testo 550 Smart Refrigerant Manifold Set with Filling Hoses (0564 5503)

Pressure measurement from -1 to 60 bar with ±0.5% full-scale accuracy at 22°C makes the testo 550 Smart a precise tool for HVAC/R service. The set includes three filling hoses in blue, red, and yellow.

Overview

The testo 550 Smart is a digital manifold for maintenance and troubleshooting of refrigeration systems and heat pumps. It measures high and low pressure, calculates evaporation and condensation temperatures, and displays superheating and subcooling. Bluetooth 4.0 connects to the Testo Smart App for live data, refrigerant updates, and reporting.

What stands out

• 60 refrigerants stored, updateable via app
• Illuminated graphic display for clear readings
• Robust housing with metal frame
• 2-way valve block and three 7/16" UNF connections
• Battery life up to 250 hours without backlight and Bluetooth

Technical details

• Pressure range: -1 to 60 bar / -14.7 to 870 psi
• Pressure accuracy: ±0.5% FS at 22°C
• Overload pressure: 65 bar / 940 psi
• Temperature range (external probes): -50 to +150°C / -58 to +302°F
• Operating temperature: -10 to +50°C / 14 to 122°F
• Storage temperature: -20 to +60°C / -4 to +140°F
• Protection class: IP42
• Power: 4 x AA batteries

Our verdict

The testo 550 Smart combines reliable pressure and temperature measurement with app connectivity, making it a solid choice for technicians who need accurate data and easy documentation.