Recognizing the need for an improved method of measuring the
density of thin layer asphalt overlays, Troxler, the world
leader in nuclear gauge technology, developed the first true
thin layer density gauge, the Troxler Model 4640-B.
Designed to measure the density of thin asphalt and
concrete layers from 2.5 to 10 cm
(1 - 4 inches), the
Troxler Model 4640-B Thin Layer Density Gauge accurately
measures the overlay density without influence from
underlying material. No nomographs or manual corrections are
required in order to compute the true density of the
overlay. With on-site results available in as little as one
minute, the Model 4640-B can provide the user with test
results when they are needed, not hours after compaction has
been completed.
The 4640-B is now being used by many government agencies
and contractors as the only approved test method for density
measurements on bituminous overlays.
The Model 4640-B meets ASTM Standard Test Method D-2950.
Features
& Benefits
The
Model 4640-B provides you with these advantages:
• True thin-layer
gauge, no nomograph calculations needed
• No need to measure the density of base
materials
• Stores of up to
750 test results
• Forty years of Troxler experience and a
twelve month warranty give you the confidence
you need in your field testing equipment.
Designed to measure the density of thin asphalt and
concrete layers from 2.5 to 10 cm 
