NM01Z2510003
FX81-DL (Former DFX-8+) FLAW DETECTOR / THICKNESS GAUGE, DAKOTA NDT Includes: Line Power Adaptor, Universal Power Cable, Carrying Case, 4 oz Couplant, Operating Manual, DakView3 PC software & USB Cable, Calibration Certificate, Lemo 00 Connectors SKU: Z-251-0003
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Dakota NDT FX81-DL (Formerly DFX-8+) Benchtop Flaw Detector and Thickness Gauge
SKU: Z-251-0003
A benchtop ultrasonic flaw detector and advanced thickness gauge with 400 V tone-burst pulsers, six narrow-band filters and up to 64 GB of data storage, made for laboratory inspection.
| 400 VTone-burst pulsers | 6Narrow-band filters | 64 GBMemory card support | 18 hLi-ion battery life |
The Dakota NDT FX81-DL, formerly the DFX-8+, is a benchtop ultrasonic instrument that combines state-of-the-art flaw detection with advanced material thickness capabilities. Designed for the laboratory and made in the USA, it pairs two 100 to 400 V tone-burst pulsers with a 1.8 to 19 MHz broadband filter and six narrow bands for precise control on difficult materials.
DAC, AWS, TCG and AVG/DGS sizing toolkits come standard, and time corrected gain automatically compensates for sound attenuation through the material. A 4 GB internal memory, a memory card slot for up to 64 GB, B-scan encoder support and an automatic interface gate for immersion testing make it ready for detailed, documented inspections.
Key Features
 | Two benchtop instruments in oneSwitch between a full-featured flaw detector and an advanced thickness gauge on the same unit. Automatic probe zero, probe recognition and temperature compensation speed up setup in thickness mode, while TCG keeps flaw sensitivity consistent at every depth. |
Broadband plus six narrow bandsA 1.8 to 19 MHz broadband filter is joined by six narrow bands at 0.5, 1, 2, 5, 10 and 15 MHz. Combined with two 100 to 400 V tone-burst pulsers and six damping settings, this gives fine control over penetration and resolution across a wide range of materials. |  |
Built for the Lab
Complete sizing toolkits
DAC with up to 8 points and preset reference curves, AWS D1.1 automatic defect sizing, TCG with a 50 dB dynamic range and AVG/DGS sizing from probe data all come standard, with Zero-Cross, Flank and Peak detection.
Encoder, immersion and automation ready
Connect B-scan encoders and crawlers, use two alarm outputs and a 0 to 10 V proportional analog output for external systems, and let the automatic interface gate track the water path in immersion testing. Remote Commander PC software adds remote display and control for training or system integration.
Advanced thickness modes
Pulse-echo, pulse-echo coating, temperature-compensated, echo-echo thru-paint, echo-echo verify and coating-only modes cover pits, flaws, coatings and coated surfaces. High-speed scan captures up to 50 readings per second.
Massive data storage
Log readings to 4 GB of internal memory or a memory card of up to 64 GB, in alphanumeric grid or sequential formats, with bitmap screen capture and 64 custom setups. Mark inaccessible grid locations as OBSTRUCT, then transfer data to DakMaster software.
Large sunlight-readable display
The 5.7" Blanview QVGA TFT color display (320 × 240) stays readable in bright light, with a 16-color palette, variable brightness and a 60 Hz refresh rate, in a gasket-sealed case that meets IP65.
Double-shift power
The Li-ion battery pack runs for a typical 18 hours, with emergency backup from 6 AA batteries. In the lab, the included line power adaptor keeps it running without limits.
Specifications
| General | |
| Manufacturer | Dakota NDT |
|---|---|
| Model | FX81-DL (formerly DFX-8+) |
| SKU | Z-251-0003 |
| Instrument type | Benchtop ultrasonic flaw detector and thickness gauge |
| Transducer connectors | Two Lemo 00 |
| Warranty | 2-year limited |
| Shipping dimensions (estimated) | 457 × 356 × 229 mm (18.0 × 14.0 × 9.0 in) |
| Shipping weight (estimated) | 5.4 kg (12 lb) |
| Pulser | |
| Pulser type | Two tone-burst pulsers |
| Pulser voltage | 100 to 400 V |
| Pulse width | 40 to 400 ns (spike, thin and wide settings) |
| PRF | 8 to 2,000 Hz in selectable steps (8, 16, 32, 66, 125, 250, 333, 1,000, 2,000 Hz) |
| Receiver | |
| Gain | 0 to 110 dB with 0.2 dB resolution; manual and AGC |
| Damping | 50, 75, 100, 300, 600 and 1,500 Ω |
| Frequency bands | Broadband 1.8 to 19 MHz (-3 dB); narrow bands at 0.5, 1, 2, 5, 10 and 15 MHz |
| Linearity | Horizontal ±0.4% FSW; vertical ±1% FSH; amplifier ±1 dB |
| Timing | Precision TCXO, single shot, 100 MHz 8-bit digitizer |
| Flaw Detector | |
| Sizing toolkits | DAC (up to 8 points), AWS D1.1, TCG (50 dB dynamic range, up to 8 points), AVG/DGS |
| Trigonometry | TRIG: beam path, depth, surface distance and curved surface correction |
| Detection | Zero-Cross, Flank and Peak |
| Gates | 2 independent gates with audible and visual alarms; automatic interface gate for immersion |
| Other tools | Auto-Cal, display freeze, peak memory |
| Thickness Gauge | |
| Pulse-echo (P-E) | Pits and flaws, 0.025 in to 100 ft (0.63 mm to 30.48 m) |
| Pulse-echo coating (PECT) | Material 0.025 in to 100 ft; coating 0.001 to 0.100 in (0.01 to 2.54 mm) |
| Temperature compensated (PETP) | Pits and flaws with automatic temperature compensation, 0.025 in to 100 ft |
| Echo-echo (E-E) | Thru paint and coatings, 0.050 to 4.0 in (1.27 to 102 mm) |
| Echo-echo verify (E-EV) | Thru paint and coatings, 0.050 to 1.0 in (1.27 to 25.4 mm) |
| Coating only (CT) | 0.0005 to 0.100 in (0.0127 to 2.54 mm) |
| Resolution | Selectable: 0.001 in (0.01 mm) or 0.0001 in (0.001 mm) |
| Gates | 3 |
| Other features | High-speed scan up to 50 readings per second; hi/lo alarm; differential mode |
| Calibration | |
| Automatic calibration | Longitudinal (straight) or shear (angle) |
| Probe types | Single contact, dual, delay line and angle |
| Velocity range | 0.0100 to 0.6300 in/µs (256 to 16,000 m/s), with material velocity table |
| Test range | 0.076 in (1.93 mm) minimum to 1,200 in (30,480 mm) maximum at steel velocity |
| Zero offset | 0 to 999.999 µs |
| Display, Memory & Connections | |
| Display | Blanview sunlight-readable QVGA TFT color, 320 × 240 pixels, 5.7" (144.78 mm) diagonal, 16-color palette |
| Refresh rate | 60 Hz |
| Memory | 4 GB internal, plus up to 64 GB external |
| Log formats | Alphanumeric grid or sequential with auto identifier; bitmap screen capture; 64 custom setups |
| USB | Direct USB 1.1 PC connectivity |
| 5-pin Lemo | RS232 output, B-scan encoder input, two alarm outputs, 0 to 10 V proportional analog output |
| Remote software | Remote Commander PC software for remote display and control |
| Physical & Power | |
| Dimensions (W × H × D) | 216 × 165 × 70 mm (8.5 × 6.5 × 2.5 in) |
| Weight | 2.04 kg (4.5 lb) with batteries |
| Case | Extruded aluminum body, nickel-plated aluminum end caps, gasket sealed |
| Environmental | Meets IP65 |
| Battery | Li-ion pack, 10.8 V, 2 Ah, typical 18 hours; emergency backup with 6 AA cells (alkaline 12 h, NiMH 12 h, NiCd 5 h) |
| Line power | 12 V, 2 A adaptor, 100 to 240 V AC, 50 to 60 Hz |
| Operating temperature | -10°C to 60°C (14°F to 140°F) |
| Standards | |
| Flaw detector | EN ISO 22232-1 compliant (formerly EN 12668-1) |
| Thickness gauge | Factory calibration traceable to NIST and MIL-STD-45662A |
What's in the Box
- Dakota NDT FX81-DL benchtop flaw detector and thickness gauge
- Line power adaptor and universal power cable
- Carrying case
- 4 oz couplant
- Operating manual
- DakView3 PC software and USB cable
- Certificate of calibration
- Lemo 00 connectors
Contents can vary by package, so contact us to confirm what ships with your order.
Complete your setup
Transducers are sold separately. Add Dakota contact, dual, delay line, pencil or angle beam transducers with matching Lemo 00 cables and wedges, plus a calibration block for daily checks.
Applications
The FX81-DL is built for laboratory and bench inspection of welds, forgings and structural components.
| ✓ Weld inspection | ✓ Structural welds to AWS D1.1 |
| ✓ Forgings | ✓ Turbines |
| ✓ Immersion testing | ✓ Encoded B-scan with crawlers |
| ✓ Corrosion and thickness measurement | ✓ Laboratory QA/QC and training |
Downloads
| ⬇ FX81-DL Datasheet (PDF) | ⬇ FX80 Series Full Specifications (PDF) |
About Dakota NDT
Dakota NDT, an Elcometer company, manufactures high-quality industrial ultrasonic testing equipment for the petrochemical, aerospace, power generation and automotive industries. Its range includes corrosion and precision thickness gauges, flaw detectors, bolt tension monitors, transducers and accessories.
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