Testo 550s Smart Kit - Smart Digital Manifold with Wireless Clamp Temperature Probes

Brand: Testo

The kit for wireless measurements in the field of commissioning, servicing and maintenance of refrigeration and air conditioning systems and heat pumps: You will get the Testo 550s smart digital manifold with Bluetooth and 2-way valve block, two Testo 115i wireless clamp thermometers (Bluetooth, NTC) and a robust transport case.

Additional Bluetooth probes, e.g. for wireless, hose-free vacuum measurements with the Testo 552i, are available separately.
  • All results at a glance thanks to the large graphic display
  • Exceptionally compact and reliable thanks to the easy-to-handle, robust housing with IP 54 protection class
  • Easy, wireless, flexible measurements and documentation: Temperature and vacuum measurements via automatic Bluetooth®
  • In the kit: Testo 550s smart digital manifold with Bluetooth and 2-way valve block, 2 x Testo 115i wireless clamp temperature probes (Bluetooth, NTC), case



Delivery Scope

  • Testo 550s digital 2-Way manifold including batteries (4 x AA) and Calibration Protocol
  • 2 x Testo 115i Wireless Bluetooth Clamp Thermometers
  • Transport case
  • Testo Smart App (free download)
  • Instruction manuals

Pressure Measurement

  • Measuring Range: -1 to 60 bar
  • Accuracy: ± 0.5 % Full Scale
  • Resolution: 0.01 bar
  • Probe Connection: 3 x 7/16”-UNF
  • Overload Relative (High Pressure): 65 bar


  • Measuring Range: -50° C to +150° C
  • Accuracy: ± 0.5° C
  • Resolution: 0.1° C
  • Probe Connection: 2 x plug-in (NTC)

Temperature - NTC

  • Measuring Range: -40° C to +150° C
  • Accuracy: ± 1.3° C (-20° C to +85° C)
  • Resolution: 0.1° C


  • 826 g
  • 127.4 g


  • 210 x 121 x 60 mm
  • 183 x 90 x 30 mm

Operating Temperature

  • -20° C to +50° C

Product / Housing Material

  • Plastic

Protection Class

  • IP54

System Requirements

  • Requires iOS 13.0 / 12.0 or newer
  • Requires Android 8.0 / 6.0 or newer
  • Requires Mobile end device with Bluetooth 4.0

Product Colour

  • Black
  • Black/Orange


  • 10 min (when not connected via Bluetooth)

Battery Type

  • 4 x Type AA Batteries
  • 3 AAA Micro Batteries

Battery Life

  • 250 h with no illumination, no Bluetooth
  • 100 h with illumination and Bluetooth
  • 150 h

Data Transfer

  • Bluetooth

Radio Range

  • 150 m
  • 100 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

Storage Temperature

  • -4° F to 140° F / -20° C to +60° C

System Requirements (Testo Smart App)

  • Requires iOS 13.0 or newer
  • Requires Android 8.0 or newer
  • Requires mobile end device with Bluetooth 4.0

  • Refrigeration Systems, Air Conditioning Systems, Heat Pumps
    • Determination of High and Low Pressure, Automatic Determination of Condensation and Evaporation Temperature and Calculation of Superheating/Subcooling. All Results can be read Simultaneously on One Screen
    • Tightness Test: Recording and Analysis of the Pressure Curve
    • Automatic Calculation of the Target Superheat (in Conjunction with the Appropriate Measuring Instrument, e.g. Testo Smart Probe)
    • Measure Vacuum: Graphic Progression Display of the Measurement with Indication of the Start and Differential Value
    • 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)
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