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USM-3 (Rental Only)

The Ultrasonic Stress Meter - USM-3 is a hand held instrument including; AC adaptor, nylon carrying case, storage case, transducer cable, RS232 data transfer cable, 4 oz couplant and operation manual.

Requires Transducer which is sold separately.

Overview of Ultrasonic Measurement

The following series of Web pages presents an 'Overview of Ultrasonic Measurement' of fasteners. Ultrasonic measurement provides a very precise method of determining the elongation of a fastener due to tightening. This elongation is proportional to the load force exerted on the fastener.


Required Equipment

Bolt Preparation

Calibrating the Ultrasonics

Measuring the Unloaded Lengths

Measuring the Elongation

Producing Reports


Software Updates

As we continue to make improvements to the USM instrument, we may find it necessary to update the software. To download the latest version to your USM, you will need both of the following files. (To do this 'right click' on link and select 'Save Target As...', save to Desktop or a relevant Directory):


 Version 1.4 and Hiflash.exe (Please click here to download the latest release information)

Old versions of the software are: Version 1.3 and Version 1.2.

(Tip: When downloading any of the above files, please right click on the link and select 'Save Target As...', change the 'Save as type:' to 'all files', select the relevant Directory or Desktop and then press 'Save').


Sonic Bolt Utility Software

The USM-II can produce reports by sending data over its RS-232 port.

The reports can be sent to a printer directly, to a computer using a communications port, or to a computer using the SonicBolt Software. The report format is designed to be imported into a spreadsheet software for creating graphs and data analysis.

Install SonicBolt Utility Software v2.1e

This program is for use with the Norbar USM instrument only and is provided without warranty of any kind. Norbar makes no claim to it's suitability or use and shall not be liable for any damages whatsoever caused by installation or use of the software.

  • Part number: 40334
  • EAN Bar Code: 5060922235442
  • NATO number: -
  • Accuracy: -
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