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The Testo 550s Kit is a professional-grade digital manifold gauge set designed for HVAC and refrigeration experts. Featuring Bluetooth connectivity, dual wired temperature clamp probes, and a wide measurement range (-58° to 302°F, -15 to 870 psi), it delivers highly accurate temperature and pressure readings with ±0.5% pressure and ±0.5°C temperature precision. Compatible with most refrigerants including A3 types, it streamlines system diagnostics and optimization through the Testo Smart App, making it an indispensable tool for efficient, data-driven HVAC servicing.




| ASIN | B08TY6JH9M |
| Batteries | 4 AA batteries required. (included) |
| Best Sellers Rank | #228,777 in Automotive ( See Top 100 in Automotive ) #90 in Automotive AC Manifold Gauges |
| Brand | Testo |
| Customer Reviews | 4.6 4.6 out of 5 stars (495) |
| Date First Available | 25 January 2021 |
| Item Weight | 0.28 g |
| Item model number | 550s |
| Manufacturer | Testo |
| Manufacturer Part Number | 0564 5501 01 |
| Model | 550s Basic Kit |
| Product Dimensions | 21.08 x 12.19 x 6.1 cm; 0.28 g |
M**.
El producto está perfecto, es una lástima que el que me mandaron trae un fallo en la pantalla, deben de poner más verificaciones de calidad o mejor protección a los producto para que no sufran estos daños. =(, me han hecho la devolución y lo pedí de nuevo me a llegado uno nuevo sellado y sin problema, gracias Amazon 😍
R**P
The unit is smaller than I thought looking at the pic. Than does not take away from the gauges. They have worked great. I have no complaints. They hook up to the temp probes and vacuum gauge with out any problem. I have had them on many all day jobs on some large systems and the battery indicator still says full.
T**7
The Testo 550s AC Manifold Gauge Set is a reliable and essential tool for HVAC and refrigeration professionals. With its accurate readings, wired temperature probes, and comprehensive features, this gauge set ensures precise monitoring and analysis of AC systems for optimal performance. The standout feature of the Testo 550s AC Manifold Gauge Set is its accuracy. The gauges are engineered to provide precise measurements of pressure, temperature, and superheat/subcooling, allowing technicians to make informed decisions and diagnose issues effectively. The high-quality construction and advanced sensor technology ensure reliable and repeatable readings, ensuring confidence in the results. This gauge set includes two wired temperature probes, which are invaluable for obtaining accurate temperature measurements in various parts of the AC system. The probes can be easily attached to different components such as condenser units, evaporators, or refrigerant lines, providing valuable insights into the system's operation. With this information, technicians can assess system performance, identify potential issues, and optimize the overall efficiency of the AC or refrigeration system. The Testo 550s AC Manifold Gauge Set is designed with convenience and usability in mind. The gauges feature a user-friendly interface with a large backlit display for easy reading even in low-light conditions. The intuitive menu navigation allows technicians to quickly access the desired functions and make adjustments effortlessly. The rugged build and ergonomic design ensure durability and comfort during extended use. Additionally, this gauge set offers comprehensive features that cater to the specific needs of HVAC and refrigeration professionals. It supports multiple refrigerant types, including R-410A, R-22, R-404A, and more, ensuring versatility for a wide range of applications. The set also features automatic calculations of superheat and subcooling, enabling efficient troubleshooting and system optimization. Testo is known for its commitment to quality and innovation. The Testo 550s AC Manifold Gauge Set upholds this reputation by meeting the highest industry standards. It undergoes rigorous testing and calibration to deliver accurate and reliable performance, making it a trusted tool for professional technicians. In conclusion, the Testo 550s AC Manifold Gauge Set is an indispensable tool for HVAC and refrigeration professionals. With its accurate readings, wired temperature probes, and comprehensive features, this gauge set enables precise monitoring and analysis of AC systems. Enhance your diagnostic capabilities, optimize system performance, and deliver exceptional service with the reliable and efficient Testo 550s AC Manifold Gauge Set.
C**E
Excellent
D**E
Product as described
Trustpilot
3 days ago
1 month ago