Basics 7 min read
How GPR Works
Ground penetrating radar operates by transmitting pulses of ultra-high frequency radio waves (microwave electromagnetic energy) down into the ground through…
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Basics 1 min read
Ground Penetrating Radar
What is Ground Penetrating Radar? Ground penetrating radar (GPR) is a non-destructive geophysical method that produces a continuous cross-sectional profile…
Basics 3 min read
GUIDED WAVE TESTING (GW) Overview
Guided wave ultrasonic testing detects corrosion damage and other defects over long 33 ft. – 165 ft. distances in piping.…
Basics 2 min read
Remote Field Sensing
Eddy current testing for external defects in tubes where external access is not possible (e.g. buried pipelines), is conducted using…
Basics 6 min read
Pulsed Eddy Current Inspection
Conventional eddy current inspection techniques use sinusoidal alternating electrical current of a particular frequency to excite the probe. The pulsed…
Basics 2 min read
Swept Frequency
Swept Frequency Swept frequency eddy current techniques involve collecting eddy current data at a wide range of frequencies. This usually…
Basics 3 min read
Multiple Frequency Techniques
Multiple frequency eddy current techniques simply involve collecting data at several different frequencies and then comparing the data or mixing…
Basics 2 min read
Advanced Techniques – Scanning
Eddy current data can be collected using automated scanning systems to improve the quality of the measurements and to construct…
Basics 2 min read
Thickness Measurements of Non Conducting Coatings on Conductive Materials
The thickness of nonmetallic coatings on metal substrates can be determined simply from the effect of liftoff on impedance. This method has widespread use…
Basics 5 min read
Thickness Measurements of Thin Material
Eddy current techniques can be used to perform a number of dimensional measurements. The ability to make rapid measurements without…
