DFX-7 Series Flaw Detector


Size: 2.5W x 6.5H x 1.24D in (63.5 x 165 x 31.5mm).

Weight: 14 ounces (.397kgs), with batteries.

Case: Extruded aluminum body with nickel plated aluminum end caps (gasket sealed).

Display: 1/4 VGA AMOLED color display (320 x 240 pixels). Viewable area 1.7 x 2.27 in (43.2 x 57.6 mm). 16 color pallete, multiple color options, and variable brightness.

Screen Refresh Rate: Selectable 60 or 120Hz.

Display Views: Flaw Detector: Full wave, +/- Rectified, or RF. Thickness Gauge: Digits, +/- Rectified, RF, or B-Scan.

Timing: Precision 25MHz TCXO with single shot 100 MHz 8 bit ultra low power digitizer.

Measurement Gates: Two independent gates (Flaw), and three gates (thickness). Start & width adjustable over full range. Amplitude 5-95%, 1% steps. Positive or negative triggering for each gate with audible and visual alarms.

Operating Temperature: 14 to 140F (-10C to 60C).

Environmental: Meets IP65 requirements.


Automatic Calibration: Longitudinal (straight), or Shear (angle).

Probe Types: Single Contact, Dual, Delay, and Angle .

Units: English (in), Metric (mm), or Time (μs).

Velocity: 0.0100 to .6300 in/μs (256–16,000 m/s).

Test Range: 0 to 0.280in (7.11mm) minimum, to 1200in (30,480mm) maximum at steel velocity. Continuously variable.

Zero Offset (Probe Zero): 0–999.999 μs.

Material Velocity Table: Contains longitudinal and shear velocities for a variety of material types.


Pulser Type: Two adjustable square wave pulsers and receivers.

P.R.F.: 8 to 333Hz in selectable steps (8, 16, 32, 66, 125, 250, 333Hz).

Pulser Voltage: 200 volt peak amplitude, rise/fall time < 10ns into 50ohm. Pulse Width: 40 to 400 ns. Selectable step options 40, 80 & 400 ns (labeled spike, thin & wide).


Gain: 0 to 110dB with 0.2dB resolution. Manual and AGC control.

Damping: 50, 75, 100, 300, 600, & 1500 ohms. Frequency Bands: DFX-7 & 7+: Broadband 1.8 –

19 MHz (-3dB). DFX-7+: 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.

Flaw Detector Features

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.

Measurement Mode: Pulse-Echo (P-E) measures from 0.025 in to 100 ft. (0.63mm to 3048 cm).

Auto-Cal: Provides automatic calibration with two reference points.

Detection Modes: Zero Crossing, Flank and Peak.

Display Freeze: Hold current waveform on screen.

Peak Memory: Captures peak signal amplitude.


Log Formats: Grid (Alpha Numeric), or Sequential (Auto Identifier).

Graphics On: 8,000 readings, A/B Scan image, & all gauge settings for every reading.

Graphics Off: 210,000 readings (coating, material, min & max. (Thickness gauge only).

Custom Setups: 64 user configurations. Power Source

Battery: Three 1.5V alkaline, 1.2V AA Nicad cells, 1.2V AA NI-MH, or other other equivalent power source. Battery life (continuous use): Alkaline (12 hrs), Nicad (5hrs), and NI-MH (12hrs), with default settings.

Click for DFX 7 Series data brochure


Made in the USA