550i
application testo 550i
application testo 550i
testo 550i
testo 550i
testo 550i
testo 550i
testo 550i
testo 550i
The testo 550i app-controlled digital manifold with Bluetooth ®, 2-way valve block and sturdy hook offers extensive measurement technology in an exceptionally compact format. Use this extremely robust manifold to carry out your everyday work on refrigeration and air conditioning systems and heat pumps wirelessly, with ease and reliability. All using the testo Smart App on your smartphone or tablet.

*A2L Compliant*
  • All activities, from measurement through to documentation, 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
  • Optional expandibility with testo Smart Probes for temperature, humidity and vacuum
From the measurement itself through to the documentation – thanks to the app, you can have your everyday servicing and maintenance work on your smartphone or tablet. The testo 550i digital manifold is equipped with Bluetooth, 2-way valve block and a sturdy hook, and can be fully controlled via app and smartphone or tablet – for flexible, fast measurements and digital documentation.
 
 

testo 550i – App-controlled digital manifold with Bluetooth and 2-way valve block

  • For carrying out exceptionally fast, easy measurements on refrigeration and air conditioning systems and heat pumps
  • testo Smart App: Control your servicing and maintenance tasks completely via app and smartphone or tablet, enjoy clearly presented results and digital documentation, set your own favourites, and always have the latest refrigerants
  • Maximum reliability and convenient handling in environments that are difficult to access thanks to an exceptionally compact, extremely robust housing with IP54 protection class
  • Maximum flexibility for working wirelessly: Bluetooth probes for temperature, pressure and humidity automatically connect to the measuring instrument via the testo Smart App
  • Continuously high performance in all conditions: You can depend on this manifold from Testo – it combines proven Testo quality with excellent robustness

Pressure measurement

Measuring range
-15 to 870 psi / -1 to 60 bar
Accuracy
±0.5 % Fs
Resolution
0.14 psi / 0.01 bar
Probe connection
3 x 7/16" – UNF
Overload rel. (high pressure)
943 psi / 65 bar

General technical data

Weight
20.99 oz. / 595 g
Dimensions
3.03 x 4.29 x 2.48 in. / 77 x 109 x 63 mm
Operating temperature
14° to 122 °F / -10 to +50 °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 life
130 h
Battery type
3 x AAA
Data transfer
Bluetooth®
Radio range
492.12 ft. / 150 m
Refrigerants in instrument
R114; R12; R123; R1233zd; R1234yf; R1234ze; R124; R125; R13; R134a; R22; R23; R290; R32; R401A; R401B; R402A; R402B; R404A; R407A; R407C; R407F; R407H; R408A; R409A; R410A; R414B; R416A; R420A; R421A; R421B; R422B; R422C; R422D; R424A; R427A; R434A; R437A; R438A; R442A; R444B; R448A; R449A; R450A; R452A; R452B; R453a; R454A; R454B; 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; Ra11A; R412A; R413A; R417A; R417B; R417C; R422A; R426A; R508A; R508B; R600; RIS89; SP22
Refrigerant
A2L / A3 compatibel
Storage temperature
-4° to 140 °F / -20 to +60 °C
* when not connected via Bluetooth
testo 550i digital 2-way manifold including batteries (3 x AAA), calibration protocol and instruction manual.
 
 Testo has put together the practical testo 550i Smart Kit for you – so you’ll be optimally equipped to tackle your measuring tasks right away.

Temperature probes

testo 915i

: 0563 4915 01

testo 915i - testo 915i - Wireless thermometer with flexible temperature probe (TC type K) and smartphone operation

Smart Probe for wireless temperature measurement in a wide range of applications, thanks to a large selection of probes and compatibility with standard type K thermocouple probes

$ 162.00
Pipe wrap probe with Velcro

: 0613 4611

Velcro Pipe Wrap Probe (NTC) - Pipe probe

With Velcro: makes it easy to attach the surface probe to pipes with a pipe diameter of up to 75 mm

$ 127.50

Sets

Image

: 0564 3550 01

testo 550i Smart Kit - App-controlled digital manifold with wireless clamp temperature probes (NTC)

All activities, from measurement through to documentation, using the App on your Smartphone

$ 588.00
Image

: 0564 4550 01

testo 550i Smart Kit - App-controlled digital manifold with wireless vacuum and wireless clamp temperature probes (NTC)

All activities, from measurement through to documentation, using the App on your Smartphone

$ 667.00
Image

: 0564 5550 01

testo 550i Smart Kit - App-controlled digital manifold with wireless clamp temperature probes (NTC) and wireless thermohygrometers

All activities, from measurement through to documentation, using the App on your Smartphone

$ 709.00

Refrigeration systems, air conditioning systems, heat pumps, ductless, single zone, multi zone, mini split systems

  • Determination of high and low pressure, automatic determination of condensation and evaporation temperature and calculation of superheating/subcooling. All the results can be read simultaneously on one display (in conjunction with the appropriate Testo Smart Probes)
  • Tightness test: Recording and analysis of the pressure curve
  • Automatic calculation of the target superheat (in conjunction with the testo Smart App and the appropriate Testo Smart Probes, e.g. testo 115i and testo 605i)
  • Evacuation: Graphic progression display of the measurement with indication of the start and differential value (in conjunction with the appropriate Testo Smart Probe, e.g. testo 552i vacuum probe)

Accessories

testo 560i kit delivery

: 0564 2560 01

testo 560i Kit - Digital Refrigerant Scale and Intelligent Valve with Bluetooth

Automatic and precise refrigerant charging according to target superheat, supheat, subcooling or weight with the intelligent valve

$ 689.00
testo 560i delivery

: 0564 1560 01

testo 560i - Digital Refrigerant Scale with Bluetooth 

Wireless measurement of refrigerant weight and operation with Testo manifolds and testo Smart App via Bluetooth

$ 440.00
testo Smart APP

: 0501 5001

testo Smart App

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

PC Software testo DataControl

: 0501 4000

testo DataControl v30.2.4 - PC software

PC software for the readout, analysis and archiving of customer and measurement data 

Magnetic strap

: 0564 1001

Magnetic strap - for digital manifolds

Strong magnet and sturdy strap

$ 86.00
Valve replacement kit 0554 5570

: 0554 5570

Digital manifolds - Valve replacement kit

Immediate valve positioner replacement on site

$ 60.00
Headquarters
Testo Inc.
40 White Lake Road
07871Sparta
New Jersey
800-227-0729

© 2026