Dynamic Asphalt Strain Gages (ASG/VASG) measure axial strain in flexible pavement under high frequency (dynamic) conditions. These low modulus, ruggedized sensors are built to withstand the high temperature and vibratory rolled compaction required for asphalt placement.
Utilizing four active elements of a Wheatstone Bridge circuit, this gage is easily adaptable to most data acquisition systems. Each sensor is individually calibrated with high temperature resistant lead wire attached and is provided with QC documentation and calibration data.
The low-profile, field-proven design allows for measurements closer to the bottom surface, placement in shallower pavement lift heights, and easier retrofit installations. High-temp wire with braided shielding protect the lead wire from extreme heat and signal noise.
Features & Benefits
Rugged Design
Built to withstand the high temperature and vibratory rolled compaction required for asphalt placement
Convenient Connectivity
Use with most data logger manufacturers offering strain gage connections
Customizable
Gages can be customized to required length, horizontal or vertical orientation, and length of high temp and/or standard wiring
Installation Support Available
Geocomp can offer the service to plan, install, and support remote data logging and dashboard for all gages
Specifications
Gage Length
6 in (152 mm) standard
Other options available
Circuit
Full Wheatstone bridge with 4 active 350-ohm (+/- 0.2%) strain gages
Range
>5,000 microstrain
Sensitivity
~1.3 mVout/Vexc (at 1000 ME)
Excitation
1-5 Vdc recommended (up to 10 Vdc max)
Output
mV level, ratiometric to Excitation
Power
300 mW max, 72 mW @ 5 Vdc typical
Temperature Range
-35 to 204°C (-31 to 400°F)
Lead Wire
25 ft (standard) of high-temp 22-30 AWG braided 4-wire with shielding; custom lengths available