Dwyer Model UTG Ultrasonic Thickness Gauge, a handheld digital device used to measure the thickness of various materials like metal, plastic, and ceramics.
It features a digital display and a keypad with buttons for calibration, material velocity adjustment, and switching between metric (mm) and imperial (inch) units.
The device is designed for non-destructive testing and is often used to monitor corrosion in pipes, boilers, and pressure vessels by measuring from one side of the material.
The measuring range typically spans from 0.047 to 7.874 inches (or 1.2 to 200 mm) depending on the specific model and material being tested.