TESTO เกจวัดน้ำยาแอร์แบบดิจิตอล รุ่น 557-Set (Bluetooth)


TESTO เกจวัดน้ำยาแอร์แบบดิจิตอล รุ่น 557-Set (Bluetooth)

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Product Manual : คู่มือการใช้งาน 557-Set

Additional information



Temperature range

-50°C to 150°C

Pressure range

-1 to 60 bar



Pressure accuracy

±0.5% fs



Pressure resolution

0.01 bar


2 x Plug-in (NTC)

Probe connection

3 x 7/16" – UNF + 1 x 5/8'' – UNF

Vacuum range

0 to 20000 micron

Overload rel.

65 bar (high pressure)

Operating temperature

-20°C to +50°C

Storage temperature

-20°C to 60°C

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