{"product_id":"testo-552-digital-vacuum-gauge-bluetooth-0560-5522","title":"Testo 552 Digital Vacuum Gauge with Bluetooth","description":"\u003cdiv style=\"text-align: left;\"\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eThe Testo 552 digital vacuum gauge with Bluetooth is a solid bit of kit for any tech doing evacuation work on AC\/R and heat pump systems. It helps ensure you pull a deep, dry vacuum, which is critical for system longevity and performance, especially here in Australia's humid conditions.\u003c\/p\u003e\n\u003c!-- CHANGED: First-person \"I've seen too many compressors…\" rephrased to brand\/trade voice --\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eInadequate evacuation is one of the leading causes of early compressor failure in the field — having a reliable micron gauge like the Testo 552 on the truck helps techs do the job properly and avoid costly callbacks. It's built tough for the trade and lets you monitor progress right from your smartphone.\u003c\/p\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eBest For\u003c\/h2\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003eHVAC\/R technicians\u003c\/li\u003e\n\u003cli\u003eRefrigeration apprentices\u003c\/li\u003e\n\u003cli\u003eService and maintenance teams\u003c\/li\u003e\n\u003cli\u003eSystem commissioning and installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eCompatibility\u003c\/h2\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eThe Testo 552 is designed for evacuating standard air conditioning, refrigeration, and heat pump systems. It connects via two 7\/16\" UNF fittings, which are common for many vacuum pump and manifold setups. For app control and data logging, it requires a mobile device with iOS 11.0 or newer, or Android 6.0 or newer, and Bluetooth 4.0.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eIf you're running a different model or have unique fittings, check compatibility and specs before ordering.\u003c\/p\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eFeatures\u003c\/h2\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth Connectivity:\u003c\/strong\u003e Control and read complete measurements directly via your smartphone using the free Testo Smart app.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Precision Pirani Sensor:\u003c\/strong\u003e Delivers accurate deep vacuum measurements with a resolution down to 1 micron (in the 0 to 1000 micron range).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSaturation Temperature Calculation:\u003c\/strong\u003e Provides real-time calculations to determine proper micron\/temperature levels for effective moisture removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUser-Defined Alarm Points:\u003c\/strong\u003e Set custom alarm thresholds to alert you when your target evacuation values are reached.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust \u0026amp; Reliable:\u003c\/strong\u003e Features an IP42 protection class and a sensor that resists contamination, ensuring consistent accuracy without frequent cleaning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn-Site Reporting:\u003c\/strong\u003e The Testo Smart app allows for easy creation and emailing of measurement protocols and reports.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 16px; margin-bottom: 20px;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"color: #007acc; border: 1px solid #e0e0e0; padding: 10px; text-align: left; background-color: #f5f5f5;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"color: #007acc; border: 1px solid #e0e0e0; padding: 10px; text-align: left; background-color: #f5f5f5;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eMeasuring Range\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e0 to 20000 micron (0 to 0.39 psi \/ 0 to 26.66 mbar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eAccuracy (100 to 1000 micron)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e±(10 micron + 10 % of mv)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eResolution (0 to 1000 micron)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e1 micron\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eResolution (1000 to 2000 micron)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e10 micron\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eResolution (2000 to 5000 micron)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e100 micron\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eOverload (Absolute)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e6.0 bar (87.0 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eOverload (Relative)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e5.0 bar (72.5 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e500 g (18 oz.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e160 x 110 x 50 mm (6 x 4 x 2 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e-10 to +50 °C (14.0° to 122.0 °F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eProtection Class\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eIP42\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eBattery Type\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e2 x AA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eBattery Life\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e50 hrs (without Bluetooth\/backlighting)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eConnection\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e2 x 7\/16\" UNF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eInterface\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eBluetooth® 4.0 wireless technology\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eMeasuring Rate\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e0.5 sec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eSupported Units\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003embar, micron, mmHg, Torr, inHg, inH20, hPa, Pa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003eTesto 552 Digital Vacuum Gauge with Bluetooth\u003c\/li\u003e\n\u003cli\u003e2 x AA batteries\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eUsing It on the Job\u003c\/h2\u003e\n\u003col style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolate the System:\u003c\/strong\u003e Always ensure the refrigeration or AC system is depressurised and safely isolated before connecting any vacuum gauge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnect the Gauge:\u003c\/strong\u003e Attach the Testo 552 to your system's service port (or manifold) using appropriate vacuum-rated hoses and adaptors. Double-check connections for tightness to prevent leaks and false readings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEvacuate:\u003c\/strong\u003e Start your vacuum pump and monitor the evacuation process on the gauge's backlit display or via the Testo Smart app. Aim for deep vacuum levels specific to the refrigerant and manufacturer specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMonitor Moisture Removal:\u003c\/strong\u003e Utilise the saturation temperature calculation feature to confirm moisture is being removed from the system. Set alarm thresholds to alert you when your target micron level is reached and held.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerify Vacuum Hold:\u003c\/strong\u003e Once the target vacuum is achieved, shut off your vacuum pump and isolate the system from the pump. Monitor the vacuum gauge for any rise in pressure over time, which indicates a leak.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisconnect:\u003c\/strong\u003e When evacuation is complete and verified, safely disconnect the gauge and cap off all service ports securely.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eLimitations \u0026amp; Safety Notes\u003c\/h2\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003eAny work on refrigerant circuits requires a current ARCtick licence in Australia.\u003c\/li\u003e\n\u003cli\u003eAlways ensure system pressure is safely vented or recovered before connecting a vacuum gauge.\u003c\/li\u003e\n\u003cli\u003eOnly use on systems compatible with the 7\/16\" UNF connections provided.\u003c\/li\u003e\n\u003cli\u003eProtect the gauge from extreme impacts and direct water exposure, despite its IP42 rating, to ensure longevity.\u003c\/li\u003e\n\u003cli\u003eAlways refer to the system manufacturer's specifications for target evacuation pressures and hold times.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eTradie Pro Tip\u003c\/h2\u003e\n\u003cblockquote style=\"border-left: 4px solid #007acc; background-color: #f9f9f9; font-style: italic; padding: 15px; margin: 20px 0;\"\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eWhen you're pulling a vacuum, especially on a larger system or after a compressor burnout, always change your vacuum pump oil. Contaminated oil won't let you pull a deep enough vacuum, and it's a quick job that makes a massive difference to your evacuation depth and time.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003ePair With\u003c\/h2\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003ePair with a robust vacuum pump, high-quality manifold gauges, and a good set of vacuum-rated hoses for a complete evacuation setup. Consider the optional MiniDIN connection cable for integration with a Testo 570 manifold for enhanced data logging capabilities.\u003c\/p\u003e\n\u003c!-- CHANGED: Author\/reviewer block added, consistent with Testo 549 and other product pages --\u003e\n\u003cdiv style=\"margin-top: 40px; padding-top: 20px; border-top: 1px solid #eee; font-size: 0.95rem; color: #444;\" class=\"trust-block\"\u003e\n\u003cp\u003e\u003cstrong\u003eAuthor:\u003c\/strong\u003e HVACShop Content Team\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReviewer:\u003c\/strong\u003e Licensed refrigeration \u0026amp; air-conditioning technician (role-based reviewer)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e The flagged testo.com product page link (\u003ccode\u003etesto.com\/en-AU\/testo-552\/p\/0560-5522\u003c\/code\u003e) was not found in this article's HTML — please check whether it appears in another section of the live product page (e.g. specs tab or footer) and remove it there if so.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Automated FAQ Schema --\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Testo","offers":[{"title":"Default Title","offer_id":43550741528635,"sku":"0560 5522","price":653.53,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0316\/7787\/4235\/files\/testo-552-mit-icon.jpg?v=1779863478","url":"https:\/\/www.hvacshop.com.au\/products\/testo-552-digital-vacuum-gauge-bluetooth-0560-5522","provider":"HVAC Supply Shop","version":"1.0","type":"link"}