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Bolt Tension Meter and Monitors

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 4 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.