Our Ultrasonic Bolt Tension Monitor defines state of the art in measurement of the actual elongation produced by tightening a threaded fastener.
Why utilize UT?
UT provides us the ability to get precision results in every application despite the inherent inaccuracies of known tightening methods. For instance, torque is limited by unknown friction factors. Elastic interactions from all methods contain unknown variables. Gasket creep and relaxation, flange rotation, flange misalignment and non-standard grip lengths (short bolts) all create factors beyond the control of operators. UT gives us a new, more accurate and convenient way to control the stretch of studs.
Alltite personnel are trained and experienced in the use and operation of Ultrasonic (UT) Bolt Measurement. This service benefits plants by helping to ascertain precise bolt load by utilizing Hooke's law which explains the direct proportional relationship between stretch and load. By using UT, you can determine the stretch on a fastener to a ten-thousandth of an inch. This will allow you to measure tension in fasteners in service operating close to yield and other critical applications.
How UT Works:
The measurement is achieved by determining the change in the transit time of an ultrasonic shock wave along the length of the fastener as the fastener is tightened by any method. The on-board microcomputer automatically interprets this time measurement to display the time(nanoseconds), elongation, load, stress, or % strain from stretching a fastener. Through the use of high speed digital signal processing and automated diagnostics, we can minimize the requirement for extensive operator training. With built in data recordation and reporting through an RS232 interface, the ultrasonic offers an easy to use and reliable solution to the most difficult bolting problems.