Testo 552 I Digital Vacuum Gauge I Micron Gauge with Bluetooth Support

It’s works well ... don’t plug on top of core removal just add a 1/4 hose on the side of core removal and attach to the micron guage for better results but works great and easy

I like the rugged polymer and rubber case, large number readout, backlight and bluetooth capability, my only gripe is the size of the unit, and that it didn’t come with a micron gauge coupler, but so far so good, I haven’t compared it to other micron gauges yet but it seems to be accurate because with my old micron gauge and this new one they both have shown that the vacuum pump is pulling down to 20 or less microns, buy the protection plan so if it flakes out within 4 years they will replace it. Two thumbs up.

I have the Testo 550, it doesn't measure microns and I couldn't afford to spend too much on a newer model at the moment but this micron Gauge is affordable, accurate and very convenient to use.

The media could not be loaded. I have used this micron meter one time so far and I’m extremely happy with it so far. I was afraid of the reviews saying it leaks internally but after I released the condenser I disconnected the hoses from the micron meter and heard the little psssst sound indicating it held the vacuum internally which made me feel good about this purchase.

At first I downloaded the wrong app, once I figured that out I was able to sit and monitor the vacuum from inside the house. The other nice part about the connection to the phone is the ability to trend how well the system held vacuum. You are looking for the micron level to flatline so, the trending will give you an idea if you still have something boiling off.

I've used this gauge on multiple short path distillation set ups. Works great. Fast delivery

First one would not hold vacuum. Replacement wouldn't either.Naturally, I thought "what are the chances? " So, before mailing back the first, bought some new YJ hoses and some isolation valves... same problem on both. One of the two leaked a little slower than the other, but both did.I know every micron gauge listing on Amazon has some reviews indicating the same problem. Maybe it's just hit or miss, but two strikes is enough for this brand. Shame too, because these are otherwise well made, and feel nice.On the other hand, Amazon has made returns very easy, so maybe roll those dice.. Just be sure to provide feedback, so others are better informed.

The media could not be loaded. Vendor didn’t want to sent a replacement, only offered a refund of $30 or a return. I wanted to return it, but decided to keep it at the end because it reads fine, but it doest hold vacuum. Let’s see how long it last.