The Testo 552 Digital Vacuum Gauge with Bluetooth is a high-precision vacuum gauge designed for professional HVAC-R evacuation work. Built for air conditioning, refrigeration and heat pump systems, it measures deep vacuum accurately so technicians can confirm system evacuation and moisture removal before charging.
Using a precise Pirani sensor, the testo 552 measures vacuum down to single micron resolution and displays the evaporation temperature of water, helping technicians assess dehumidification during evacuation. Bluetooth connectivity allows readings to be monitored and documented through the Testo Smart App, making it easier to create service reports and track evacuation performance from a smartphone or tablet.
Key Features
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Digital vacuum / micron gauge for HVAC-R evacuation
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Designed for air conditioning, refrigeration and heat pump systems
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High-precision Pirani sensor for reliable deep vacuum measurement
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Measures from 0 to 20,000 microns
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1 micron resolution for accurate evacuation monitoring
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Displays H₂O evaporation / saturation temperature
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Bluetooth connection to the Testo Smart App
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Remote monitoring, documentation and report sharing via app
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Optical alarm when a set limit value is exceeded
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Backlit display for clear reading on site
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Robust housing with IP42 protection
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Compact field-ready design for service technicians
Specifications
| Item | Specification |
|---|
| Brand | Testo |
| Model | testo 552 |
| Product Number | 0560 5522 |
| Product Type | Digital Vacuum Gauge / Micron Gauge with Bluetooth |
| Sensor Type | Pirani vacuum sensor |
| Measuring Range | 0 to 20,000 microns / 0 to 26.66 mbar |
| Resolution | 1 micron |
| Pressure Units | micron, mbar, Torr, mmHg, hPa, Pa, inH₂O, inHg |
| Overload | 6 bar absolute / 5 bar relative |
| App Connectivity | Bluetooth / Testo Smart App |
| Display | Backlit digital display |
| Alarm | Optical alarm for limit value exceedance |
| Protection Rating | IP42 |
| Battery Life | Up to 50 hours without Bluetooth/backlight |
| Application | HVAC-R evacuation and deep vacuum monitoring |
Applications
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Air conditioning system evacuation
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Refrigeration system evacuation
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Heat pump commissioning
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Deep vacuum measurement
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Moisture removal verification
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Vacuum hold / decay monitoring
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Compressor replacement work
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New installations and major repairs
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Professional HVAC-R service documentation
The Testo 552 gives HVAC-R technicians a reliable way to monitor evacuation, verify deep vacuum and document results. With Bluetooth app connectivity, Pirani sensor accuracy and rugged field construction, it is a strong vacuum gauge for professional refrigeration and air conditioning service work.
