Dakota NDT BT1-DL Handheld Bolt Tension Monitor

The Dakota NDT BT1-DL handheld bolt tension monitor accurately measures elongation allowing the gauges to accurately measure time (nanoseconds), elongation, load, stress, and %strain of a bolt. When nuts and bolts are fastened together under load, the action of tightening the nut increases the force applied to the bolt causing elongation.

By using ultrasonics, the BT1-DL bolt tension monitor is not affected by temperature, friction, or resistance factors affecting the accuracy of standard torque measurement techniques, allowing an accuracy within 0.00001 inch (0.0001 mm).

The gauge can be programmed to automatically stop the tightening process when the appropriate load has been applied by using the gauge’s USB interface together with the optional shut off accessory.

Features

• Measurement mode: Pulse-Echo (P-E)
• Measurement range: 1in to 50ft (25.4mm to 15.24m)
• Velocity calibration range: 0.0492 to 0.5510 in/μs (1250 to 13,995m/s)
• Detection: zero crossing
• Resolution: +/- 0.00001in (+/- 0.0001mm)
• Calibration: automatic, fixed, single, or two-point zero calibration options
• Quantities:
  • Time: nanoseconds
  • Elongation: change in length in inches/millimeters
  • Load: force load applied in pounds KIP or megapascals MPa
  • Stress: force for unit area stress applied in inches per inch or millimeters per millimeter
  • %Strain: ratio of elongation to effective length
  • Bolt Materials: select types from a preset or custom list
  • Repeatability Bar Graph: indicates stability of measurement
• Display views:
  • A-Scan: Rectified +/- (half wave view) or RF (full waveform view)
  • Large Digits (digital display only)
  • Alarm Limits Bar (hi and lo alarm limits for acceptable tolerance range)
• Transducer types: single element, 1 to 10MHz, 1/8 to 1in diameters
• Automatic temperature compensation
• Automatic, fixed, single, and two-point calibration options
• 64 custom user-defined setups
• Auto Set feature automates the detection, scope, and display setting process for each individual bolt
• 4GB internal memory
• 1/8in VGA grayscale display
• 30Hz screen refresh rate
• Direct USB-C 1.1 PC connectivity
• Meets IP65 requirements