The Dakota FX81-DL is the flaw detector ultrasonic benchtop unit with large display, A-Scan, B-Scan and dual mode flaw detection and thickness measurement. A professional instrument for the laboratory.
- Dual mode : Flaws and thickness
- A-Scan : Waveform display
- B-Scan : Real-time flaw profile
- Large display : High-contrast reading
- DAC TCG : Automatic compensation curves
- Extended datalogger : Full inspection traceability
- P/N Z-251-0001 : Official Dakota part number
The Dakota FX81-DL is an ultrasonic flaw detector in a benchtop version, designed for laboratory and workshop applications that call for a large display and complete diagnostic capabilities. It combines flaw detection and thickness measurement in a single instrument, with professional traceability of inspections, Designed for certified NDT inspectors and quality managers in industrial laboratories.
Key features include A-Scan display and B-Scan, DAC and TCG curves for flaw evaluation, dual mode flaw + thickness operation, extended datalogger with structured inspection organisation and USB output. Compatible with the Dakota transducer range, dual and single element, for diverse NDT applications, Large display and interface optimised for extended analysis at a fixed workstation.
Benchtop Flaw Detector
Indicato per controlli non distruttivi in laboratori NDT, officine meccaniche, ispezione saldature, fusioni e componenti aeronautici. Disponibile presso RODER SRL, distributore ufficiale Dakota NDT, con taratura, riparazione e supporto tecnico dedicato. P/N Z-251-0001, soluzione di riferimento per controlli professionali, Strumento di riferimento per servizi di ispezione che eseguono attività ad alta complessità.
The Dakota FX81-DL (P/N Z-251-0001, technical designation DFX-8+) is the benchtop ultrasonic flaw detector of the Dakota NDT range — a laboratory or fixed-workstation instrument that brings the same advanced flaw detection technology as the portable FX70-DL / FX71-DL into a larger form factor, with a larger display, extended battery life (6 AA batteries + USB power) and performance optimised for intensive use in controlled environments. Compliant with EN 12668-1, it supports every detect mode (Zero Crossing, Flank, Peak, TRIG, DAC, TCG), 4 GB memory with A-Scan/B-Scan in alphanumeric batches, and grid batching with the OBSTRUCT flag.
Positioning within the Dakota Flaw Detector range
The Dakota Flaw Detector range comprises two models with different form factors, intended for different operating contexts but built on the same DFX technology:
- FX70-DL / FX71-DL portable (397 g, 3×AA, P/N Z-221-0005) for field inspections, difficult access and in-service maintenance
- FX81-DL benchtop (2.04 kg, 6×AA + USB, P/N Z-251-0001) for the laboratory, production quality control, training and repetitive inspections from a fixed workstation
The measurement modes, detect formats, memory and software are identical: both models generate compatible data that can be processed with the same DakMaster™ — enabling integrated workflows between field inspection (FX70) and laboratory analysis (FX81).
When to choose the Dakota FX81-DL
- Quality control laboratories in production — repetitive inspection of castings, forgings and welds
- NDT training centres (Level I/II/III personnel training) — larger display, bench ergonomics
- Production inspections with parts brought to the laboratory after machining
- Certification workshops for welded components (AWS, ISO, ASME)
- Research & Development: characterisation of new materials, process validation
- A need for extended battery life: 6 AA batteries give 12 hours of continuous use
- Use with USB mains power for unlimited sessions
- Users who prefer a fixed workstation with only occasional transport in a carrying case
- Users who want maximum display legibility for in-depth analysis
Need help choosing the right product?
Documentation downloads
Official Dakota NDT technical documentation. Files open in a new tab.
Key features
- 2-in-1 platform: flaw detector + thickness gauge
- 5 detect modes: Zero Crossing, Flank, Peak, TRIG, DAC
- Automatic TCG for attenuation compensation
- Benchtop-size A-Scan and B-Scan display
- 4 GB memory with A-Scan/B-Scan in alphanumeric batches
- Grid batching with the OBSTRUCT flag for inaccessible positions
- Sequential and grid logging
- Configurable pass/fail limits with audible and visual alarms
- 12-hour battery life with alkaline cells (6 × AA)
- Alternative USB power for unlimited indoor use
- USB transfer to PC with DakMaster™ software
- Firmware update via USB
- Temperature range: -10 ÷ +60 °C
- NIST-traceable calibration certificate supplied as standard
- EN 12668-1 compliance
Flaw detection modes
The FX81-DL supports the same 5 detect modes as the portable model, essential for compliance with weld inspection standards:
- Zero Crossing: measurement at the first crossing of the x axis after the gate triggers (standard)
- Flank: measurement on the flank of the triggered signal
- Peak: measurement at the signal’s maximum peak
- TRIG: 2D location with angle beam transducers (surface distance + depth, curved surface correction)
- DAC: Distance Amplitude Correction curves for classifying flaws at varying distances
- TCG: automatic Time Corrected Gain
For more on the detect modes and their application in weld inspection, see AWS D1.1 and ultrasonic weld inspection.
Technical specifications
| Parameter | Value |
| Part Number | Z-251-0001 |
| Technical designation | DFX-8+ |
| Function | Flaw Detector + Thickness Gauge |
| Form factor | Benchtop |
| Detection modes | Zero Crossing, Flank, Peak, TRIG, DAC |
| Time Corrected Gain | Yes, automatic |
| A-Scan | Yes |
| B-Scan | Yes |
| Memoria | 4 GB internal |
| Logging | Sequential + Grid with OBSTRUCT flag, alphanumeric batches, A/B-Scan for every measurement |
| Pass/fail limits | Configurable with alarms |
| Data output | USB to PC |
| Software | DakMaster™ |
| Firmware update | Via USB |
| Operating temperature | -10 ÷ +60 °C |
| Power supply | 6 × AA + via USB |
| Battery life | 12 h alkaline / 5 h NiCd / 12 h NiMH |
| Peso | 2.04 kg (batteries included) |
| Dimensioni | 216 × 165 × 70 mm |
Confronto FX70-DL vs FX81-DL
| Caratteristica | FX70-DL / FX71-DL | FX81-DL |
| Part Number | Z-221-0005 | Z-251-0001 |
| Form factor | Portatile | Benchtop |
| Peso | 397 g | 2,04 kg |
| Dimensioni | 63,5 × 165 × 31,5 mm | 216 × 165 × 70 mm |
| Batterie | 3 × AA (12h) | 6 × AA (12h) |
| Detect functions | Identiche (Zero Crossing, Flank, Peak, TRIG, DAC, TCG) | |
| Memoria | 4 GB (identica) | |
| Compliance | EN 12668-1 | |
| Scenario ideale | Field inspections | Laboratorio, produzione, training |
Compatible transducers
The FX81-DL supports the full Dakota flaw detection transducer range:
- Normal (0°) single element transducers for straight-beam inspection
- Angle beam transducers with 45°, 60°, 70° wedges for weld inspection
- Dual element transducers for corrosion measurement
- Delay line transducers for thin thicknesses
- TR (Transmit/Receive) transducers for specific applications
- Frequenze: 1, 2, 4, 5, 10 MHz a seconda dell’applicazione
To choose the right transducer: How to choose the right ultrasonic transducer.
Applicazioni tipiche
- Quality control laboratories in metalworking production
- NDT training centres (certified Level I/II/III courses)
- Weld inspection of components brought to the laboratory
- Quality control of aerospace components before shipment
- Inspection of precision castings and forgings
- Automotive industry: inspection of structural parts and welds
- Rail sector: inspection of axles, wheels and rolling stock components
- Research & Development: characterisation of new materials
- Certification of pressure vessel components before commissioning
- Reverse engineering with retrospective flaw analysis
Guide applicative consigliate:
- AWS D1.1 and ultrasonic weld inspection: requirements and instruments
- Ultrasonic weld inspection to AWS D1.1 with the Dakota FX70-DL
- Data logger vs manual recording
- How to choose the right ultrasonic transducer
- NDT in aerospace: precision measurement on aluminium and titanium
Scope of supply
- Strumento Dakota FX81-DL
- Power cable
- Ultrasonic couplant
- Manuale operativo
- Rigid carrying case
- NIST-traceable calibration certificate
- 6 batterie AA
- USB cable for data transfer
- Software DakMaster™
Note: the transducer is not included. For optimal sizing based on your application, contact us.
Normative e certificazioni
- EN 12668-1 — ultrasonic flaw detection equipment
- NIST-traceable factory calibration
- MIL-STD-45662A compliance
- CE marking and EMC compliance
- Thickness gauge mode compliant with ASTM E797 and EN 14127
- Calibration certificate supplied as standard
Domande frequenti
It depends on the operating scenario. For field inspections or awkward positions the portable FX70-DL is unbeatable. For predominantly laboratory use, production quality control, training or inspection of components brought to the bench, the FX81-DL offers greater ergonomics and battery life. Many organisations adopt both to cover every scenario, with data interchangeable through DakMaster™.
Not necessarily. It can be powered by 6 AA batteries (12 h with alkaline cells) or via USB. At a fixed workstation, USB power from a PC or a dedicated supply is convenient; for off-grid sessions the AA batteries guarantee a full day of inspections.
Yes. The FX81-DL supports TRIG mode for 2D location with angle beam transducers and DAC mode for flaw classification, both required for weld inspection to AWS D1.1. It is also EN 12668-1 compliant for European regulatory conformity.
Yes. The A-Scans and B-Scans stored in memory are transferred via USB to the PC and analysed with DakMaster™, which allows export in standard formats for professional reports. Every measurement is linked to an alphanumeric batch with a date/time stamp for full traceability.
In grid batching mode, the operator can flag inaccessible positions with the OBSTRUCT flag instead of leaving them empty. This preserves the consistency of the inspection grid and lets the final report correctly document the areas that cannot be measured — something many structural inspection standards require.
Request a tailored quotation for the Dakota FX81-DL
We will help you choose the most suitable transducers and configure the kit for your laboratory. Contact us for dedicated technical advice or to arrange a demonstration.
Dakota FX71-DL and FX81-DL flaw detectors
DAKOTANDT FX GAUGES – INSTRUMENTS
| Part Number | Description |
|---|---|
| Z-221-0005 | Dakota FX71-DL Hand-Held Flaw Detector (DFX-7+) |
| Z-251-0003 | Dakota FX81-DL Flaw Detector (DFX-8+) |
SPARE PARTS / ACCESSORIES – FX71
| Part Number | Description |
|---|---|
| F-149-0001 | FX71 Gauge Instrument Case: Nylon |
| A-149-6002 | FX71 Gauge Instrument Case: Rubber |
| A-100-6003 | FX71 Gauge Plastic Transit Case |
| N-003-0330 | USB-C to USB TYPE A 3′ Data Cable – V2.0 Gauges |
SPARE PARTS / ACCESSORIES – FX81
| Part Number | Description |
|---|---|
| F-250-0006 | Instrument Case (with straps) for FX81 & BT2-DL |
| A-250-6002 | FX81 Gauge Plastic Transit Case |
| B-040-3200 | Lithium Ion Battery Pack |
| N-250-0001 | Power Adaptor, 12V @ 2A with 1.8m (6′) Cable |
| N-506-0060 | Universal Power Cord |
| N-110-0470 | 3m (10′) Lemo 1 5pin to BNC Analog Output Cable |
| N-110-0410 | 3m (10′) Lemo 1 5pin to DB9F Serial Output Cable |
| N-306-0416 | Universal Cable (5Pin Lemo 1-BNC, 6′ DB9 & 2 6′ Alarm Out) |
SINGLE ELEMENT TRANSDUCER CABLES – FX71
| Part Number | Description |
|---|---|
| N-104-0020 | Transducer Cable: 1.2m (4′) Single Lemo 00 to Microdot |
| N-104-0070 | Transducer Cable: 1.2m (4′) Single Lemo 00 to BNC |
| N-104-0000 | Transducer Cable: 1.2m (4′) Single Lemo 00 to Lemo 00 – Prove up transducer |
SINGLE ELEMENT TRANSDUCER CABLES – FX81
| Part Number | Description |
|---|---|
| N-106-0020 | Transducer Cable: 1.8m (6′) Single Lemo 00 to Microdot |
| N-106-0100 | Transducer Cable: 1.8m (6′) Single Lemo 00 to BNC |
DUAL ELEMENT TRANSDUCER CABLES – FX71
| Part Number | Description |
|---|---|
| N-204-0020 | Transducer Cable: 1.2m (4′) Dual Lemo to Microdot |
| N-204-0000 | Transducer Cable: 1.2m (4′) Dual Lemo to Lemo |
SINGLE ELEMENT HIGH WEAR CONTACT TRANSDUCERS
| Part Number | Type | Frequency | Diameter | Connector |
|---|---|---|---|---|
| T-8040-0868 | Single Element – Hi-Wear Contact, Composite | 1 MHz | 1/2″ | BNC (n/a) |
| T-8070-0868 | Single Element – Hi-Wear Contact, Composite | 1 MHz | 1″ | BNC (n/a) |
| T-8040-1878 | Single Element – Hi-Wear Contact, Composite | 2.25 MHz | 1/2″ | BNC (n/a) |
| T-8070-1878 | Single Element – Hi-Wear Contact, Composite | 2.25 MHz | 1″ | BNC (n/a) |
| T-8040-2878 | Single Element – Hi-Wear Contact, Composite | 5 MHz | 1/2″ | BNC (n/a) |
| T-8070-2878 | Single Element – Hi-Wear Contact, Composite | 5 MHz | 1″ | BNC (n/a) |
SINGLE ELEMENT FINGER TIP TRANSDUCERS
| Part Number | Type | Frequency | Diameter | Connector |
|---|---|---|---|---|
| T-4023-1855 | Single Element – Finger Tip Contact | 2.25 MHz | 1/4″ | Microdot (Side) |
| T-4033-1855 | Single Element – Finger Tip Contact | 2.25 MHz | 3/8″ | Microdot (Side) |
| T-4043-1855 | Single Element – Finger Tip Contact | 2.25 MHz | 1/2″ | Microdot (Side) |
| T-4023-2855 | Single Element – Finger Tip Contact | 5 MHz | 1/4″ | Microdot (Side) |
| T-4033-2855 | Single Element – Finger Tip Contact | 5 MHz | 3/8″ | Microdot (Side) |
| T-4043-2855 | Single Element – Finger Tip Contact | 5 MHz | 1/2″ | Microdot (Side) |
| T-4023-4855 | Single Element – Finger Tip Contact | 10 MHz | 1/4″ | Microdot (Side) |
| T-4033-4855 | Single Element – Finger Tip Contact | 10 MHz | 3/8″ | Microdot (Side) |
| T-4043-4855 | Single Element – Finger Tip Contact | 10 MHz | 1/2″ | Microdot (Side) |
| T-5903-2875 | Single Element – Finger Tip Slim Line | 5 MHz | 1/8″ | Microdot (Top) |
| T-5903-4875 | Single Element – Finger Tip Slim Line | 10 MHz | 1/8″ | Microdot (Top) |
ANGLE BEAM TRANSDUCERS – Standard Shear Wave (SS)
| Part Number | Type | Frequency | Diameter | Connector |
|---|---|---|---|---|
| T-8044-1848 | Standard Shear Wave – High-Gain | 2.25 MHz | 1/2″ x 1/2″ | |
| T-8054-1848 | Standard Shear Wave – High-Gain | 2.25 MHz | 5/8″ x 5/8″ | |
| T-8044-2848 | Standard Shear Wave – High-Gain | 5 MHz | 1/2″ x 1/2″ | |
| T-8054-2848 | Standard Shear Wave – High-Gain | 5 MHz | 5/8″ x 5/8″ |
WEDGES for SS Standard Shear Wave (Standard Wedge)
| Part Number | Type | Frequency | Diameter | Connector |
|---|---|---|---|---|
| X-004-0014 | Standard Wedge | 45° | 1/2″ x 1/2″ | |
| X-004-0020 | Standard Wedge | 45° | 5/8″ x 5/8″ | |
| X-004-0015 | Standard Wedge | 60° | 1/2″ x 1/2″ | |
| X-004-0021 | Standard Wedge | 60° | 5/8″ x 5/8″ | |
| X-004-0016 | Standard Wedge | 70° | 1/2″ x 1/2″ | |
| X-004-0022 | Standard Wedge | 70° | 5/8″ x 5/8″ |
WEDGES for SS Standard Shear Wave (Snail / AWS Type)
| Part Number | Type | Frequency | Diameter | Connector |
|---|---|---|---|---|
| X-004-0023 | Snail (AWS Type) Wedge | 45° | 5/8″ x 5/8″ | |
| X-004-0024 | Snail (AWS Type) Wedge | 60° | 5/8″ x 5/8″ | |
| X-004-0025 | Snail (AWS Type) Wedge | 70° | 5/8″ x 5/8″ |
ANGLE BEAM TRANSDUCERS – Quick Change Shear Wave (QC)
| Part Number | Type | Frequency | Diameter | Connector |
|---|---|---|---|---|
| T-5035-1845 | Quick Change Threaded Shear Wave – High-Gain | 2.25 MHz | 3/8″ | Microdot |
| T-5045-1845 | Quick Change Threaded Shear Wave – High-Gain | 2.25 MHz | 1/2″ | Microdot |
| T-5025-2845 | Quick Change Threaded Shear Wave – High-Gain | 5 MHz | 1/4″ | Microdot |
| T-5035-2845 | Quick Change Threaded Shear Wave – High-Gain | 5 MHz | 3/8″ | Microdot |
| T-5045-2845 | Quick Change Threaded Shear Wave – High-Gain | 5 MHz | 1/2″ | Microdot |
| T-5025-4845 | Quick Change Threaded Shear Wave – High-Gain | 10 MHz | 1/4″ | Microdot |
WEDGES for Quick Change Shear Wave Transducers
| Part Number | Type | Frequency | Diameter | Connector |
|---|---|---|---|---|
| X-004-0038 | Standard QC Wedge | 45° | 1/4″ | |
| X-004-0041 | Standard QC Wedge | 45° | 3/8″ | |
| X-004-0044 | Standard QC Wedge | 45° | 1/2″ | |
| X-004-0039 | Standard QC Wedge | 60° | 1/4″ | |
| X-004-0042 | Standard QC Wedge | 60° | 3/8″ | |
| X-004-0045 | Standard QC Wedge | 60° | 1/2″ | |
| X-004-0040 | Standard QC Wedge | 70° | 1/4″ | |
| X-004-0043 | Standard QC Wedge | 70° | 3/8″ | |
| X-004-0046 | Standard QC Wedge | 70° | 1/2″ |
INTEGRAL WELD INSPECTION TRANSDUCERS – 10mm diameter
| Part Number | Description |
|---|---|
| TF4M0045 | Transducer: 4MHz Standard Shear Wave; 45° – 10mm Dia – Lemo 00 |
| TF4M0060 | Transducer: 4MHz Standard Shear Wave; 60° – 10mm Dia – Lemo 00 |
| TF4M0070 | Transducer: 4MHz Standard Shear Wave; 70° – 10mm Dia – Lemo 00 |
| N-104-0000 | Transducer Cable: 1.2m (4′) Single Lemo 00 to Lemo 00 |
| TF5M00F | 5MHz Dual 0° Focused (weld inspection lamination checks) – 10mm Dia – Lemo 00 |
| TL-31897-60 | Transducer Cable: 60″ (5′) Lemo 00 to Lemo 00 |
COUPLANT ULTRASONICO
| Part Number | Description |
|---|---|
| T92015701 | Ultrasonic Couplant, 120ml/4fl oz |
| T92015701-5 | Ultrasonic Couplant, 120ml/4fl oz, Pack of 5 Bottles |
| T92024034-7 | Ultrasonic Couplant, 300ml (10fl oz) |
| T92024034-8 | Ultrasonic Couplant, 500ml (17fl oz) |
COUPLANT ULTRASONICO – HI-TEMP
| Part Number | Description |
|---|---|
| T92024034-9 | Ultrasonic Couplant – Hi-Temp (370°C/700°F); 60ml (2fl oz) |
| T92024034-10 | Ultrasonic Couplant – Hi-Temp (370°C/700°F); 60ml (2fl oz), Pack of 2 |
Further information and contacts
Systems division and sensor integration partner : www.roder.it
More information about RODER SRL : about us
Contact for general information : info@roder.it
Contact for information about these products : info@roder.it
The information contained on this web page is provided for information purposes only. Although it has been compiled with the utmost care, it does not constitute a contractual offer or a binding commitment to supply. It may contain transcription, translation or typographical errors. For precise and up-to-date information, please contact our company directly.
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