This compact, rugged, easy-to-use wireless high-pressure refrigeration probe measures high- or low-side refrigeration pressure in HVAC-R systems – ideal for the HVAC professional. The hoseless probe provides clean, simple, and accurate measurements.

Easily monitor and transmit all measured data wirelessly via Bluetooth® to your smartphone or tablet from up to 60 feet away. With the free Testo Smart Probes app, you can display measurements from up to six Smart Probes at the same time, visualize measurement value changes as a graph or a table, and perform automatic calculations. Easily turn your data into a custom report, attach images created with the app, and send via email as a PDF or Excel® file.

To monitor superheating and subcooling in AC and refrigeration systems use two 549i probes in conjunction with two 115i Smart Probe clamp thermometers.

Available for sale in the United States and Canada only.