NM01Z1560008
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Dakota NDT — BTL1-DL Ultrasonic Bolt Tension Monitor (Old Mini-Max)
Portable Bolt Elongation Measurement System with Version 2.0 Hardware Platform SKU: Z-156-0008Overview
The Dakota NDT BTL1-DL, formerly known as the Mini-Max, is a portable ultrasonic bolt tension monitor designed for accurate measurement of bolt elongation and load verification. Using ultrasonic technology, this instrument allows inspectors and technicians to evaluate fastener tension more directly than traditional torque-based methods.
Built on the updated version 2.0 hardware platform, the BTL1-DL provides improved performance, reliable data handling, and efficient field operation. The unit includes a temperature connector for use with Part # A-156-8001, allowing temperature compensation to support more accurate measurements in varying inspection conditions.
Compact, practical, and field-ready, this system is ideal for critical bolting applications in oil & gas, power generation, structural assemblies, and heavy industrial maintenance.
What's Included
| Item | Details |
|---|---|
| MiniMax / BT1-DL Unit | Ultrasonic bolt tension monitor |
| Batteries | 3 AA batteries |
| Couplant | 4 oz. bottle of ultrasonic couplant |
| USB Cable | USB Type A to Type C transfer cable |
| UT Cable | 10 ft Lemo to Microdot transducer cable |
| Carrying Case | Protective storage and transport case |
| PC Software | Utility software available by download |
| Documentation | Operation manual and certification |
| Temperature Connector | For use with Part # A-156-8001 |
Box Dimensions & Shipping Weight (Estimated)
| Parameter | Imperial |
|---|---|
| Length | 14.0 in |
| Width | 10.0 in |
| Height | 6.0 in |
| Dimensions (L × W × H) | 14.0 × 10.0 × 6.0 in |
| Weight | 5.0 lb |
Key Specifications
| Parameter | Details |
|---|---|
| Instrument Type | Ultrasonic bolt tension monitor |
| Model | BTL1-DL / Mini-Max |
| Hardware Platform | Version 2.0 |
| Measurement Method | Ultrasonic elongation measurement |
| Data Logging | Yes |
| Connectivity | USB Type A to Type C |
| Temperature Compensation | Connector included for Part # A-156-8001 |
| Operation | Portable / handheld |
Performance Features
Ultrasonic Bolt Measurement
Measures bolt elongation to support accurate tension and load verification.
Version 2.0 Hardware Platform
Provides updated performance and improved field usability.
Temperature Compensation Ready
Supports temperature-based correction when used with compatible accessories.
Data Transfer Capability
USB connection allows measurement data transfer for reporting and analysis.
User-Friendly Design
- Compact and portable for field use
- Simple setup for bolting applications
- Includes cable, couplant, batteries, and case
- Designed for efficient inspection workflows
Built for Industrial Environments
- Rugged design for field maintenance
- Reliable performance in demanding conditions
- Suitable for critical bolting inspections
- Designed for professional NDT applications
Compatibility
Compatible with:
- Dakota NDT bolt tension transducers
- Lemo to Microdot UT cable connections
- Temperature probe Part # A-156-8001
- PC utility software for data handling
Ideal Applications
- Bolt tension measurement
- Bolt elongation monitoring
- Flange assembly and verification
- Oil & gas and pipeline operations
- Power generation maintenance
- Heavy equipment and structural bolting
About Dakota NDT
Dakota NDT is a trusted manufacturer of ultrasonic testing instruments, providing reliable solutions for thickness measurement, flaw detection, and bolt tension monitoring. Their products are widely used in demanding industrial environments where accuracy, durability, and efficient field performance are essential.