Testo 552i Wireless Vacuum Gauge (Micron Probe) – 0564 2552

The Testo 552i is a Bluetooth vacuum gauge for measuring deep vacuum during evacuation of refrigeration, air conditioning and heat pump systems. Its angled 7/16″ UNF connection fits directly onto a single service port, and the Testo Smart App lets you monitor the vacuum level and see how it changes over time.

Use it as a standalone gauge with the Smart App, connect it to a compatible Testo digital manifold, or pair it with the Testo 565i vacuum pump for automated evacuation with an integrated hold test.

Specifications

• Measuring range: 0–20,000 microns (0–26.66 mbar)

• Resolution: 1 micron from 0–1,000 microns

• Accuracy: ±(10 microns + 10% of reading) from 100–1,000 microns

• Connection: 7/16″ UNF with a 45° angled fitting

• Wireless connection: Bluetooth 4.2

• Protection rating: IP54

• Power: 3 × AAA batteries, included

• Instrument weight: 142 g