Testo 557 Specifications

Digital manifold

testo 557 – with remote vacuum
and Bluetooth

Measures high side / low side pressures and temperatures

psi/

bar

Super

heat

Sub-

cooling

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 update in the instrument via App

60 refrigerant profiles on board

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

5 year warranty with registration

The new testo 557 opens up new possibilities

for efficient analysis and documentation –
with Bluetooth / App integration. The wireless
connection allows users to read data on a
Smartphone or Tablet, quickly and conveniently.
Using the App, you can e-mail measurement
reports directly from the customer job site.
The App also allows you to update the stored
refrigerants.

°F/°C

micron

Leak

Test

The 557 now has a remote 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 sub­cooling readings.

www.testo.com

testo 557

Technical Data

testo 557

testo 557 kit, digital manifold with
Bluetooth, 2 x clamp probes, external
vacuum probe, batteries, case and
certificate of conformity

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“x4.0“x2.75“ (220 x 125 x 70 mm)

Weight 2.8 lb (1270 g)

Protection class IP42 (splash proof)

Refrigerants in the
instrument

Part no. 0563 1557

Warranty

Specifications

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“ 2 x plug-in (NTC probes)

Overload 940 psi (65 bar) –

Probes / Accessories

Clamp probe for pipes to 1.38“
diameter (35 mm), NTC, Fixed cable

4.9 ft. (1.5 m)

Range Accuracy Part No.

-40 to 257 °F

(-40 to 125 °C)

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 (H2O), update via App

2

2 years; 5 years with registration

Vacuum (indication)

0 to 20,000 Micron

±10% of rdg +10 microns (100 to 1.000 microns)

1 micron (from 0 to 1000 micron)

External vacuum probe (DIN connection)

–

±1.8 °F (-4 to 185 °F)
±1 °C (-20 to +85 °C)

0613 5505

Clamp probe for pipes to 1.38“
diameter (35 mm), NTC, Fixed cable

14.0‘ (5.0 m)

Pipe wrap probe with Velcro for pipe
diameter to max. 3“ (75 mm), NTC,
Fixed cable 4.9‘ (1.5 m)

Pipe clamp probe (NTC) for pipe
diameters 0.2“ to 2.5“ (5 to 65 mm),

11.80“
(300 mm)

1.18“
(30 mm)

-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)

°F (77 to 158 °F)

±0.4
±0.2 °C (-25 to +70 °C)

°F (-58 to -13 °F)

±0.8

±0.4 °C (-50 to -25.1 °C)

±0.4

°F (77 to 176 °F)

±0.2 °C (-25 ... +80 °C)

0613 5506

0613 4611

0613 5605

Fixed cable 5.6‘ (1.2 m)

External vacuum probe
(DIN connection)

Transport case for testo 549/550/557
and accessories

0 to 20,000

microns

±10% of rdg +10 microns

(100 to 1,000 microns)

0638 1557

0516 0012

Testo Inc. 800-227-0729 [e-mail] www.testo.com

Subject to change without notice.

e.o