Testo A\C Refrigeration
The NEW Testo 550 Series
The right measuring instrument for every application. The next generation of digital manifolds from Testo. With several options available, including wireless smart probes for temperature and vacuum, and a rugged case, these digital manifolds are immediately ready to use.
Whatever the digital manifolds are needed for – the new Testo 550 line has the right one. Compare and decide better.
Images link to best kit for the job
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Testo 550s | Testo 557s | Testo 550i |
|---|---|---|---|
| Valve Block | 2-Way | 4-Way | 2-Way |
| Large Graphic Display | ✓ | ✓ | (App Only - Smart Device Required) |
| Testo Smart App Compatible | Bluetooth 5.0 (range up to 500 feet) | Bluetooth 5.0 (range up to 500 feet) | Bluetooth 5.0 (range up to 500 feet) |
| Smart Probe Compatible | ✓ (with automatic connection) |
✓ (with automatic connection) |
✓ (with automatic connection) |
| Compact one-hand opperation | ✓ | ✓ | ✓ (ultra-compact) |
| Protection Class | IP54 | IP54 | IP54 |
| Identical Pressure Measuring Range HP/LP | up to 870 psi | up to 870 psi | up to 870 psi |
| Pressure Accuracy Measurement | > 0.5 % of fs | > 0.5 % of fs | > 0.5 % of fs |
| Integrated Temperature Measurement | ✓ (up to 2 temperature probes + Bluetooth probe) |
✓ (up to 2 temperature probes + Bluetooth probe) |
✓ (up to 2 temperature probes + Bluetooth probe) |
| Target Superheat on Manifold or App | ✓ (Both) |
✓ (Both) |
✓ (App Only) |
| Data documented and sent via App | ✓ | ✓ | ✓ |
| Refrigerants Stored | 90 | 90 | 90 |
| Refrigerant Update automatically via App | ✓ | ✓ | ✓ |
| Suitable for A2L Refrigerants | ✓ | ✓ | ✓ |
| Testo PC Software (Optional) | ✓ | ✓ | ✓ |
Measurements Matter!
Why choose a Testo Digital Gauge? Because the measurement is never compromised!
When it comes to accurately charging, commissioning and testing A/C and Refrigeration systems the Testo Digital Gauges are considered the most accurate instruments on the market. All measurements are not created equal! Utilizing a lower range pressure transducer means that Testo Digital Gauges are more accurate in the designed working range. Because the sensors are ceramic, they can handle over pressurization at almost twice the working pressure. Special designed temperature clamps that use NTC thermistors also mean higher accuracy, repeatability, and a lower over measurement uncertainty than other digital gauges. The Testo Digital Gauges come fully calibrated out of the box unlike manifolds using K-type thermocouples and recalibration is not required when the probes are replaced or even switched in the meter sockets. Because the Testo Digital Gauges are temperature compensated, atmospheric compensated and protected from EMF, you can be assured of accurate quick measurements that are right the first time every time.
