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The Testo 550s AC Manifold Gauge Set is a professional-grade HVAC diagnostic tool offering precise temperature (-58° to 302°F) and pressure (-15 to 870 psi) measurements with ±0.5% accuracy. Featuring Bluetooth connectivity, it integrates seamlessly with the Testo Smart App for remote monitoring, automatic superheat/subcooling calculations, and streamlined reporting. Equipped with two wireless temperature clamp probes and a vacuum probe, it supports a wide range of refrigerants including A2L types, making it an essential, rugged, and versatile tool for HVAC professionals aiming to optimize system performance and compliance.




| ASIN | B08TY6JH9M |
| Best Sellers Rank | #39,975 in Automotive ( See Top 100 in Automotive ) #7 in Air Conditioning Manifolds #126 in Air Conditioning Line Repair Tools |
| Brand | Testo |
| Brand Name | Testo |
| Customer Reviews | 4.6 out of 5 stars 550 Reviews |
| Included Components | Instrument, Temp Probes (2x), Manual, Batteries, Case |
| Item Dimensions | 8.3 x 4.8 x 2.4 inches |
| Item Weight | 0.27 g |
| Item dimensions L x W x H | 8.3 x 4.8 x 2.4 inches |
| Manufacturer | Testo SE & Co. KGaA |
| Material | Housing Material: ABS/PA/TPE |
| Material Type | Housing Material: ABS/PA/TPE |
| Model | 550s |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | 0564 5501 01 |
| Unit Count | 1 Count |
| Warranty Description | 2 year manufacturer |
T**7
Testo 550s AC Manifold Gauge Set for Professional Technicians
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.
B**.
Excellent product for HVAC
This is a well made product. I have used it on several jobs now. Having all the commonly used refrigerants in the gauge and not having to calculate superheat and subcooling has been nice. Battery life has been great also. The app is a great tool so you can watch pressures remotely.
J**E
Game Changer
I sure wish I had this tool forty years ago, when I had first started in my refrigeration career!. It has been a joy to use now, even though I am retired and only occasionally have to use it. Simple, accurate, and time-saving when compared to the old manifold gauge sets. I connect it to the system, sync it with the Testo app, and then monitor it. I can now record the evacuation and charging, and make any necessary adjustments to fine-tune the system. I have the vacuum and temperature gauges in a single, easy-to-read application. I can save the recordings to document the whole process. This is a high-quality instrument priced reasonably, and I love using it.
S**O
Accurate, easy to use
This manifold set is very easy to set up and use. Almost did not need the user manual. Unit is very solid in the hand. Wish the screen had more contrast to make it easier to read in bright sunlight. Backlight works well in shade or darkness. I like the fact that it came with signed calibration docs. I bought the Testo brand for its reputation for accuracy. Plastic case needs a little padding (which I added) for the gauge itself, but has room for wireless temp probes, hoses, other misc accessories. Very satisfied with the quality and value.
R**S
High-quality digital manifold
Why did you pick this product vs others?: This is my first set of digital manifold gauges. For the quality and features the price was way below some of the other brands that have also been out. The size was also a factor due to the fact that it can fit in one hand if needed. Look: The unit is very rugged. The outer casing seems very sturdy and protective of the unit itself. Connectivity: I bought the vacuum gauge and it Bluetooth perfectly Build quality: Solid feeling and very rugged Value for money: As compared to most basic units, it seemed to be the most cost-effective one for someone like me for this being my first digital manifold Quality: High-quality instrument Size: The ergonomic design you’re small enough to fit in one hand, making it very comfortable while carrying it or using it
T**N
A+
Great guages: PROS: 1) durable manifold that seems solid yet easy to handle, not big & bulky like others, 2) display has all that’s needed in one place to set sh & sc, 3) pressure & temp readings seem accurate, 4) screen holds up without cracking like some other brands, 5) I like the phone app that connects to it. CONS: 1)Both Valve controls seem to have some play in the off position, so I am not sure if the valve is entirely closed & can otherwise leak to mess up the hvac by bringing air or contaminates into the hvac lines. 2) sometimes I was unable to completely attach refig hoses to manifold, seems there is not enough clearance between the port & body of manifold to allow the low loss fitting to screw in, so I leave it alittle loose 3) it does not connect consistently with the phone app, it’s buggy & requires me to mess with the Bluetooth or logoff/login again, 4) unable to calibrate temp probes if needed, instructions says u gotta send it to a testo service loc. Ps- not a negative but a preference that I wish it was a soft storage case & not the hard plastic case which gets beat up so quickly.
J**N
Bluetooth connection is clunky. But worth the effort
Not had much time in the field but has impressed so far. seems like a solid well built device. Same exact kit as in supply houses but much much better price. Literally hundreds of dollars cheaper. Bluetooth connection is clunky. Phone is supposed to automatically connect when in range and app is on. Sometimes it takes far too long to actually connect. Sometimes it just doesn't connect at all, a way to manually connect to phone would make it better. Still haven't figured out exactly how the evacuation feature works. Not sure if it requires the evac sensor. Reporting feature on app is great. Entering customer info is a bit clunky but as a record keeping nut it's extremely useful so far.
J**D
Fired right up, no issues
Very easy to use. No issues, worked right away.
M**.
Me pone triste
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
Work great
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.
C**E
Good stuff
Excellent
M**.
Warranty?
Gauge stopped working, is there s warranty?
D**E
Testo 550 kit
Product as described
Trustpilot
5 days ago
2 months ago