testo 557 - 4-Valve digital manifold kit with Bluetooth and external vacuum gauge

Order-Nr.  0563 1557

  • External vacuum probe for faster and more reliable system evacuation

  • Accurate, simultaneous superheat / subcooling measurements

  • Rugged housing with additional one year warranty (w/ registration)

  • Live data feed integration now available with the MeasureQuick App.

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Product Description

The testo 557 digital manifold has a 4-way valve block, a large backlit display, and a sight glass. Two NTC thermistor clamp probes provide superior accuracy for simultaneous, real-time superheat and subcooling readings.  The wireless Bluetooth / app allows you to view measurement data on your smartphone or tablet, enabling you to quickly and conveniently complete and document your job. Then, be able to finalize documentation and send reports and invoice via email, right from the job site. In addition to the 60 refrigerant profiles stored in the instrument, the app can be used to download new refrigerants from the Internet, directly to the digital manifold.
  • Measures high side / low side pressures and temperatures
  • 4-way valve block with 3/8 in. and 1/4 in. ports
  • External vacuum probe
  • App integration via Bluetooth (65-foot range)
  • Calculates and displays superheat and subcooling temperatures

Delivery Scope

testo 557 digital manifold, including 2x NTC temperature clamp probes, external vacuum probe, batteries, case, certificate of conformity, and user's manual

Technical Data


Measuring range

-58° to 302 °F / -50 to +150 °C


±0.9 °F / ±0.5 °C


0.1 °F / 0.1 °C

Probe connection

2 x Plug-in (NTC)

Pressure measurement

Measuring range

-15 to 870 psi / -1 to 60 bar


±0.5 % Fs


0.14 psi / 0.01 bar

Probe connection

3 x 7/16" – UNF + 1 x 5/8'' – UNF

Overload rel. (high pressure)

943 psi / 65 bar


Measuring range

0 to 20000 micron (measurement)


± (10 micron + 10 % of mv) (100 to 1000 micron)


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


115 oz. / 3250 g


9 x 5 x 3 in. / 220 x 125 x 70 mm

Operating temperature

-4° to 122 °F / -20 to +50 °C

Protection class


System requirements

requires iOS 13.0 or newer; requires Android 8.0 or newer; requires mobile end device with Bluetooth 4.0

Product colour


Battery life

250 h (without illumination, without Bluetooth®, without vacuum probe)

Pressure media


Refrigerants in instrument

R114; R12; R123; R1233zd; R1234yf; R1234ze; R124; R125; R13; R134a; R22; R23; R290; R32; R401A; R401B; R402A; R402B; R404A; R407A; R407C; R407F; R407H; R408A; R409A; R410A; R414B; R416A; R420A; R421A; R421B; R422B; R422C; R422D; R424A; R427A; R434A; R437A; R438A; R442A; R444B; R448A; R449A; R450A; R452A; R452B; R453a; R454A; R454B; R454C; R455A; R458A; R500; R502; R503; R507; R513A; R600a; R718 (H₂O); R744 (CO₂)

Refrigerants update via App

R11; FX80; I12A; R1150; R1270; R13B1; R14; R142B; R152A; R161; R170; R227; R236fa; R245fa; R401C; R406A; R407B; R407D; R41; Ra11A; R412A; R413A; R417A; R417B; R417C; R422A; R426A; R508A; R508B; R600; RIS89; SP22

Storage temperature

-4° to 140 °F / -20 to +60 °C



External vacuum probe

Order Number: 0638 1557

$ 162.00
excl. tax


 Efficient, robust NTC air probe 

Order Number: 0613 1712

$ 72.00
excl. tax



Transport case for extensive accessories

Order Number: 0516 0012

$ 151.00
excl. tax
$ 46.00
excl. tax