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Testo 557 Digital Refrigeration Manifold
  • Testo 557 Digital Refrigeration Manifold
  • Testo 557 Digital Refrigeration Manifold
  • Testo 557 Digital Refrigeration Manifold
  • Testo 557 Digital Refrigeration Manifold

Testo 557 Digital Refrigeration Manifold

testo approved distributor

Includes: Testo 557 digital 4-way manifold, including set of 4 hoses, batteries (4 x AA) and calibration protocol, 2 x clamp temperature probes (0613 5506), Precise external Pirani gauge for vacuum measurement, Transport case (0516 0012) & App (free download).

0563 1557
£418.00 Save 5%
Tax excluded
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The built in vacuum gauge allows the technician to know when they have reached the limits when evacuating a system. Building upon the easy to use platform designed by testo, the Testo 557 has 2 NTC temperature probe inputs and can simultaneously calculate superheat and subcooling in real time.

The Testo 557 is ideal for servicing, maintaining and commissioning all types of air conditioning systems. The 557 will also perform leak tests on AC/R systems with temperature compensation, insuring accurate results.


Extensive accessories included: set of 4 hoses, 2 x clamp temperature probes, precise external Pirani gauge for vacuum measurement and transport case.
Calculation of superheating and subcooling in real time for 60 refrigerants: no error-prone manual calculation.
4-way valve block for fast and efficient work.
Connection to smartphone/tablet App: remote monitoring, clever measurement documentation and refrigerant updates.
Temperature-compensated leakage test, automatic ambient pressure measurement.
250 hours‘ battery life.

Testo 557 Product Video

Testo 557 Specifications
Pressure Measurement
Measuring range -1 to 60 bar.
Accuracy ±0.5 % fs.
Resolution 0.01 bar.
Probe connection 3 x 7/16" – UNF + 1 x 5/8'' – UNF.
Overload rel. (high pressure) 65 bar.
Measuring range -50 to +150 °C.
Accuracy ±0.5 °C.
Resolution 0.1 °C.
Probe connection 2 x Plug-in (NTC).
Vacuum Measurement
Measuring range 0 to 20000 micron.
Accuracy ± (10 micron + 10 % of mv) (100 to 1000 micron).
Resolution 1 micron (0 to 1000 micron)
10 micron (1000 to 2000 micron)
100 micron (2000 to 5000 micron)
500 micron (5000 to 10000 micron)
5000 micron (10000 to 20000 micron).
General Technical Data
Dimensions 220 x 125 x 70 mm.
Operating temperature -20 to +50 °C.
Protection class IP42.
Battery life 250 h (without illumination, without Bluetooth®, without vacuum probe).
Pressure media CFC.
Refrigerants in instrument 60 profiles:; R11; R12; R123; R1234yf; R1234ze; R125; R13B1; R134a; R14; R142B; R152A; R161; R22; R227; R23; R290; R32; R401A; R401B; R401C; R402A; R402B; R404A; R406A; R407A; R407B; R407C; R407D; R407F; R408A; R409A; R410A; Ra11A; R412A; R413A; R414B; R416A; R417A; R420A; R421A; R421B; R422A; R422B; R422C; R422D; R424A; R426A; R427A; R434A; R437A; R438A; R502; R503; R507; R508A; R508B; R600; R600a; R744 (CO2); R718 (H2O); update via App.
System requirements requires iOS 7.1 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0.
Storage temperature -20 to +60 °C.
Weight 1200 g.


Testo 557 Datasheet

PDF Specifications of the Testo 557 Digital Manifold Kit.

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Testo 557 Digital Refrigeration Manifold
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