The Testo 557KIT (0563 2557) Digital 4-Valve Manifold Kit opens up new possibilities for efficient analysis and documentation thanks to the integration of Bluetooth connectivity with the testo Refrigeration App. You can clearly read measurement data, such as automatic calculations of superheat, subcool and vacuum readings, on a Smartphone or Tablet, allowing you to work more quickly and conveniently than ever before. In addition, measurement reports can be created and sent directly from the job site.

The 557 features an external 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 sub-cooling readings. Equipped with a 4 hose kit, the Testo 557 is the complete solution for any air conditioning job.

A sturdy housing reliably protects the Testo 557 digital manifold from impacts (according to protection class IP 42). Thanks to the suspension hook on the back, the instrument is well-secured during the measuring process. The illuminated display ensures optimum legibility of the readings, even if visibility is poor.