The 27MG Ultrasonic Thickness Gage from Olympus is designed to make accurate measurements from one side on internally corroded or eroded metal pipes and structures. It weighs only 12 oz. (340 g) and is ergonomically designed for easy, one-hand operation. Despite its compact size, the 27MG has many innovative measurement features utilizing the same technologies that are available on more advanced thickness gages. The durable, rugged 27MG is battery-operated and features a large, backlit LCD with easy-to-read numerals, and an intuitive colourcoded keypad with direct access to many key features.