We have both Troxler and Humboldt gauges (as well as some older CPNs) and you probably want to buy the Troxler. It will be more expensive, but they are more reliable. The upside to a Humboldt is that it is assembled to allow for the user to replace parts without sending away.
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.
Advantages of the MODEL 4640-B FAST/ACCURATE RESULTS: In as little as one minute, the 4640-B displays densities in pcf, kg/m 3 or g/cm 3 and in percent Marshall, percent voids, or percent of maximum density (voidless). Accuracies within 1.5 percent of core results have consistently been achieved. ELIMINATES NEED FOR NOMOGRAPHS AND MANUAL CORRECTIONS: Variations in the density or composition of the base material do no affect the test results.
![Plus Plus](https://cdn.shopify.com/s/files/1/1245/4913/t/9/assets/home-in-line-image-3.png?17028434709254461490)
No field calculations or charts are needed to determine density. OPERATOR SELECTED DEPTH OF MEASUREMENT: Enter the thickness of the overlay into the gauge memory and then accurately measure the overlay density (compaction) without influence from the underlying material. ASTM APPROVED: The 4640-B meets or exceeds all applicable ASTM standards.
CALIBRATION: Test equipment is only as good as its calibration. With 30 years of proven experience, the 4640-B calibration process is unbeatable for its accuracy and results. For special materials, up to 11 field calibrations can be performed and stored.
USER FRIENDLY: The operator will find the 4640-B very easy to use. It was designed as a user friendly gauge with prompts to guide the operator through the test procedure. DATA STORAGE - COMPUTER COMPATIBLE: Store up to 750 readings by location and project number. Transfer stored readings to a printer of computer via RS232 interface. Additional site information can also be stored with each test. TECHNICAL SPECIFICATIONS Measurement Specifications Time (Min) Thickness kg/m 3 pcf Gauge Precision (± std. Deviation) at 2240 kg/m 3 (140 pcf) 1 4 2.5cm (1') 5.0cm (2') 6.3cm (2.5') 2.5cm( 1') 5.0 cm (2') 6.3 cm (2.5') ±16 ±10 ±8 ±8 ±5 ±4 ± 1.0 ± 0.6 ±0.5 ±0.5 ±0.3 ±0.25 Depth of Measurement 25-100 (1-4) mm inches Radiological Specifications Gamma Source 8 ± 1mCi Cesium-137 Troxler Drawing Number TEL A-102112 Source Encapsulation Stainless Steel Shielding Tungsten and lead Surface Dose Rates 5 mrem/hour max.
Get the embed code Hayley Westenra - My Gift to You Album Lyrics1.All I Have to Give2.Chestnuts Roasting On an Open Fire3.Chestnuts Roasting on an Open Fire (The Christmas Song)4.Do You Hear What I Hear?5.Gabriel's Message6.Mary Did You Know?7.Mary, Did You Know?8.Morning Has Broken9.Pokarekare Ana10.Silent Night11.Somewhere Over the Rainbow12.The Peace Song13.Through These Eyes14.You'll Never Walk AloneHayley Westenra Lyrics provided by SongLyrics.com Note: When you embed the widget in your site, it will match your site's styles (CSS). Hayley westenra husband.