AMTAST Digital Concrete Test Hammer Concrete Rebound Hammer Tester with LCD Display Portable Concrete Schmidt Hammer with 10 Hours of Continuous Operation Used for Home Engineers (Model AMT156)

My engineer says this is the best yet!

I purchased to complete roll hardness test for non woven material. It does a great job, and it is easy to use after reviewing the manual. It’s a lot cheaper than parotester. The only complaint is that our places a large dent in your roll because it is designed for concrete.

The first time I used it it worked fine, but then when I take measurements with the hammer, everything appears fine on the screen but it does not save the data in memory. every time I have to do concrete tests, I have to take the measurements manually and do the statistical calculations myself