Testo 550i I App Operated Digital Manifold for air Conditioning, Refrigeration Systems and Heat Pumps – with Bluetooth

I purchased and returned several sets of gauges, both analog and digital before landing on this Testo set. These are the real deal. Easy to use and very accurate. There are some good looking china copycats that seem to be loaded with features but they fall flat in use and have horrible documentation and support. Testo is what you would expect with German made products and they do deliver all the way around. The interface is easy to use and read and each item is durable. There is no reason to buy "big yellow" when these are such a better deal. Nobody has more wireless sensors than these guys either.

I'm a 80 year old retired AC&R tech. Back in the day, we hardly even knew what superheat and subcooling even meant. Now days it is an essential part of servicing. The typical charging method of charging a vehicle was to remove all refrigerant, weigh it and recharge with spec. amount. I was able to charge my Odyssey by adjusting the subcooling and superheat as I charged it. When I felt the reading were in the zone, I was then able to close the hood and drive it around, while checking the readings.This tool is tough enough for day to day usage with the info needed for the modern tech.

Durable I have the probes too and a set of 550’s, depends on what I’m doing, but worth the money, good stuff

After loading the APP it was easy connecting to it. I would recommend these tools , because of the ease of operation.

system work great as it should. easy to set up and use.

Best set of manifold I’ve used yet. OTC HVAC Instructor

Small compact easy to use love testo products

This manifold is great, no more having to eyeball the PSI on the gauges or use multiple apps for getting subcool & superheat. I did buy 2 of the Testo 605i probes for getting my target superheat calculated. One more thing, it's great to watch from the 1st floor as a condenser unit that you just installed gets turned on for the first time

Estoy comprando poco a poco toda la gama de sondas para refrigeración. Estos manometros los compré como prueba inicial y estoy muy satisfecho. Ahora voy por los 550s