testo 557

Data sheet

Measures high side / low side pressures and temperatures

Simultaneous, real-time super heat and sub-cooling

External vacuum probe for faster and more reliable

evacuation of the system

App integration via Bluetooth for fast and convenient

remote monitoring and reporting via email

Refrigerant updates to the instrument via App

60 on board refrigerant profiles

4-way valve block with 1/4 in. and 3/8 in. ports

3 year warranty with registration

testo 557 – with external vacuum

and Bluetooth

The testo 557 Digital Manifold opens up new possibilities

for efficient analysis and documentation thanks to the

integration of Bluetooth connectivity with the testo

Refrigeration App. You can clearly read measurement

data, such as automatic calculations of superheat, sub-

cool and vacuum readings, on a Smartphone or Tablet,

allowing you to work more quickly and conveniently than

ever before. In addition, measurement reports can be

created and sent directly from the job site.

The 557 features an external vacuum probe for faster

and more reliable evacuations and is suitable for all

refrigeration systems or heat pumps. This compact

manifold has a 4-way valve block, large backlit display

and sight glass. Two NTC thermistor clamp probes

provide superior accuracy of simultaneous, real-time

superheat and sub-cooling readings. With an optional 4

hose kit, the testo 557 is the complete solution for any

air conditioning job you can throw at it.

micron

Digital manifold

bar

Leak

Test

Super

heat

Sub-

cooling

psi/

°F/°C

available on:

available on: available on:

testo 557 with hoses

testo 557 kit, digital manifold with

Bluetooth, set of (4) 60 inch refrigeration

hoses, 2 x clamp probes, external vacuum

probe, batteries, case and certificate of

conformity

Part no. 0563 2557

testo 557 Digital Manifold

Technical Data

testo 557

testo 557 kit, digital manifold with

Bluetooth, 2 x clamp probes, external

vacuum probe, batteries, case and

certificate of conformity

Part no. 0563 1557

Operating temperature -4° to 122° F (-20 to +50 °C)

Storage temperature -4° to 140° F (-20 to +60 °C)

Battery life

(4 x AA Alkaline)

250 h (less with use of Bluetooth, backlight and vacuum)

Dimensions 8.7” x 4.0” x 2.75” (220 x 101 x 70 mm)

Weight 2.8 lb (1270 g)

Protection class IP42 (splash proof)

Warranty

2 years; 3 years with registration

Refrigerants in the

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, R411A, 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 (CO

), R718 (H

O), update via App

0516 0012

Transport case for testo 549/550/557

and accessories

Probes / Accessories

Clamp probe for pipes to 1.38”

diameter (35 mm), NTC, Fixed cable

4.9 ft. (1.5 m)

Clamp probe for pipes to 1.38”

diameter (35 mm), NTC, Fixed cable

16.0 ft. (5.0 m)

Pipe wrap probe with Velcro for pipe

diameter to max. 3” (75 mm), NTC,

Fixed cable 4.9 ft. (1.5 m)

Pipe clamp probe (NTC) for pipe

diameters 0.2” to 2.5” (5 to 65 mm),

Fixed cable 9 ft. (2.7 m)

-40 to 257 °F

(-40 to 125 °C)

-40 to 257 °F

(-40 to 125 °C)

-58 to 158 °F

(-50 to +70 °C)

-58 to 248 °F

(-50 ... +120 °C)

±1.8 °F (-4 to 185 °F)

±1 °C (-20 to +85 °C)

±1.8 °F (-4 to 185 °F)

±1 °C (-20 to +85 °C)

±0.4 °F (77 to 158 °F)

±0.2 °C (-25 to +70 °C)

±0.8 °F (-58 to -13 °F)

±0.4 °C (-50 to -25.1 °C)

±0.4 °F (77 to 176 °F)

±0.2 °C (-25 ... +80 °C)

0613 5505

0613 5506

0613 4611

0613 5605

11.80”

(300 mm)

1.18”

(30 mm)

Range Accuracy Part No.

07.2018

Subject to change without notice.

External vacuum probe

(DIN connection)

0638 1557

±10% of rdg +10 microns

(100 to 1,000 microns)

0 to 20,000

microns

Two-valve field replacement kit

0554 5570

Pressure Temperature

Measuring range -14.7 to 870 psi (-1 to 60 bar) -58 to 302 °F (-50 to +150 °C)

Accuracy (at 70 °F) ±0.5 % fs ±0.9 °F (±0.5 °C)

Resolution 0.1 psi (0.01 bar) 0.1 °F (0.1 °C)

Connections 1/4”, 3/8” 2 x plug-in (NTC probes)

Overload 940 psi (65 bar) –

Vacuum

0 to 20,000 Micron

External vacuum probe (DIN connection)

1 micron (from 0 to 1000 micron)

–

Speciﬁcations

±10% of rdg +10 microns (100 to 1000 microns)