Boltight has developed a fast and accurate device for measuring bolt load and bolt elongation that uses the latest ultrasonic technology. Called the Boltight Echometer, the device is used for monitoring critical bolting applications either during the installation of a new plant or while carrying out routine maintenance. The Echometer works by measuring the time of flight of a sound wave as it travels through a bolt. When the wave hits the end of the bolt, it reflects back into the transducer. This enables a measurement to be taken. Depending on how the device is set up, a reading is displayed in units of load, stress, or strain on a handheld screen the size of a mobile phone. (