TM8812 Ultrasonic Thickness Gauge 1.2-200mm,0.05-8inch TM-8812

Had it for a couple of months. It's simple to use, dependable, and provides accurate measurements (perhaps +/- 0.1 mm); it's actually surprisingly good, given its comparatively low price. Note that the nominal measurement range (starting at 1.2 mm) is given for iron / steel / aluminum. For materials with slower sound propagation (e.g., brass, copper, lead, plastics), the minimum range will be proportionately lower.

Wow. Thought I’d take the leap and follow the positive reviews. I’m definitely not one to buy cheap tools especially measuring equipment. Normally I only buy Mitutoyo and some older US made Starrett but this little gem is fantastic. It’s not perfect but is very accurate on grey cast iron and practically dead on with aluminum. I use it to check engine blocks and see bore thickness and main webbing thickness. Can’t beat it especially for the price.

Bought this to check for core shift on cylinder walls and wall thickness when porting cylinder heads. Measures the provided check disc perfectly but it is all over the place on cast iron and painted flat steel. The good thing is it shows it thinnner than it really is so you have a little wiggle room. Maybe as I get better with it, my results will improve but for example, the bulkhead on my 6.5 diesel block is 10.25mm thick. The machine says it is 10.1mm thick. I tried it on all settings just in case but it never gets more accurate than that. For the price, vs what a real sonic probe costs, it beats guessing like I normally do.

I bought this to help me decide when parts on my combine, and hopefully other farm equipment, are wore out. Most places where I can have catastrophic failures are difficult to measure any other way. So far it seems to work quite well. I would like a little bit more range on the low side, but it does measure within its stated range. I checked it on a piece of sheet metal against a micrometer measurement and it was within 0.010". Which is close enough for me. All I need it to do is tell me where I have good steel and where I have tin foil.

Product works out very well. Very affordable product and has been in rough service crawling in and out of boilers. No problems at all with the UT device

Worked well with the calibration block in my office but would not measure in the field. Very poorly constructed meter.

Seems like a decent tester. One thing I noticed is Amazon shows that a calibration block is frequently bought with this. There is a little round calibration block built into the tester right next to where the wires connect. Save your $80 and use the built in calibration block!

Works great we use it around our shop for measuring wear on equipment parts and it works awesome for that, keeping in mind we are measuring differences of 1/16" or better haven't played with and checked tighter tolerances.