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GAOTek provides instruments for geotechnical testing such as EMF meters, kinematic viscometeres, rotational viscometers, demulsibility testers, and aniline point testers. Geotechnical engineering concerns the behavior of earth materials at the site of a civil engineering project. Our EMF meters are reliable instruments for measuring AC electromagnetic fields, which are usually emitted from man-made sources such as electrical wiring.

Geotechnical Engineering: A Detailed Description

Functions of Geotechnical Testing Equipment

Our EMF meters are products design for measuring the electromagnetic radiation and displaying the results of measurement on a digital display. The principle of operation of these devices is based on the conversion of the magnetic field oscillations into electric voltage oscillations, frequency filtering, and amplification of these oscillations, followed by digitalization and numerical analysis of the results. Our products detect sources of interference, find out more about their causes, determine the frequency and intensity of the signal sources, measure limits and more.


GAO Tek’s instruments for geotechnical testing equipment are easy-to -operate and reliable devices. They have special features such as LCD digital display that will indicate the sum total field strength of all sources within its frequency range, convenient conversion table, excellent sensitivity, and auto power off that is useful to save on battery use. 

Applications and Industries

GAO Tek’s products for geotechnical testing have a variety of applications such as measuring and determining the electromagnetic field radiation levels around power lines, electrical appliances, and industrial devices.


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