- Size9-7/16” (239mm)W x 7-1/16” (180mm)H x 2-1/16” (53mm)D
- Weight4.95 lb (2.25 kg)
- Battery Power4 'C' Cells
- Display¼ VGA backlit. 3-7/8”(98mm)W x 3”(76mm)H
- Resolution0.00001 inch (0.0001mm).
The USM-3 Ultrasonic Stress Meter measures load and elongation in fasteners, tie bars and shafts of virtually any material from 12 inch to over 50 feet in length. Know the precise load, elongation or stress on your critical bolts. Track preload changes over any time period from minutes to years.The Norbar USM-3 Ultrasonic Bolt Meter, released in 2007 to replace the USM-II, is the world's most versatile instrument for the measurement of the actual clamp load in a fastener. The USM-3 can measure bolt preload or elongation extremely accurately in bolts of virtually any material from 12" (12mm) to over 50' (15m) in length; and from 5mm to over 36" (914mm) in diameter. Through the use of digital signal processing and automated signal diagnostics the USM-3 minimizes operator training and preparation. The Norbar USM-3 provides state of the art hardware and software to achieve measurements with maximum automation, minimizing operator interpretation. Offering digital recordation and transmission of data, as well as calibrated analog signal output, the USM-3 offers a complete system for measurement, recordation, and control of bolt tension in the most demanding applications.