Testo 557 Digital Refrigeration Gauge with Vacuum probe - 05631557



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Testo 557 Digital Refrigeration Gauge with Vacuum probe

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If your after an absolute bargain for your next set of digital gauges look no further.

The Testo 557 digital refrigeration gauge 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. An external vacuum probe provides fast and more reliable evacuation of the system.

If you add up the cost of buying all those instruments individually you can see why it makes sense to own this amazing piece of kit.

The gauges allow you to connect via Wireless Bluetooth to a Testo App which allows you to view measurement data on your Smartphone or Tablet, which enables you to quickly complete and save all data correspsonding to your job. You can then send the service reports and invoice via email, right from the job site to your customer.

In addition to the 60 refrigerant profiles stored in the instrument, the App can also be used to download new refrigerants from the Internet directly into the digital manifold.


  • 60 Built in refrigerants
  • External vacuum probe for faster and more reliable evacuation of the system
  • 4-way valve block with 1/4 in. and 3/8 in. ports
  • On-site Reporting/ Monitoring Via Testo Refrigeration App
  • 60 built in refrigerants
  • Measures high side / low side pressures and temperatures
  • 4-way valve block with 1/4 in. and 3/8 in. ports
  • External vacuum probe
  • App integration via Bluetooth (65 feet range)


  • Testo 557 kit digital manifold with Bluetooth / App
  • 2 x NTC temperature clamp probes
  • External vacuum probe
  • Batteries
  • Protective Case
  • Certificate of conformity and user's manual.


Storage Temperature - -20 to + 60°C

Battery Type - 4 AA Batteries

Battery Life - 250 Hours

Dimensions - 265 x 48 x 19 mm

Resolution - 0.1 °C /°F / °R

Vacuum Measurement - 0 - 10,000 Microns of Mercury

Low Pressure Probe Measurement - -1 to 60 Bar


Buy with 100% confidence knowing your purchase is backed by the full Manufacturers Warranty.



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