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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📲 Stay cool, stay connected: The smart HVAC pro’s ultimate toolkit!

ALL IN ONE HVAC POWERHOUSE - Includes 2 wireless pipe clamp thermometers and 1 wireless micron gauge for seamless, multi-point system diagnostics.
PRECISION AT YOUR FINGERTIPS - Experience ultra-accurate temperature and pressure readings with ±0.9°F and ±0.5% accuracy—no guesswork, just confidence.
SMART CONNECTIVITY FOR PRO PROS - Bluetooth-enabled with the testo smart app for remote monitoring, automatic superheat/subcooling calculations, and instant job site reporting.
REFRIGERANT READY FUTURE PROOF - Supports all common refrigerants plus A2L types, keeping you ahead in evolving HVAC standards.
BUILT FOR EVERY CLIMATE CHALLENGE - Wide temperature range from -58°F to 302°F and pressure range up to 870 psi—ready for any HVAC or refrigeration task.

The Testo550s AC Manifold Gauge Set is a professional-grade HVAC and refrigeration diagnostic kit featuring wireless temperature and vacuum probes, precise pressure and temperature measurements, and Bluetooth connectivity. Compatible with a broad range of refrigerants including A2L types, it integrates with the testo smart app for remote operation, automatic calculations, and streamlined reporting—empowering technicians to optimize system performance efficiently on the go.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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