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    testo 557 - this model has been discontinued

    0563 5572
    2. This model has been discontinued. We suggest these replacement products:

    This model has been discontinued.

    General technical data

    Weight
    1200 g
    Dimensions
    280 x 135 x 75 mm
    Operating temperature
    -20 to +50 °C
    Protection class
    IP42
    Battery life
    Approx. 150 h (without illumination)
    Pressure media
    CFC; HFC; N; H₂O; CO₂
    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 measurement range up to 50 bar); R1234yf; update by Testo Service
    Storage temperature
    -20 to +60 °C

    Temperature

    Measuring range
    -50 to +150 °C
    Accuracy
    ±0.5 °C (±1 Digit)
    Resolution
    0.1 °C
    Probe connection
    2 x Plug-in (NTC)

    Pressure measurement

    Measuring range
    50 bar
    Accuracy
    ±0.5 % fs (±1 Digit)
    Resolution
    0.0 bar / 0.1 psi
    Probe connection
    3 x 7/16" – UNF + 1 x 5/8'' – UNF
    Overload rel. (low pressure)
    52 bar
    Overload rel. (high pressure)
    52 bar
    Low pressure rel.
    50 bar
    High pressure rel.
    50 bar