Structural Flaw Detectors

GAO’s structural flaw detectors are devices used to identify defects or flaws in materials, structures, or components. They are primarily used in non-destructive testing (NDT) techniques, which involve testing materials or structures without damaging or altering them. There are various types of structural flaw detectors available, including ultrasonic, radiographic, magnetic particle, liquid penetrant, eddy current, and visual inspection methods. Each type of detector is used to identify different types of flaws, such as cracks, porosity, inclusions, and surface defects. Ultrasonic flaw detectors, for example, use high-frequency sound waves to identify internal flaws in materials, while radiographic flaw detectors use X-rays or gamma rays to penetrate materials and identify flaws.


GAO’s structural flaw detectors are composed of sensor, signal processor, display unit, power source, and data storage.

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GAO’s structural flaw detectors have the following functions:

  • Non-destructive testing: Our structural flaw detectors are used for non-destructive testing, which allows the inspection of a structure without causing any damage to it. This can be important for assessing the safety and integrity of structures without requiring costly repairs or replacements.
  • Identification of defects: GAO’s structural flaw detectors can identify a range of defects, including cracks, voids, and corrosion, which can compromise the strength and safety of a structure.
  • Location of defects: Our flaw detectors can accurately locate defects, which allows for targeted repair and maintenance.
  • Monitoring of changes: GAO’s flaw detectors can also be used for monitoring changes in structures over time, such as the growth of cracks or the expansion of voids. This can help identify potential problems before they become serious.
  • Quality control: Our structural flaw detectors can be used in quality control processes to ensure that structures are built to the required standards and specifications.

GAO’s structural flaw detectors are rugged, portable, versatile and precision measurement instruments. They comply with applicable industry standards such as ASTM E1444, ASTM E164, ASTM E543, ISO 5577, ISO 3452, and EN 12668.

Our structural flaw detectors help our customers comply with relevant U.S. government regulations such as:

  • Occupational Safety and Health Administration (OSHA)
  • Federal Aviation Administration (FAA)
  • American Society of Mechanical Engineers (ASME)
  • National Institute of Standards and Technology (NIST) technology
  • Federal Railroad Administration (FRA)

Our structural flaw detectors help our customers comply with relevant Canadian government regulations such as:

  • Canadian Centre for Occupational Health and Safety (CCOHS)
  • Canadian General Standards Board (CGSB)
  • Natural Resources Canada


GAO’s structural flaw detectors have the following applications:

  • Construction: Our structural flaw detectors are used in the construction industry for quality control, to detect defects in new structures, and ensure they meet the required safety and regulatory standards.
  • Maintenance and inspection: Our flaw detectors are used for regular inspections of structures, such as bridges, buildings, and pipelines, to identify defects or damage that may require repair or replacement.
  • Automotive industry: GAO’s flaw detectors are used in the automotive industry to inspect and detect defects in parts such as engines, chassis, and bodywork.
  • Manufacturing industry: Our structural flaw detectors are used in the manufacturing industry for quality control and to detect defects in products, such as metal castings, plastic molds, and composite materials.
  • Oil and gas industry: GAO’s flaw detectors are used in the oil and gas industry to inspect pipelines and other infrastructure for cracks, corrosion, and other defects that can lead to leaks or failures.

Our structural flaw detectors can be shipped overnight within the continental U.S. and Canada, and can be shipped globally.

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ID: GT00XY00Z7

This portable industrial Flaw Detector with Li Battery (100 Independent Set up) is used to diagnose defects such as crack, inclusion and pinholes in a workpiece and can be used continuously up to 8 hours.
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This Flaw Detector with Signal Processing (Varied Pulser Function) is designed to test thin materials using spike pulser with low, middle and high choices of pulse energy upto 1000 Hz frequency.
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This ‘Flaw Detector with 100 Independent Setup (3 Staff Gauge)’ is used to rapidly inspect, locate, evaluate and diagnose various defects in a work piece without destruction and has automated switch with 3 staff gauge.
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ID: GT00XY00Z1

This Ultrasonic Flaw Detector (Narrowband and Broadband Filter) is designed to resist the severe environment and it features an adjustable echo signal filter in which each individual advantage of narrowband and broadband can be achieved.
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This Ultrasonic Flaw Detector with DAC Curve (Warning Function) is designed to resist the severe environment by warning function in the form of an afferent echo/lost wave alarm.
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This portable Ultrasonic Flaw Detector with Display Freeze Echo Function is designed for harsh environment and its display freeze feature catches waveform and sound path data to measure the echo-wave parameters.
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This Solid Density Meter with Standard Accessories (Alarm) is designed to easily and precisely determine the density of materials in the range from 0.0001 g/cm3 to 99.9999 g/cm3.
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This Ultrasonic Flaw Detector (Real-time Clock, Display Freeze) is designed for the hostile site environment and can be used to locate the flaws from the solid waveform display with data storage of up to 1000 data sets.
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ID: GT00XY00Z2

This Flaw Detector with Two Detection Methods(Free Switching) is designed to locate, evaluate and diagnose various defects using ultrasonic wave with a frequency range from 0.5MHz to 20MHz and can be used both in field and lab.
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This Flaw Detector with 32 Flaw Detect Channel (Low-Power) is designed using various flaw detection technology and standards which operates in the speed range from 400 m/s ~ 20000 m/s.
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This Flaw Detector with Automated Calibration (Metal Housing) is designed to locate, evaluate and diagnose various defects with scanning range of 0 inches to 393.70 inches (0 mm to 10000 mm).
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ID: GT00XY00Z9

This Flaw Detector with Auto Calibration (Spheroidization Rate) is a high speed flaw detector to locate, evaluate, and diagnose various defects with 28 DGS curves.
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ID: GT00XY00Z3

This portable Flaw Detector with Transducer Calibration (Li Battery) can quickly, and accurately inspect and evaluate flaw location for a range of scanning up to 393.7 in (10000 mm) and diagnose various defects in a workpiece.
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ID: GT00XY00Z5

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This portable Flaw Detector with Automatic Calibration (3 Switch Gauge) can accurately inspect and diagnose various defects (crack, inclusion and pinhole, etc.) in a work piece and comes with an automated 3 switch gauge for measuring depth, level and distance.
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ID: GT00XY00Z4

This Flaw Detector with 3 Switch Gauge (Gate and DAC Alarm) Depth d, level p and distance s which supports acoustic optical alarm and is designed to inspect, locate, evaluate and diagnose various defects.
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This Flaw Detector with High Precise (Free Store Data) is a high speed flaw detector which can be used as non-invasive measurement with an operating frequency range from 0.4 MHz to 15 MHz.
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GAOTek ultrasonic flaw detector with echo envelop enables to detect the flaw and position located with anti-interference
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This Digital Ultrasonic Flaw Meter (Master-Slave Menu) is designed with advanced technology digital multicolour TFT LCD with a material velocity in the range from 1000 m/s to 9999 m/s.
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GAO Tek Thermocouple Calibrator calibrates thermocouple measuring with optional temperature unit select.
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This Flaw Detector with High Anti-jamming (Water Dust-Proof) is designed to evaluate, diagnose and inspect several defects in a workpiece without destruction with various measuring ranges.