Road thickness gauge StratoTest 4100

for concrete structuresportabledigital display

Product overview
A measuring device designed for heavy-duty site use to determine the thickness of non-metallic construction layers such as bituminous mixtures (asphalt), blast-furnace slag, gravel and concrete. Measurement is non-destructive and TP D-StB 12 approved for individual and total layer thickness measurement in road construction. In road applications an aluminium foil is placed at the base of the asphalt layer to act as a reflector; the foil is embedded by the aggregate and does not impair inter-layer bonding. Unlike core drilling, this method does not damage the construction layer. Measuring reflectors are detected via a bar-graph display on the instrument or acoustically using the supplied headphones.

Probes

• N 100ST: Up to 100 mm to measure the wearing course in road construction
• N 400ST: Measuring range 0–400 mm to measure base and wearing courses in road construction

Application

• Non-destructive thickness measurement of non-magnetic layers in construction
• Asphalt, slag, gravel and concrete layers in road construction
• Concrete layers in landfill construction

Features

• Non-destructive measurement
• TP D-StB 12 approved
• Measuring range up to 400 mm (depending on probe)
• Direct digital display of thickness
• Unlimited repeated measurements at the same spot
• Easy location of measuring reflectors (bar graph and acoustic)

Supply

• StratoTest 4100 device
• Measuring probe N 400ST (standard)
• Foldable dolly for measuring
• Calibration plate
• Headphones
• 9 V block battery, type 6LR61
• Plastic carrying case

Measuring ranges
0 ... 40 cm · N400ST standard probe
0 ... 10 cm · N100ST optional probe
0 ... 80 cm · N800ST optional probe

Technical specifications

• Measuring principle: eddy current testing
• Measurable layers: all non-metallic road layer materials
• Reflectors: aluminium foils or steel sheets in common sizes
• Measuring range: 0 ... 40 cm (N400ST); 0 ... 10 cm (N100ST); 0 ... 80 cm (N800ST)
• Resolution: 0.1 cm for 0 ... 30 cm; 0.2 cm for 30 ... 35 cm; 0.4 cm for 35 ... 40 cm
• Typical tolerance (standard probe, aluminium reflectors 0.7 m x 0.3 m and 1.0 m x 0.3 m): 0 ... 30 cm: ±(0.1 cm + 2% of reading); 30 ... 35 cm: ±2% of reading; 35 ... 40 cm: ±3% of reading
• Display: digital LCD
• Data memory: DIRECT mode ≈ 500 single readings with statistics; SITE mode ≈ 6,000 single readings with statistics; 5 site memories with 300 stations each; 4 measuring spots per station; 5 layer material types per spot
• Power supply: 1 x 9 V alkaline battery (type 6LR61)
• Battery life: approx. 20 hours
• Ambient temperature: gauge 0 °C–50 °C; probe 0 °C–70 °C