Efficient: The testo 552 monitors the evacuation of hvac and heat pump systems dynamically. Thanks to optimized Pirani sensors, deep vacuum measurements are easier than ever | Versatile: The pressure measurement tool is equipped with countless features in order to provide precise, comprehensive vacuum measurements down to single digit resolutions | Time-saving: Thanks to groundbreaking real-time calculations, the testo 552 determines micron/temperature levels and provides notifications when the evacuation target is met | Smart: The device communicates with smartphones or tablets via Bluetooth connection, thus providing reliable, precise analyses and reports which can be forwarded via e-mail | App for Android and iOS: The free testo Smart Probes App is a powerful tool that allows you to read and log measurements and create custom reports which can be saved and shared

testo 552 - Precise vacuum measurements down to 1 micron resolutionThe testo 552 is an easy-to-use, efficient and reliable tool that makes it easier than ever to monitor the evacuation of air conditioning, refrigeratoin and heat pump systems. It supports Bluetooth and can be linked to your smart device with the free testo Smart Probes App.Technical data:Measuring range: 0 to 0.39 psi; 0 to 26.66 mbar; 0 to 20000 micronAccuracy: (10 micron + 10 % of mv) (100 to 1000 micron)Storage temperature: -4.0 to 122.0 F / -20 to +50 COperating temperature: 14.0 to 122.0 F / -10 to +50 CProtection class: IP42Resolution:1 micron (0 to 1000 micron) ; 10 micron (1000 to 2000 micron) ;100 micron (2000 to 5000 micron)Battery life: 50 hrs (without Bluetooth/backlighting)Battery type: 2 x AAConnection: 2 x 7/16 UNFParameter: mbar; micron; mmHg; Torr; inHg; inH20; hPa; PaMeasuring range: 0.5 secWeight: 18 oz. / 500 gDimensions: 6 x 4 x 2 in. / 160 x 110 x 50 mmSystem requirements: requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0Delivery Scope: 1 x testo 552 digital vacuum gauge with Bluetooth