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TI-MAX MiniMax Bolt Tension Meter

Made in the USAThe TI-MiniMax, Ultrasonic Bolt Tension Monitor, defines the state of the art in the measurement of the actual elongation produced by tightening a threaded fastener.

The TI-MiniMax can measure the elongation very accurately in fasteners of virtually any material from 1/2 inch to 4 feet in length. The measurement is achieved by determining the change in the transit time of an ultrasonic shock wave along the length of the fastener as the fastener is tightened by any method.

The on-board microcomputer automatically interprets this time measurement to display the time(nanoseconds), elongation, load, stress, or %strain from stretching a fastener.


  • The first cost effective ultrasonic solution available on the market.
  • Visually compare the unloaded to the loaded waveform.
  • Display Options - RF, Rectified, Large Digits with Limits Bar.
  • Effectively monitor your bolts during periodic shutdowns over the service life of the fastener.
  • Measurement quantities - Time (nanoseconds), Elongation, Load, Stress, and %Strain.
  • Display Resolution - 1/8" VGA 240 x 160 pixels.
  • 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.


TICC-MVX Protective Holder for Ultrasonic Gauges

  • Constructed from heavy duty Cordura Nylon
  • Built-in belt loop
  • Includes wrist & shoulder straps

More details

TICC-MVX Protective Holder for Ultrasonic Gauges 126247

CF-AN Coupling Fluid

  • Used to create an ultrasonic coupling between the probe and material to be measured
  • Available in different volumes - 125ml / 250ml / 500ml / 1ltr / 5ltr / 25ltr

More details

CF-AN Coupling Fluid 126455

Li-Ion Rechargeable AA Batteries via the USB to USB-C

  • Li-Ion rechargeable battery
  • Stable voltage of 1,5 V over 95% of the runtime
  • Charged via the USB to USB-C cable

More details

Li-Ion Rechargeable AA Batteries via the USB to USB-C 127554

Complete Kit

The TI-MiniMax is supplied as a kit including:

  • Gauge
  • 2 AA batteries
  • Bottle of coupling fluid
  • USB Transfer Cable
  • Lemo to Microdot Transducer Cable
  • Windows Utility Software
  • Carrying Case
  • Operation Manual
  • (probe/transducer needs to be ordered separately)


The TI-MiniMax-C (with temperature connector) can only be ordered with the purchase of a temperature sensor A- 156-8001.


Probes/Transducers and Calibration blocks are sold separately !!!

Measuring RangeFrom 1” to 48” (25.4mm to 15,24 m) bolts
ElongationChange in length (inches/millimeters)
LoadForce load applied (pounds kIP or kN Kilonewtons)
StressForce for unit area stress applied (pounds kPSI or megapascals MPa)
Strain %Ratio of elongation to effective length
Resolution+/- .00001 inches (0.0001 mm)
Velocity Range.0492 to .5510 in m/s 1250 to 13995 m/s
CalibrationFixed, Single, and Two point zero calibration options. Select bolt material types from a preset or custom list.
UnitsEnglish & Metric / Fahrenheit & Centigrade
Measuring ModesPulse-Echo (standard) Pulse-Echo w/Gate (fine adjust)
PulserSquare wave pulser with adjustable pulse width (spike, thin, wide)
ReceiverManual or Auto Set gain control with 40dB range
TimingPrecision TCXO timing with single shot 100 MHz 8 bit ultra low power digitizer.
Display ModesA-Scan - Rectified +/- (half wave view), or RF (full waveform view)
Alarm LimitsSet hi and lo tolerances with audible beeper, viewable scan bar, and visual LEDs
Memory4GB internal SD memory
TransducerSingle Element (1 to 10 MHz & 1/8” to 1” diameters)
Transducer Cable Length10 foot (custom lengths available, inquire)
Temperature ProbeAutomatic temperature compensation
Setup Memory64 custom user defined setups. Factory setups can also be edited by the user
GateGate used to fine adjust where the detection point occurs
Auto SetAutomates the detection, scope,and display setting process for each individual bolt
Field CalibrationVector or Regression correction curve for increased accuracy using Load & Stress.
PowerThree AA cells. - Nicad 10 hrs - Alkaline 35 hrs - NI-MH 35 hrs Auto power off after 5 minutes idle.
DimensionsWidth (2.5in/63.5 mm) Height (6.5 in/165 mm) Depth (1.24 in/31.5 mm)
Weight13.5 ounces (with batteries)
Operating Temperature14 to 140F (-10C to 60C)


Related Products

MAX-II Bolt Tension Monitor

  • Large sunlight readable QVGA color display. (320 x 240 pixels)
  • Measures Elongation, Load, Stress, Strain and Time (nanoseconds).
  • New calibration function for swift and easy change of transducers and cables.

More details

MAX-II Bolt Tension Monitor

Buy Now

TI-MINIMAX-C Bolt Tension Gauge (BT1-DL)
€ 4.114,00 

CF-AN-250ml Coupling Fluid 250ml Bottle
€ 15,00 
TICC-MVX Nylon Protective Pouch for TI-Series Large
€ 101,00 
BATT-RC4AA-WC 4-pack 2100mAh AA Ni-MH Rechargeable Batteries & Charger Kit
€ 35,00 
X-000-0010 (3" and 6" Certified Cal Bars)
€ 672,00 
N-110-0020 Transducer Cable, Lemo to microdot Single ( 3 meter)
€ 101,00 
T-700-2405 1/8" 5mHz TI-MAX Probe Magnetic
€ 862,00 
T-700-4405 1/8" 10MHz TI-MAX Probe Magnetic
€ 884,00 
T-702-1405 1/4" 2.25mHz TI-MAX Probe Magnetic
€ 884,00 
T-702-2405 1/4" 5 MHz TI-MAX Probe Magnetic
€ 884,00 
T-702-4405 1/4" 10mHz TI-MAX Probe Magnetic
€ 907,00 
T-703-1405 - 3/8in, 2.25 Mhz TI-MAX Probe Magnetic
€ 896,00 
T-703-2405 3/8" 5mHz TI-MAX Probe Magnetic
€ 896,00 
T-704-1405 1/2" 2.25mHz TI-MAX Probe Magnetic (for Steel Bolts up to 1.3 Meter length)
€ 907,00 
T-704-2405 1/2" 5mHz TI-MAX Probe Magnetic
€ 907,00 
T-706-1405 3/4" 2.25 MHz TI-MAX Probe Magnetic
€ 968,00 
T-706-2405 3/4" 5 mHz TI-MAX Probe Magnetic
€ 968,00 
A-156-8001 Temperature Sensor
€ 627,00 
Li-Ion Rechargeable AA Batteries - 4 pcs (with USB to USB-C cable)
€ 25,00 
All mentioned prices are excluding VAT & excluding shipment costs.
Availability: Available: 1 - 3 days, Delivery time: 1 - 3 weeks, special order request