The USN 60 flaw detector series has been optimized for use in direct sunlight and operation at extreme temperatures. These new characteristics make the instruments ideally suited for outdoor use with its increased long battery operation time.


Depending on the applications challenges, you have the choice between the USN 60 and the USN 60L version.



new Outstanding ultrasonic performance

The combination of the rugged USN durability, 11 hours of battery operation, fast rotary knob operation, outstanding ultrasonic performance, and the "square wave pulser" form powerful portable ultrasonic inspection tool.


new Optimized outdoor use design

The USN 60 / USN60L flaw detectors are especially designed to be used outdoors:

  • Extreme temperature use
    (-20°C to +55°C /-4°F to 130°F)
  • Easy to view in direct sunlight
  • 11 hours battery operation


new Vibrant colors

  • Hi-resolution color LCD display produces “Analog Look and Performance” echo dynamics.
  • 4 selectable vibrant display color schemes to match lighting conditions.
  • Gates and gate functions are color coded for easy identification and fast adjustment.


          Outdoor use screenshot web


User preferred features:

  • Simple operation with fast rotary knob adjustments; gain is always directly accessible with the left-hand rotary knob and lockable.
  • Auto CAL makes calibration fast & easy.
  • 15 Hz to 6 kHz (spike mode) PRF and 15 Hz to 2 kHz (square mode) PRF (pulse repetition frequency).
  • 2 independent gates monitor amplitude and sound path distance for both flaw detection and thickness measurement applications.
  • 250 KHz to 25 MHz frequency range.
  • RF display mode enhances signal evaluation and bond inspection of dissimilar materials.
  • 4 selectable damping settings (50, 75, 150, 500 ohms) for optimum probe performance.
  • 1 mm to 28 m (0.040” to 1100”) range (in steel) covers thin to lengthy acoustically clean materials.
  • dB REF key evaluates subsequent echoes gain value and amplitude against the highest echo in Gate A (reference echo) when activated.
  • IF (Interface) Gate Option for automatic start of the display, Gate A, Gate B, and / or DAC / TCG for immersion testing applications.
  • VGA Output Option provides an easy way to connect
    to a PC monitor or PC projector for viewing by large audiences or training purposes.
  • RF Output Option outputs the raw RF waveform via a standard Lemo connector for further analysis.
  • BEA (Backwall Echo Attenuator) Option allows independent gain control of the region under Gate B for backwall echo monitoring.
  • 19" Rack Mount Model.

Wide range of applications

A 6 kHz pulse repetition frequency, real-time analog and TTL outputs makes the USN 60 flaw detectors series ideal for a wide range of automated systems testing applications.

The exclusive SmartView feature displays even the shortest echoes for critical scanning and rotating part inspections. The quality, durability, dependability and ease of use that you have come to expect of Krautkramer’s popular USN Series of instruments remains. From rugged field inspections to high resolution thin measurements, long acoustically clean materials, and immersion systems, the USN 60 flaw detector family extends the range of applications that a portable instrument can perform.

Furthermore the selectable 450V Square Wave Pulser satisfies a wide range of tough-to penetrate applications, such as difficult to penetrate metallic applications and especially non-metals inspection like composite materials.

Weld Inspection

Square wave pulser with tunable pulse width solves composite testing applications.


Tools for easy weld inspection

  • Color Leg allows easy identification of leg and skip distances for weld inspection.
  • GRID mode dynamically changes bands of display background colors for each leg.
  • A-SCAN mode dynamically changes the color for each leg of the "live" A-Scan.


      Color leg screenshot web

"Color Leg" indicator displays the legs of the angle beam inspection in different colors


  • Weld Rating Calculation simplifies the rating of weld indications according to AWS Specification D1.1. (Formula D = A – B – C).
  • Trigonometric flaw location function with curvature correction automatically calculates depth, surface distance, and sound path to flaw along with the leg of the inspection when using angle beam probes. All TOF measurements can be displayed in mm, inches or µs.
  • SmartView function along with variable persistence freeze modes displays the most important information (relevant shot) for a test.
  • Real time (single shot) analog and TTL outputs handle a wide range of automated systems applications.
  • Choose from Four Freeze Modes: ALL, Peak Std, Compare or Envelope for optimum waveform evaluation and comparison.
  • Three Variable Persistence Modes are selectable in Freeze Envelope to visually assist flaw detection & evaluation for scanning and moving part inspections.
  • Compare frozen reference wave-forms to live A-Scans in different colors to easily interpret test results.

Tools for easy defect sizing

  • 40 dB dynamic DAC/TCG Option corrects for distance/ amplitude variations from material loss and beam spread with ability to edit or insert recorded echoes individually. Up to four DAC curves can be drawn on the screen at one time to show +/- dB curves in addition to the originally recorded DAC curve.


          DAC screenshot web


  • DGS (Distance Gain Size) Option displays a curve for a particular equivalent reflector size. The ERS (Equivalent reflector size) function automatically calculates the corresponding equivalent reflector diameter in mm or inches for any echo in the measurement gate.


          DGS screenshot


Range USN 60 0.040" to 1100" (1 mm to 28 m) at steel velocity;
range selectable in fixed steps or continuously
 Range USN 60L range is 0.040" to 480" (1 mm to 12 m)
Material Velocity
Continuously adjustable from 0.0098 to
0.6299 inches/μs (250 to 16,000 m/s);
65 selectable material velocities
Display Delay -20 to 3498 μs in steel (dependent on range)
Probe Delay/
Zero Offset
0 to 999.9 µs
Damping 50, 75, 150, 500 ohms
Gain 0 to 110 dB adjustable in selectable steps 0.1, 0.5,
1.0, 2.0, 6.0, user definable, and locked
Test Modes Pulse echo, dual, and thru-transmission
Pulser Square wave excitation pulse
Pulse Voltage
(Square wave pulser
50 to 450 V scrollable in 10 V adjustments
Pulse Width (Square
wave pulser mode)
Tunable from 50 to 1000 ns in 10 ns adjustments
Pulse Energy
(Spike mode)
Low, High
Pulse Repetition
Frequency USN 60
Autolow, autohigh, manually adjustable from 15 to
6000 Hz (spike mode) and 15 to 2000 Hz in square
wave mode, in 5 Hz increments, external trigger
(spike mode only)
Pulse Repetition
Frequency USN 60L
Limited to 2000 Hz in both spike and square wave
(amplifier bandpass)
0.25 to 25 MHz with 10 selectable settings including
Gate Monitors Two independent flaw gates controllable over entire
sweep range
Measurement Modes Zero-to-first, multi-echo with selectable flank or
peak detection
Rectification Positive halfwave, negative halfwave, fullwave, RF
Reject (suppression) 0 to 80% linear
Units Inch, millimeter, or microsecond selectable
-20º to 55ºC (-4º to 130ºF);
-25º to 70ºC (-13º to 158ºF ) storable
Languages Selectable English, German, French, Spanish, Italian,
Portuguese, Norwegian, Swedish, Finnish, Danish,
Dutch, Russian, Czech, Romanian, Slovakian
Probe Connectors BNC or Lemo selectable at order
Keypad International symbols
Battery Power Lithium Ion battery pack;
NiMH, NiCad or alkaline cells substitutable
Battery Life 11 hours on Li-Ion battery pack
Size 11.1” W x 6.75” H x 6.25” D (282 x 171 x 159 mm)
Display 640 x 480 pixels color LCD
132.48 x 99.36 mm
Weight 6.6 lbs. (3.0 kg) Li-Ion battery;
3.5 lbs.(1.6 kg) without battery
Color Leg Easy identification of leg and skip distances for
angle beam inspection in A-scan or grid
background colors
Weld Rating
Simplifies the rating of weld indications according
to AWS specification D1.1, (formula D=A-B-C)
Warranty 2 year conditional warranty on parts and labor;
free 2nd year contingent upon return of unit within
13 months of purchase for recertification
Dust Proof/
DrippingWater Proof
As per IEC 529 specification for IP54 classification
Compliance EMC/EMI: EN 55011:2007, EN 61000-6-2:2005
Ultrasound: EN 12668, ASTM E317



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USN 60 Specification Sheet USN 60 Specification Sheet USN 60 Specification Sheet USN 60 Specification Sheet
USN 60/60L brochure USN 60/60L brochure


Range USN 60L