Bolt ultrasonic tension equipment

Listing ID #4888204

In certain critical bolting applications, factors such as friction or bolt/joint geometry are such that the measurement of applied torque alone will not provide the degree of accuracy necessary to control the preload to be monitored over the service life of the fastener. In these applications, ultrasonic measurement of fastener elongation and/or load has frequently proven to be the most accurate, reliable and cost effective solution.

Ultrasonic measurement of bolt preload is made possible by introducing a sonic pulse at one end of the fastener and accurately measuring the time of flight (TOF) required for the echo to return from the opposite end. Using material constants, the USM-3 converts this TOF into an “ultrasonic length” of the fastener, providing a baseline from which future measurements will be made. When the fastener is tightened, the TOF increases and the USM-3 will again utilise material constants to eliminate the effects of stress and temperature variations on sound velocity, providing an accurate elongation or load measurement.

specification

• Large 1/4 VGA back lit display is easily visible from a distance and in poor light.
• Can store up to 2000 measurements.
• Rugged steel and aluminium case designed for production and site environments.
• Measures fasteners of virtually any material from 1/2 inch (12mm) to over 50 feet (17m) in length.
• Measurement modes of pitch-catch and pulse-echo.
• Unit can be operated with mains power supply or via 4 ‘C’ cell batteries.
• Works with magnetic and glue on transducers from 1 MHz to 10 MHz.