How can this unit provide an evacuation function but the unit does not accurately measure microns and requires a separate micron gauge?

You need a separate micron gauge

Is the warranty valid outside the US?

I don't know I would think so you would have to ship it back to were you bought it .

Do the games measure microns? or is the separate probe a must?

It will measure microns internally though the hoses. The probs only measure line temps. I have the wireless versions and the kit comes with the micron sensor

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testo 550s AC Manifold Gauge Set – Manifold Gauges HVAC – Incl. 2 Wired Temperature Clamp Probes – Recharge Kit with Superheat, Subcooling For AC, Refrigeration & Heat Pumps – Bluetooth

testo 550s AC Manifold Gauge Set – Manifold Gauges HVAC – Incl. 2 Wired Temperature Clamp Probes – Recharge Kit with Superheat, Subcooling For AC, Refrigeration & Heat Pumps – Bluetooth

Product ID: 279388855

Details

Brand
Testo
Item Weight
0.27 g
Item dimensions L x W x H
8.3 x 4.8 x
Material
Housing
Number of Items
1

📶Bluetooth wireless data sync

⚖️±0.5% pressure accuracy

🌡️Temp range -58° to 302°F

586621CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Elevate your HVAC game with precision and smart power!

RUGGED COMPACT READY - IP54-rated durable housing fits comfortably in your toolkit and withstands harsh jobsite conditions—professional gear that works as hard as you do.
WIDE MEASUREMENT SPECTRUM - Cover extreme conditions with a temperature range from -58° to 302°F and pressure range from -15 to 870 psi—built for the toughest environments.
SEAMLESS SMART CONNECTIVITY - Bluetooth-enabled manifold syncs effortlessly with the Testo Smart App for real-time data visualization, remote operation, and instant reporting—stay ahead with digital efficiency.
VERSATILITY FOR EVERY JOBSITE - Compatible with a wide range of refrigerants including A2L types, plus wireless temperature and vacuum probes—adapt to any HVAC or refrigeration challenge.
PRECISION THAT POWERS YOUR PERFORMANCE - Experience ultra-accurate temperature and pressure readings with ±0.5% pressure and ±0.9°F temperature accuracy—no guesswork, just confidence.

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. Designed for versatility, it supports a broad range of refrigerants including A2L types and includes wireless temperature and vacuum probes. Its rugged, compact design with IP54 protection ensures durability on any jobsite, making it an essential upgrade for HVAC professionals seeking efficiency and accuracy.

Specifications

ASIN	B08TY6JH9M
Best Sellers Rank	#26,366 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #9 in Manometers
Brand Name	Testo
Customer Reviews	4.6 4.6 out of 5 stars (546)
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
Manufacturer	Testo SE & Co. KGaA
Material Type	Housing Material: ABS/PA/TPE
Model	550s
Number of Items	1
Part Number	0564 5501 01
Unit Count	1 Count
Warranty Description	2 year manufacturer

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