Testo 550s Digital Manifold (2-Way Valve Block)
The Testo 550s Digital Manifold is equipped with Bluetooth and 2-way valve block for commissioning, servicing and maintenance of refrigeration systems and heat pumps.
The units large display also helps you evaluate the results in graphic form and it‘s stored programs will guide you through the measurement enabling the automatic determination of numerous important system parameters such as superheat, pressure drop test or evacuation.
Bluetooth probes for temperature, pressure and humidity can be easily connected directly to the instrument and offer maximum flexibility in their application. In conjunction with the Testo Smart App, you can take care of digital documentation directly on site. In addition to this, you always have the current refrigerants available to you, and can set your favourites and transfer them to the instrument. Its proven quality and great durability guarantee the continuously high performance of your manifold in all conditions.
Testo 550s Key Features:
- 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
- Simple, wireless measurement of vacuum and temperature via automatic Bluetooth connection
- Even greater flexibility for your measurements and documentation with the Testo Smart App
- Even easier to get results, thanks to guided measurement menus for target superheat, vacuum and pressure loss
- Convenient refrigerant management in the App with favourites and automatic updates
- Can be used for applications with A2L refrigerant, taking into account the relevant legislation, norms and guidelines for refrigeration systems
▶ Testo 550s Videos
Video: Testo 550s Launch Video...

Video: Testo Smart Probes...

Testo 550s Applications:
- 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, eg. 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, eg. testo 552i vacuum probe)
The various models of the Testo 550s:
- (0564 5501) Testo 550s Digital Manifold ONLY
- (0564 5502) Testo 550s Digital Manifold Smart Kit
- (300564 5502) Testo 550s Digital Manifold Heat Pump Kit
What comes with the Testo 550s (0564 5501)?
Testo 550s Digital Manifold
- Testo 550s Digital 2-Way Manifold
- Batteries (3 x AA)
- Calibration Protocol
- Instruction Manual
- Testo Smart App (free download)
What extra comes with the Smart Kit (0564 5502)?
Testo 550s Digital Manifold – Smart Kit
Extra to the standard model:
- 2 x Testo 115i Wireless Bluetooth Pipe Clamp Thermometers
- Carry Case
What extra comes with the Heat Pump Kit (300564 5502)?
Testo 550s Digital Manifold – Heat Pump Kit
Extra to the standard model:
- 2 x Testo 115i Wireless Bluetooth Pipe Clamp Thermometers
- 1 x Testo 770-3 Clamp Meter
- Carry Case
What is Testo SightGlass?
The term "Testo Sightglass" refers to the integrated sight glass feature found in certain Testo Digital Manifold gauges. This component allows HVAC/R technicians to visually monitor the flow of refrigerant within a system, aiding in diagnostics and system assessments.

0564 2550 / 0564 3550 / 300564 3550 03