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Testo 557 Digital Refrigeration Gauges with Vacuum & Bluetooth

Availability: Out of stock

The Testo 557 is an easy to-use, high quality four valve digital HVAC manifold. Featuring a built-in vacuum measurement, the 557 has the ability to notify the user when limits have been reached upon evacuating a system. in addition, the Testo 557 is supplied with two NTC temperature probe inputs, allowing superheat and subcooling to be measured at the same time,...

Availability: Out of stock


The Testo 557 is an easy to-use, high quality four valve digital HVAC manifold. A new feature of the Testo 557 is an external probe, capable of performing highly precise vacuum measurements. The Testo 557 is also capable of performing superheat and subcooling measurements at the same time with the two supplied NTC temperature inputs.

Another added feature is the app integration via Bluetooth connectivity. This provides the user the ability to read off measurement data on smartphone or tablet as well as finalizing and sending measurement reports on site. The Testo 557 also comes pre-loaded with 60 refrigerant profiles, which can be updated using the Bluetooth application, and features an easy to read, backlit display.

The Testo 557 is ideal for servicing, maintaining and commissioning all types of air conditioning systems and is supplied in a robust housing with 2 clamp probes, an external vacuum probe, batteries, case and calibration certificate.


Four ports, including oversize charging and evacuation port

Vacuum measurements using external probe

Bluetooth for connection to smartphones with app allowing measurement reports to be sent from site

60 refrigerant profiles

Superheat and subcooling measurement simultaneously

Works with R32 and new generation refrigerants

Up to 3 years warranty (on product registration)

Supplied complete and ready to use in hard case

Download Attachment
pdfTesto 557 Datasheet (382.53 KB )

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Test Equipment

Test Equipment has always been proud of being one of the most progressive specialist suppliers of test and measurement equipment. Australian owned and operated by experienced engineers, we offer extensive product and application knowledge as well as quality service, which translates into a seamless experience when you procure your test and measurement instruments from us.

We started as a small business, fueled by the knowledge that we could make a positive impact and have come a long way since our inception, growing a small range of products into a full range of hundreds of products from some of the most respected brands in the industry such as AEMC, FLIR Systems, Kyoritsu, Megger and Testrix Systems. We now cater for a massive number of clientele from all types of industries including electrical contractors, utility companies, engineering businesses and large corporations as well as a large number of local, and state government departments. We now serve the whole of Australia with various instrumentation including cable & pipe locators, drain, sewer & pipe inspection cameras, ground penetrating radar, thermal imaging equipment, power quality equipment and a whole range of industrial test instruments such as low resistance testers, insulation resistance testers and ground resistance testers.

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