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The Dakota FX71-DL Flaw Detector (DFX-7), part number Z-221-0005, is a handheld instrument that combines ultrasonic flaw detection with material thickness measurement in one device. It works as a thickness gauge, able to measure coating and material thickness at the same time, and as a flaw detector that identifies the size, position and type of flaws in materials and welded joints. Combining both functions in one unit means an inspector can check wall thickness and screen for internal defects on site without carrying separate gauges.
It sends ultrasonic pulses into the part and analyses the returning echoes, offering detection by Z-Cross, Flank and Peak and sizing toolkits including DAC, AWS, TCG and DGS. Pulse repetition frequency is adjustable from 8 to 2000Hz. Thickness measurement spans multiple modes, from pulse-echo 0.63 to 2,440mm through to echo-echo through-paint and coating-only modes from 0.0127mm, with resolution selectable at 0.01mm or 0.001mm. Gain offers a 110dB range with 0.2dB resolution, and probe zero, probe recognition and temperature compensation are automatic.
The colour VGA AMOLED display (320 x 240 pixels) gives strong visibility in sunlight. Up to 4GB of readings can be stored in sequential or grid format with alphanumeric identifiers and downloaded to DakMaster data management software over USB-C. The Dakota FX71-DL Flaw Detector conforms to NIST, MIL-STD-45662A and the European flaw detector standard EN12668-1. Supplied by BAMR, South Africa's authorised distributor.
Dakota FX71-DL Flaw Detector (DFX-7)
The Dakota FX71-DL Flaw Detector is a versatile handheld device combining advanced flaw detection and material thickness measurement. It functions as both a thickness gauge, capable of measuring coatings and material thickness simultaneously, and a flaw detector, identifying the size, position, and type of flaws in materials and welded joints.
- Exceptional visibility in sunlight (AMOLED)
- Colour VGA display 320×240 pixels
- Sizing Toolkits DAC, AWS, TCG, DGS
- Pulse Repetition Frequency 8 to 2000Hz, adjustable
- Detection Z-Cross, Flank & Peak
- Automatic probe zero, probe recognition, and temperature compensation
- Measurement Variety of modes to address a number of applications
- Large data storage with multiple formats Alpha numeric grid and sequential with auto identifier
- Download to DakMaster data management software
When to use the Dakota FX71-DL Flaw Detector
Reach for the FX71-DL when you need one handheld device to both find flaws in welds and material and measure thickness in the field. It combines flaw detection that identifies the size, position and type of defect with simultaneous coating and material thickness measurement, which suits inspectors moving between weld checks and corrosion surveys on site.
- 1Flaw sizing toolkits on boardDAC, AWS, TCG and DGS sizing modes mean you can evaluate weld and material defects against the method your job or code calls for without a second instrument.
- 2Readable in direct sunlightThe AMOLED colour VGA display stays visible outdoors, so field inspections on structures and pipework do not stall when you step into bright conditions.
- 3Measures through coatingsEcho Echo ThruPaint and coating thickness modes let you read material thickness without stripping paint, saving time on coated assets where the substrate is what matters.
- 4Large logging with auto identifiers4GB memory with alpha numeric grid and sequential logging plus OBSTRUCT marking keeps a traceable record and flags inaccessible points for later follow-up.
Lower-budget alternatives
Ten minutes on a call with one of our specialists usually saves you from buying the wrong instrument.
Book a 10-minute callOr , our product assistant, for an instant answer.
When to use this
When to use the Dakota FX71-DL Flaw Detector
Reach for the FX71-DL when you need one handheld device to both find flaws in welds and material and measure thickness in the field. It combines flaw detection that identifies the size, position and type of defect with simultaneous coating and material thickness measurement, which suits inspectors moving between weld checks and corrosion surveys on site.
- 1Flaw sizing toolkits on boardDAC, AWS, TCG and DGS sizing modes mean you can evaluate weld and material defects against the method your job or code calls for without a second instrument.
- 2Readable in direct sunlightThe AMOLED colour VGA display stays visible outdoors, so field inspections on structures and pipework do not stall when you step into bright conditions.
- 3Measures through coatingsEcho Echo ThruPaint and coating thickness modes let you read material thickness without stripping paint, saving time on coated assets where the substrate is what matters.
- 4Large logging with auto identifiers4GB memory with alpha numeric grid and sequential logging plus OBSTRUCT marking keeps a traceable record and flags inaccessible points for later follow-up.
Lower-budget alternatives
Ten minutes on a call with one of our specialists usually saves you from buying the wrong instrument.
Book a 10-minute callOr , our product assistant, for an instant answer.
Specifications
Technical Specifications
| Part Number | Description | Certificate |
|---|---|---|
| Z-221-0005 | Dakota FX71-DL Flaw Detector (DFX-7+) | ● |
| Operating Temperature | -10 to 60ºC | |
| Power Supply | 3 x AA batteries and via USB | |
| Battery Life 2 | Alkaline (12hrs), Nicad (5hrs), and NI-MH (12hrs) | |
| Gauge Weight | 397g – including batteries | |
| Gauge Dimensions | 63.5 x 165 x 31.5mm |
- Model
- FX71-DL
- Material thickness digits display
- Yes
- B-Scan cross-sectional display
- Yes
- B-Scan with digits display
- Yes
- Scan bar display
- Yes
- Coating thickness display
- Yes
- A-Scan display
- + Rectified, - Rectified, Full Waveform (RF)
- Flaw Detection Modes
- TRIG, DAC, AWS, TCG, AVG/DGS
- Measurement Range
- Pulse Echo (PE) 0.63 - 2,440mm; Pulse Echo (single contact) 1.0 - 30,480mm; Echo Echo ThruPaint (EE) 1.27 - 102mm; Echo Echo (single delay line) 0.178 - 25.4mm; Echo Echo (single contact) 1.0 - 3,050mm; Echo Echo Verify (EEV) 1.27 - 25.4mm; Pulse Echo Temp Comp (PETP) 0.63 - 2,440mm; Coating Thickness (CT) 0.0127 - 2.54mm; Pulse Echo Coating Thickness (PECT) 0.01 - 2.54mm; Pulse Echo Coating Thickness (PECT) 0.63 - 2.440mm
- Resolution
- 0.01mm, 0.001mm selectable
- Manual measurement rate
- 8 readings per second
- Scan Mode measurement rate
- 50 readings per second
- Scan bar display measurement rate
- 10 readings per second
- High Speed Scan Mode
- Yes
- Differential Mode
- Yes
- Limit alarm mode
- Yes
- B-Scan display speed
- Adjustable display speed
- Calibration setups
- 64 user-definable setups transferrable to and from a PC archive
- Gates
- 2 (flaw) and 3 (thickness) adjustable gates: start, stop, width & threshold
- Damping
- 50, 75, 100, 300, 600, & 1500 ohms
- Pulser type
- Two adjustable square wave pulsers and receivers
- Gain
- Manual, automatic gain control (AGC) with 110dB range with 0.2dB resolution
- Timing
- Precision TCXO timing with single shot 100 MHz 8 bit ultra-low power digitizer
- Memory and Data Logging
- 4GB internal memory; Sequential and grid logging; Alpha numeric batch identification; OBSTRUCT indicates inaccessible locations; Bitmap graphic capture and capture viewer
- Data Output
- USB-C
- Calibration Options
- Single, two point, velocity, material type
- Transducer recognition
- Automatic
- V-path / dual path error correction
- Automatic
- Probe Zero
- Automatic
- Automatic Calibration
- Longitudinal (straight), or Shear (angle)
- Display
- 1/4 VGA AMOLED colour display 57.6 x 43.2mm viewable area
- Display Refresh Rate
- 60Hz
- Units (selectable)
- mm
- Backlight
- Adjustable brightness
- Repeatability / Stability Indicator
- Yes
- Low Battery Indicator
- Yes
- Battery Save Mode
- Auto
- Probe Types
- Single Contact, Dual, Delay & Angle
- Material Velocity Table
- Contains longitudinal and shear velocities for a variety of material types
- TRIG
- Trigonometric display of beam path, depth, surface distance, and curved surface correction. Used with angle beam transducers
- DAC
- Up to 8 points may be entered and used to digitally draw a DAC curve. Reference -2, -6, -10, (-6/-12), (-6/-14), (-2/-6/-10) dB. Amplitude displayed in %DAC, dB, or %FSH
- AWS
- Automatic defect sizing in accordance with AWS D1.1 structural welding code
- AVG/DGS
- Automatic defect sizing using probe data. Stores up to 64 custom setups
- TCG
- Time corrected gain. 50 dB dynamic range, 20 dB per microsecond, up to 8 points for curve definition
- Detection Modes
- Zero Crossing, Flank and Peak
- Display Freeze
- Hold current waveform on screen
- Peak Memory
- Captures peak signal amplitude
- PRF
- 8 to 2000Hz in selectable steps (8, 16, 32, 66, 125, 250, 333, 1000, 2000Hz)
- Skip Bar
- Displays skip legs in the waveform area
- Pulse Width
- 40 to 400 ns. Selectable step options 40, 80 & 400 ns (labeled spike, thin & wide)
- Frequency Bands
- FX70-DL & FX71-DL: Broadband 1.8 - 19MHz; FX71-DL: Three narrow bands at 2MHz, 5MHz, 10MHz
- Horizontal Linearity
- +/- 0.4% FSW
- Vertical Linearity
- +/- 1% FSH
- Amplifier Linearity
- +/- 1 dB
- Amplitude Measurement
- 0 to 100% FSH, with 1% resolution
- Delay
- 0 - 999in (25,375mm) at steel velocity
- Battery Life
- Alkaline (12hrs), Nicad (5hrs), and NI-MH (12hrs)
What's in the kit
What's in the kit
Standards
Standards
Downloads
Frequently asked questions
What are the two primary functions of the Dakota FX71-DL?
It functions as both a thickness gauge, capable of measuring coating and material thickness simultaneously, and a flaw detector, identifying the size, position, and type of flaws in materials and welded joints.
Which flaw detection modes does the FX71-DL support?
The instrument supports TRIG, DAC, AWS, TCG, and AVG/DGS flaw detection modes, covering trigonometric beam path display, DAC curve drawing, AWS D1.1 structural welding sizing, time corrected gain, and automatic defect sizing.
What measurement modes and ranges does the FX71-DL cover?
Modes include Pulse Echo (0.63 to 2,440mm), Pulse Echo single contact (1.0 to 30,480mm), Echo-Echo ThruPaint (1.27 to 102mm), Echo-Echo Verify (1.27 to 25.4mm), Coating Thickness (0.0127 to 2.54mm), and Pulse Echo Coating Thickness (0.01 to 2.54mm).
How many calibration setups can be stored on the FX71-DL?
The instrument holds 64 user-definable setups, which can be transferred to and from a PC archive.
How is the FX71-DL powered and what is its battery life?
It runs on 3 x AA batteries or via USB. Battery life is approximately 12 hours with alkaline or NI-MH batteries and 5 hours with NiCad batteries.
What data logging features does the FX71-DL provide?
It includes 4GB internal memory with sequential and grid logging, alphanumeric batch identification, OBSTRUCT notation for inaccessible locations, and bitmap graphic capture with an on-gauge capture viewer.
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