Testo 557 Digital Refrigeration Manifold


testo approved distributor

The Testo 557 four valve manifold with a built in vacuum gauge is the next high performance, low cost Refrigeration System Analyser from Testo.

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0563 1571


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£ 407.55 rrp £ 429.00

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(£ 489.06 inc VAT.)

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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.

Refrigerants in instrument:

R12, R22, R123, R134a, R227, R290, R401A, R401B, R402A, R402B, R404A,R406A, R407A, R407C, R408A, R409A,R410A, R411A, R413A,R414B, R416A,R417A, R420A, R421A, R421B, R422A,R422B, R422D, R424A, R427A, R434A,R437A, R438A, R502, R503, R507,R600, R600a, R718 (H2O), R744 (only in the permitted range up to 50 bar), R1234yf.

  • Pressure: kPa / MPa / bar / psi.
  • Temperature: °C / °F / K.
  • Vacuum: hPa / mbar/ Torr / inH2O / Micron / inHg / P.
  • Built in Vacuum Gauge.
  • Robust valve block with 4 connections and built in sight glass.
  • 2 temperature probe inputs for simultaneous real-time calculation of superheat and subcooling.
  • Readings are displayed within seconds.
  • Compact design for ease of use, transport and setup.
  • Large easy to read back-lit display.
  • Robust housing that protects the analyser.
  • 40 Refrigerants stored eliminating the use of PT chart.
  • Operating temperature: -20°C to 50°C.
  • Storage temperature: -20°C to 60°C.
  • Display: LCD.
  • Life: > 150 h (wthout illumination).
  • Current source: Rechargeable batteries / batteries.
  • Dimensions: 280 x 135 x 75 mm.
  • Weight: approx. 1200g (without batteries).
  • Testo 557 Warranty: 2 years.


Includes: Testo 557-1 Digital Refrigeration Manifold, Batteries and Calibration Protocol.


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Testo 557 Digital Refrigeration Manifold