The Non-nuclear asphalt density gauge is directly proportional to the dielectric constant of the material being tested. In the case of a magnetic field generated by the sensing plate, the GTJ-2701 uses an innovative, spiral magnetic field to test the dielectric constant. The field signal is converted to a material density reading by the electronic components of the GTJ-2701 and displayed on the screen. Once the instrument is calibrated, the density can be read once.

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