High Performance

• Two temperature inputs allow simultaneous calculations and display of superheat and subcooling. With just a press of a button, the differential temperatures are also displayed. With another press of a button, you can quickly switch between the different measurements.
   
• The testo 550 features a large, backlit LCD display. Large numbers help you quickly and easily read the values.
   
• Intuitive operation provides you the ability to quickly analyze and diagnose the system without changing connections or performing tedious calculations. In a few seconds the instrument displays all of the values you need for an accurate and precise analysis.

Extraordinary Value

• The testo 550 incorporate a compact design for ease of use, transport and set up.
   
• The testo 550 has a robust housing that protects the analyzer from the everyday bumps and drops. It is built for the field.
   
• The testo 550 is a full function analyzer. With 31 refrigerants built-in and unique temperature-compensated sensors, the testo 550 is one of the most accurate analyzers on the market. Say goodbye to the old fashioned PT charts!
   

Blazing Speed

• With a testo 550 Refrigeration System Analyzer, multiple tests are performed and calculated all at once. Just select the results you want displayed and away you go.
   
• Once connected, you can perform a leak test and monitor charging. Refrigerant flow can be monitored in the integrated sight glass.
   

Extremely easy to use

• Two direct buttons offer you more advantages – one for the display of MIN/MAX/MEAN, and the other for instant access to 31 user – selectable refrigerants.

Servicing

• With two external temperature probes, the testo 550 simultaneously calculates and displays superheat and subcooling in real time.
   
• All calculations are done for you, quickly and accurately.
   
• With our heatpump function the testo 550 will automatically switch high and low pressure readings as the unit cycles. No need to remove and reconnect hoses.

Charging

• The testo 550 includes a vacuum indicator to help you know when you’ve reached the limits evacuating the system.
   
• Large, clear sight glass allows you to monitor the flow of refrigerant.

Maintaining

• testo 550 lets you perform a system leak test. By measuring the system pressure and the ambient temperature over a limited time, you can determine the integrity of a system. This allows you to carry out additional work with confidence using the 550.

testo 550 RSA Deluxe Kit:
(Illustration may differ from original!)

• Refrigeration System Analyzer testo 550
• 2 Clamp probes 
• Hard carry case for 550, probes, hoses
• Certificate and batteries

Order no. 0563 5506

Air probe (NTC)

• Measuring range: -58 to +257°F

Order no. 0613 1712

Transport case
(Illustration may differ from original!)  

• Hard carry case for 550, probes, hoses

Order no. 0516 5505