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testo 550s AC Manifold Gauge Set – Manifold Gauges Hvac and Refrigeration – Incl. 2 Wired Temperature Clamp Probes – AC Recharge Kit with superheat, subcooling and Bluetooth

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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Aug 7
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Style: Basic Kit


Pattern Name: Digital Manifold


Features

  • Versatile; The testo AC manifold gauge set offers extremely precise readings of temperature and pressure on air conditioning systems, refrigeration, as well as heat pumps
  • Wide Range; With testo s ac manifold, you can take advantage of the wide temperature measuring range of -58 to 302 F / -50 to +150 C and pressure measuring range of -15 to 870 psi / -1 to 60 bar
  • Precise; The ac recharge kit provides reliable data with a temperature accuracy +-0.9 F / +-0.5 C and pressure measurement accuracy of +-0.5 % of full-scale value
  • Probes; Obtain accurate measurements of temperature, pressure, or vacuum with the hvac manifold gauge set. The kit includes 2 wireless temperature probes and 1 wireless vacuum probe, making system analysis and optimization quick and easy
  • Features; The testo hvac gauges supports most common refrigerant types, as well as A2L refrigerants. Combined with the testo smart app, the gauge produces automatic calculations of superheat and subcooling
  • Smart App; Take advantage of clearly visualized documentation from a smartphone or tablet. Remotely operate your refrigerant gauges, execute service and maintenance tasks, and send results directly from the job site

Description

Testo 550s Digital Manifold Kit The Testo 550s is an advanced digital manifold designed to meet the demands of HVAC professionals working on refrigeration and air conditioning systems, as well as heat pumps. Built for precision, efficiency, and ease of use, it streamlines system diagnostics by providing highly accurate pressure and temperature measurements. Its rugged, compact design ensures durability in harsh working conditions, while the large display allows for easy readability of all critical data at a glance. With integrated Bluetooth connectivity, the Testo 550s enhances workflow efficiency by wirelessly transmitting measurement data to the Testo Smart App, where users can analyze results, generate reports, and store documentation in real-time. This seamless digital integration reduces manual errors, improves reporting accuracy, and simplifies system monitoring, making it an indispensable tool for professionals seeking to optimize their processes. Designed for versatility, the Testo 550s is compatible with a broad range of refrigerants, including A2L refrigerants, ensuring compliance with modern industry standards. Technical Data Testo 550s Temperature Measurement Range: -58° to 302°F (-50 to +150°C) Temperature Measurement Accuracy: +-0.9°F (+-0.5°C) Pressure Measurement Range: -15 to 870 psi (-1 to 60 bar) Pressure Measurement Accuracy: +-0.5% Full Scale Dimensions: 8.27 x 4.76 x 2.36 inches (210 x 121 x 60 mm) Weight: 29.14 oz (826 g) Operating Temperature: -4° to 122°F (-20 to +50°C) Protection Class: IP54 Depending on the selected kit, additional accessories such as temperature probes, vacuum measurement instruments, or a protective transport case may be included, providing a tailored solution that meets the diverse needs of HVAC professionals.

Brand: Testo


Material: Housing Material ABS/PA/TPE


Item dimensions L x W x H: 8.3 x 4.8 x 2.4 inches


Item Weight: 0.01 Ounces


Screen Size: 4.8 Inches


Product Dimensions ‏ : ‎ 8.3 x 4.8 x 2.4 inches; 0.01 ounces


Item model number ‏ : ‎ 550s


Batteries ‏ : ‎ 4 AA batteries required. (included)


Date First Available ‏ : ‎ January 25, 2021


Manufacturer ‏ : ‎ Testo SE & Co. KGaA


Country of Origin ‏ : ‎ China


Best Sellers Rank: #10,398 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #4 in Manometers


#4 in Manometers:


Customer Reviews: 4.6 4.6 out of 5 stars 704 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Aug 7

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Testo 550s AC Manifold Gauge Set for Professional Technicians
Style: Basic Kit Pattern Name: Digital Manifold
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. ... show more
Reviewed in the United States on June 17, 2023 by TMGCJ57
    • High-quality digital manifold
Style: Basic Kit Pattern Name: 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 ... show more
Reviewed in the United States on July 11, 2025 by Russ Williams
    • Testo Digital Gauges With App Control
Style: Temperature Kit Pattern Name: Digital Manifold
Review Image by Chris Chris
Review Image by Chris Chris
Review Image by Chris Chris
Review Image by Chris Chris
Review Image by Chris Chris
Review Image by Chris Chris
Review Image by Chris Chris
I did a lot of research when looking into a gauge / manifold for working on HVAC systems. What was important to me was accuracy and simplicity and I'm glad I spent a little extra on this digital manifold vs some of the cheaper analog systems. The biggest benefit of using a system like this is that you can select what you want on the screen, work with different refrigerant types, and it automatically calculates values (like superheat and subcool) automatically if you have the proper gauges hooked up. The wireless sensors (temperature clamps) work in conjunction with the hoses reading temperature / pressure of the high and low side ports. This is what allows you to know the subcool and superheat. There are also places in the case (which is a hard shell case) for other wireless sensors, so I am storing the digital probes and vacuum probe. I ultimately purchased the wireless digital probes alongside this unit because I wanted the flexibility to use a more traditional gauge, or if I wanted a quick reading, just use the digital probes. These are great because they hook up directly to the High / Low ports, and you don't need to use hoses so when testing on an existing system, you are losing next to no refrigerant. The App works as a sort of 'second screen' to the main manifold. You can track and graph readings over time, so you can see a graph of temperature / pressure change as you are working on the system, or when filling. One note, some other reviews mentioned that it eats through batteries - I've not experienced any issues and still using the same batteries from 3+ months ago. Overall, this has been one of the most vital pieces to building a toolkit to work on HVAC systems and at a much more competitive price when compared to other digital manifolds. ... show more
Reviewed in the United States on October 8, 2023 by Chris Chris
    • Good instrument but Better Service
Style: Basic Kit Pattern Name: Digital Manifold
is a gauge, a manifold, you are a tech and that the reason to buy this unit. So now why 5 starts, I had a issue with the instruments after 2 months of used, I think was software related (not able to restart and consuming the batteries fast) what I still made me keep it is the service that I got after the issue, I send a mail to Testo services and they reply faster and after I sent the instrument, they fixed no questions ask. (of course even if it was a software or hardware related I like the fast response from the service) ... show more
Reviewed in the United States on July 6, 2025 by Augusto
    • Does not come with hoses
Style: Basic Kit Pattern Name: Digital Manifold
Actually gave me a good laugh when I opened up the package to find out that hoses were not included.
Reviewed in the United States on June 20, 2025 by Matt M.
    • Great set of gauges!
Style: Basic Kit Pattern Name: Digital Manifold
Couldn't be happier. Used it on my own air conditioner/heat pump, And you can just tell it's high quality. Can't wait to use this in the field.
Reviewed in the United States on April 12, 2025 by Nate
    • Testo products never let me down.
Style: Basic Kit Pattern Name: Digital Manifold
Quality is great for the money. Use this product everyday. You can charge a unit right through sub cooling. The case keeps it protected when not in use.
Reviewed in the United States on July 16, 2025 by Scott kelbaugh
    • Replaced my old testos 550 and these are great!
Style: Basic Kit Pattern Name: Digital Manifold
Great tool, feels a bit more tobust than my old 550. Highly recommend
Reviewed in the United States on July 4, 2025 by jorge rendon

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