Bluetooth enables wireless, fast, easy, and precise vacuum measurement through a single service connection – all without refrigerant loss. The testo Smart App supports this with numerous intelligent features. You can instantly recognize the vacuum at a glance through the graphical representation in the app or on the display of the service tool. Thanks to the robust, handy housing and proven measurement technology, the vacuum probe is compact and reliable for vacuum measurement in refrigeration and air conditioning systems as well as heat pumps.