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The MINI-MAX Ultrasonic Bolt Tension Monitor defines the state of the art in the measurement of the actual elongation produced by tightening a threaded fastener. MINI-MAX can measure the elongation very accurately in fasteners of virtually any material from 1/2 inch to 8 feet in length. 


  • The first cost effective ultrasonic solution available on the market.

  • Effectively monitor your bolts during periodic shutdowns over the service life of the fastener.

  • Visually compare the unloaded to the loaded waveform.

  • Measurement quanities – Time (nanoseconds), Elongation, Load, Stress, and Percent Strain.

  • Display Options – RF, Rectified, Large Digits with Limits Bar.

  • Display Resolution – 1/8″ VGA 240 x 160 pixels.

  • Stores 8000 readings and waveforms in multiple groups.

  • Built-in Linear regression or vector for optimizing load measurements.

  • The Auto Set feature automatically optimizes detection and adjusts display.

  • Hi/Lo alarm tolerance limits work in conjunction with the data port and external pump shut-off device.

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