Geotest nuclear moisture density gauges are used to quickly determine density and moisture content of soils and other materials. While all nuclear gauges use similar methods to measure moisture and density, these gauges manufactured by Seamen have some unique advantages:
- Safer: Safest possible nuclear design as source never leaves the meter. There is also automatic shielding when carried.
- Reduced licensing costs in states not requiring NRC license due to availability of optional natural source.*
- Faster testing times.
- Larger samples tested: Using a new back scatter technology permits testing samples up to 20 times larger than direct transmission units.
- Factory set density calibration to eliminate operator error.
*Natural source is standard on E-1430.
The nuclear method is now widely used and highly respected.
- Measure the density of asphalt or concrete overlays as thin as 0.7" or as thick as 6", regardless of the underlying base density.
- Completely nondestructive–no holes to punch.
Until the technological breakthrough of "Accudepth", nuclear density meters could not accurately measure the density of thin-lift overlays. The densities they measured were an average of the top and bottom lifts. If the bottom lift was a lower density, it was often necessary to compact the top lift an extra 3% or more to make up for the underlying base density. This was costly in terms of rolling hours and penalties. "Accudepth", now standard equipment on E-1430, E-1431 and optional on E-1400 answers this problem once and for all by accurately measuring the density of the top-lift, independently of the base density.
Exclusive Air Gap Method
E-1400, E-1430 and E-1431 employ the "optimum air-gap" technology to test density and moisture more accurately in a completely nondestructive test. Since the source never leaves the meter, there are no holes to punch or drill in the soil or pavement. The base material is left undisturbed. This exclusive Seaman technology not only results in more accurate testing, but also safer and faster testing.
Here’s how it works. The meter is placed in contact with the soil or pavement and a test is taken. Then the air gap stand is placed under the meter and a second test is made. The meter holds both tests in its memory and automatically makes a calculation that eliminates the chemical effect of the soil or base material to make a true density determination. Then when the appropriate buttons are pressed the meter will display wet or dry density in PCF, and moisture as a percent of dry weight or density as a percent of lab density previously entered in meter’s memory in either metric, U.S. standard units, or specific gravity.
Note: We have rentals and a limited supply of used-rebuilt nuclear gauges. Check with us for details.