The Mextech TM-8810 Ultrasonic Thickness Meter is a versatile and easy-to-use tool for measuring the thickness of a wide range of materials. The TM-8810 has a wide measurement range of 1.2 to 200 mm and a high resolution of 0.1 mm. The Mextech Depth Gauge is an exceptional quality gauge that is reasonably low in price. It is accurate to within 0.5%n+0.1, making it a great choice for measuring and testing.