The Testo 550 instantly displays superheat and sub-cooling for up to 60 refrigerants. It also measures high / low side pressures and temperatures.
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The testo 550 instantly displays superheat and sub-cooling for up to 60 refrigerants. It also measures high / low side pressures and temperatures. With its free Bluetooth linked App, the testo 550 opens up new possibilities for efficient analysis and documentation. NO SIGHT GLASS
The rugged housing of the Testo 550 digital manifold includes a metal frame around the display which protects the digital manifold from impact. Now with 60 refrigerant profiles and added functionality for leak tests, the Testo 550 digital manifold is versatile enough to become the tool for every job. You can view measurement data on your Smartphone or Tablet, enabling you to quickly and conveniently complete and document your job. Then, be able to finalize the documentation and send the report and invoice via email, right from the job site. The App can also be used to download new refrigerants from the Internet directly into the manifold.
Testo 550 kit, digital manifold with Bluetooth / App; including 2 x clamp probes, batteries, case, certificate of conformity, and user's manual.
-58° to 302 °F / -50 to +150 °C
±0.9 °F / ±0.5 °C
0.1 °F / 0.1 °C
2 x plug-in (NTC)
-14 to 870 psi / -1 to 60 bar
±0.5 % Fs
0.10 psi / 0.01 bar
3 x 7/16" – UNF
Overload rel. (high pressure)
943 psi / 65 bar
-14 to 0 psi (indication) / -1 to 0 bar
approx. 250h (display light off, Bluetooth off)
Refrigerants in instrument
R408A; R152A; R161; R1234yf; R502; R14; R407D; R123; R600a; R438A; R401A; R422A; R421A; R412A; R744 (CO₂); R23; R413A; R125; Ra11A; R407A; R407C; R600; R402A; R227; R422C; R427A; R406A; R422B; R424A; R13B1; R414B; R404A; R409A; R507; R422D; R401C; R12; R32; R11; R421B; R508A; R410A; R420A; 60 profiles:; R503; R417A; R22; R718 (H₂O); R125; R290; R508B; R407F; R416A; R134a; R437A; R1234ze; update via App; R426A; R402B; R407B; R401B; R142B; R434A
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