Home / rest of / Ultra Sound Thickness Testers (NDA) Ultra Sound Thickness Testers (NDA) These compact battery powered Ultra Sound testers are inexpensive and easy to use. The standard model will test polyethylene up to 1/2 inch thick. The testing is done from one side of the part easily and quickly. Access to the back side of the part is not required. The test is non destructive and will not damage the part. The Non Destructive Ultra Sound Testers come complete with a case, couplant and transducer. They are ready to use when received. We offer testers made in the US and an economy model made in China.