Ultrasonic Bolt Tension Monitors (Extensometers) measure the elongation produced by tightening a threaded fastener. Our line of monitors can measure the elongation very accurately in fasteners of virtually any material from 1/2 inch to 100 feet in length. The operator uses the to instrument measure the length of a bolt or fastener before it is tightened and again after it is tightened to calculate the delta or change in length. The on-board microcomputer automatically interprets this measurement to display the time (nanoseconds), elongation, load, stress, or %strain from stretching a fastener.
Bolt Tension Meter
The first cost effective ultrasonic solution available on the market
Effectively monitor your bolts during periodic shutdowns over the service life of the fastener
The MAX II Ultrasonic Bolt Tension Monitor is designed for precision measurement of fasteners up to 100 ft / 30 m in length. It incorporates all of the great features of the original MiniMax unit, with improved features, hardware, speed, and range. The MAX II is designed for use in a wide range of industrial and lab applications.