the Model 4640-B Thin Layer Density Gauge accurately measures the overlay density without influence from underlying material.
Special Functions:
| Measurement Gauge Precision ±1 std. deviation at 2240 kg/m3 [140 pcf]) |
|||
| Time (minutes) |
Thickness
|
kg/m3
|
pcf
|
|
1
|
2.5 cm (1″)
|
±16
|
±1.0
|
|
5.0 cm (2″)
|
±10
|
±0.6
|
|
|
6.3 cm (2.5″)
|
±8
|
±0.5
|
|
|
4
|
2.5 cm (1″)
|
±8
|
±0.5
|
|
5.0 cm (2″)
|
±5
|
±0.3
|
|
|
6.3 cm (2.5″)
|
±4
|
±0.25
|
|
| Depth of Measurement | 25-100 mm (1-4 inches) | ||
| Calibration | |||
| Accuracy of Density Standards | ±0.3% | ||
| Calibration Range | 100-170 pcf (1600-2700 kg/m3) Density | ||
| Radiological | |||
| Gamma Source | 8 ±1 mCi Cesium-137 | ||
| Troxler Drawing Number | TEL A-102112 | ||
| Source Housing | Stainless Steel Encapsulation (single or double) | ||
| Shielding | Tungsten and lead | ||
| Surface Dose Rates | 5 mrem/hr max. top and sides of gauge 15 mrem/hr max. bottom of gauge, gamma in shield position |
||
| Shipping Case | DOT 7A, Type A, Yellow II Label, 0.2 Transport Index | ||
| Sealed source approved for domestic and international shipment | CS-127, Special Form Certificate GB:SFC 140 |
||
| Electrical | |||
| Stored Energy | 30 watt-hours | ||
| Battery Recharge Time | 14-16 hours (automatic cutoff) | ||
| Charge Source | 110/220 VAC, 50-60 Hz or 12-14 V DC | ||
| Power Consumption | 0.1t6 watt-hours | ||
| Readout | 4×16 alpha-numeric LCD | ||
| Mechanical | |||
| Case | Colored polycarbonate top shell with aluminum cast base | ||
| Operating Temperature | 32º to 122º F (0º to 50º C) | ||
| Gauge size without handles | 18.6 x 9.1 x 6.2 inches (472 x 231 x 158 mm) |
||
| Gauge height with handles | 9.5 inches (240 mm) | ||
| Storage Temperature | 0º to 140º F (-18º to +60º C) | ||
| Weight | 29.7 lbs. (13.5 kg) | ||
| Shipping Weight | 90 lbs. (40.8 kg) with case | ||
