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MAX-II Bolt Tension Monitor

Made in the USAThe Max-II Ultrasonic Bolt Tensioning Monitor is a precision instrument designed to measure the preload of fasteners up to 30m/100ft in length. It is the newest edition in a range of Ultrasonic Bolt Load Measurement Meters. The MAX-II data is interchangeable with the data from the MiniMax unit but adds features that make it more efficient and easier to work with. The MAX-II can be used in a wide range of industrial, offshore, service and laboratory applications.

The MAX-II Bolt Tension Monitor enables you to monitor, by means of an ultrasonic signal, the preload in a bolt during tightening and accurately check the residual load over the lifetime of the connection.

This 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 mechanical method. The MAX II then interprets this time measurement into a given quantity of time(nanoseconds), elongation, load, stress, or % strain while applying a load on the fastener.

Using a variety of processing and automation, the MAX II reduces operator error. With built-in data recordating and supporting DakView utility software for Windows PC & MAC OSX, the MAX II offers an easy to use and reliable solution to accommodate the most difficult bolting applications.

The MAX-II principle is by far the most accurate and economical system to measure and manage bolt stress in your assembly processes. Furthermore it enables you to revisit your bolts in certain intervals and monitor the quality of your bolt connections over time.

With its new "Auto Correlation" feature the MAX-II helps you to optimize your transducer placement which makes accurately re-reading the preload in a bolt easier.

The new large QVGA sunlight readable color display and the new calibration function make it very easy to use and provide all the great advantages without the steep learning curves associated with other models.

The MAX-II Bolt Tension Monitor can add great value to your assembly work. It can offer a huge contribution to safety, the environment, assembly time and the life span of all your bolt connections.

  • 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.
  • Auto Correlation function to find the optimal transducer placement .
  • Measure Modes: Pulse-Echo, Echo-Echo and Echo-Echo-Verify.
  • Supplied with software to manage measurements and setups.
  • PC interface reporting software
  • Auto Set: Automates the detection, scope, and display setting process for each individual bolt
  • Alarm Limits: Adjustable Hi/LO tolerances with visual LED’s and audible beeper. Hardware alarm outputs (accessory cable required)
  • Field Calibration: Vector or Regression correction curve for increased accuracy using Load & Stress
  • 4GB internal and up to 64GB external SD memory
  • USB 1.1 connectivity
  • Analog, serial & alarm outputs
  • Li-Ion pack & 6 AA emergency battery backup option
  • Setups: 64 custom user defined setups; factory setups can also be edited by the user
  • 2 year warranty
  • Gates: Three measurement gates, depending on measurement mode used, with adjustable start and threshold.
  • Field Calibration: Vector or Regression correction curve for increased accuracy using Load & Stress.


Complete Kit

The scope of delivery contains:

  • MAX II Bolt Tension Monitor
  • Foam fitted Case
  • Lemo to Microdot Transducer cable (N-110-0020)
  • Battery Charger
  • Coupling Fluid
  • USB Cable
  • NIST Certificate

Transducers and temp sensor need to be ordered separately!


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

MAX-II Offshore Case Waterproof Case for MAX II Ultrasonic Bolt Tension Gauge

  • rubber watertight seal
  • air vent button
  • impact resistant material

More details

MAX-II Offshore Case Waterproof Case for MAX II Ultrasonic Bolt Tension Gauge 127251

Category Coating Thickness Accessories

Accessories to extend the functionality of our coating thickness gauges. Test stands, calibration equipment, protective cases and much more.

More details

Category  Coating Thickness Accessories 0


Measuring Range:1 - 2540 cm (1 - 1000 inch)
This will vary depending on selected measuring mode
Length Units:Metric (mm), English (in) or time (µs)
Measuring Modes:Pulse-Echo (P-E), Echo-Echo (E-E), or Echo-Echo-Echo (E-EV).
Detection:Zero crossing
Velocity:1250–13995 m/s (0.0492 to .5510 in/µs)
Resolution: 0.0001mm (0.00001 in)
Stress Quantities:- Time – Nanoseconds.
- Elongation – Change in length (inches/millimeters).
- Load – Force load applied (pounds KIP or megapascals MPa).
- Stress – Force for unit area stress applied (inches per inch or millimeters per millimeter).
- %Strain – Ratio of elongation to effective length.
Display:Blanview sunlight readable QVGA TFT color display (320 x 240 pixels). Viewable area 4.54 x 3.40 in (115.2 x 86.4 mm), or 5.7 in (144.78 mm) diagonal. 16 color palete, multiple color options and variable brightness
Signal Pulser Modes:Spike, Square Wave & Tone Burst.Pulser Voltage: 100 – 400v.
Signal Pulser Width: Selectable step options Spike, Thin, Wide, HV Spike, HV Thin, HV Wide, TB .5MHz, TB 1MHz, TB 2MHz, TB 5MHz, TB 10 MHz. Spike 40 ns, Square Wave 80 to 400 ns, Tone Burst 50 ns to 1 microsecond.
Gain Setting:0 to 110dB with 0.2dB resolution. Manual and AGC control
Damping Settings:50, 75, 100, 300, 600, & 1500 ohms.
Memory:Log Formats: Grid (Alpha Numeric).
Capacity: 4 Gb internal & up to 64 Gb External SD slot.
Power: Lithium Ion Pack: 10.8v, 2 amp hrs
Supplied with 100-240 VAC 50-60 Hz Charger
Battery Life:Typical operation 18hrs on a full charge.
Protection Class:IP 65
Operating Temperature:-10 - 60 °C (14 - 140 °F)
Weight: (net)2.04 Kg (4.5 lbs) with batteries
Dimensions: W 216 x H 165 x D 70mm (8.5x6.5x2.5in)
Housing:Extruded aluminum body with nickel plated aluminum end caps (gasket sealed)
Display Views: RF (full wave view), +/- Rectified (half wave view), Digits, or split screen combination (wave plus large digits)
Environmental:Meets IP65 requirements
Power Connector12v @ 2amps, adapter 100-240 VAC, .7 Amps, 50-60 Hz.5 Pin Lemo (includes):RS232 Output – RS232 PC serial interface.Alarm Outputs – Two independent alarm outputs triggered by the gates.Analog Out – Proportional outputs (amplitude or distance), 0-10 volts.
USB:Direct USB 1.1 PC connectivity
Transducer Connectors: Two LEMO 00 connectors
Calibration:Automatic, Fixed, Single or Two-Point zero calibration options

Buy Now

MAX-II Bolt Tension Gauge (BT2-DL)
€ 5.265,00 

F-250-0006 Protective Pouch for MAXII Bolt Tension Gauge
€ 207,00 
X-000-0011 3" Steel Calibration Bar
€ 386,00 
X-000-0010 (3" and 6" Certified Cal Bars)
€ 672,00 
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 
N-704-0094 (1.20m) Single Lemo 00 to Spring Loaded 2 Pin fixture 1/8” Spacing
€ 252,00 
A-000-9001 Crystal 1/8", 7.5 MHZ, 12 pcs
€ 151,00 
N-110-0020 Transducer Cable, Lemo to microdot Single ( 3 meter)
€ 101,00 
N-110-0020-KEV Transducer Cable with Kevlar Shield, Lemo to microdot Single ( 3 meter)
€ 106,00 
A-156-8001 Temperature Sensor
€ 627,00 
MAX-II-CC - Waterproof Carrying case for MAX-II Bolt Tension Meter
€ 299,00 
TPG-KIT - Triple Path Glass Calibration Kit
€ 1.338,00 
All mentioned prices are excluding VAT & excluding shipment costs.
Availability: Available: 1 - 3 days, Delivery time: 1 - 3 weeks, special order request

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