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Falling Weight Deflectometer

Product Code : EL-BTLE-10454

Quick Answer: A Falling Weight Deflectometer (FWD) is used to measure the vertical deflection response of a pavement surface to an impulse load, using precision load measurement and deflection sensors to record pavement surface characteristics for calculating properties such as Bearing Capacity, Layer Thickness, E Moduli, and Expected Surface Life. It can also determine the actual materials used and in what combination to build the pavement surface, and identify voids underneath the surface or how two surfaces (typically concrete slabs) are in contact with each other. It offers one of the fastest testing speeds per point (3 drops) at ≤ 20 seconds (reducible to ≤ 10s with fast measurement software), a deflection range of ± 3.5mm (± 5mm optional), GPS-guided positioning, and infrared plus PT100 temperature monitoring, with data easily transferred to a PC via USB memory key or direct connection.

A Falling Weight Deflectometer (FWD) is used to measure the vertical deflection response of a surface to an impulse load. Precision load measurement and deflection sensors record the pavement surface characteristic, which is used to calculate pavement proper ties such as Bearing Capacity, Layer Thickness, E Moduli, Expected Surface Life.

FWD can also be used in determining the actual material used and in what combination to build the pavement surface. It also identifies voids underneath the surface or how two surfaces, typically concrete slabs, are in contact with each other. FWD is user-friendly with an automatic self-check of results – data is easily transferred to PC via the USB memory key or by a direct connection.

Main advantages
The global quickest testing speed per point (3 drops) is ≤ 20 seconds, and available to reduce to ≤ 10s per point if fast measurement software applied.
While other our local suppliers only could reach the testing speed per point(3 drops) to be about 40 seconds in average, even compare to imported FWD with the testing speed per point (3 drops) about 30seconds, FWD has the great advantage on the testing speed.
Multi load control including allowable load, allowable deflect height, target deflect length (specially for void testing)
Equipped operate software with GPS function to locate the testing position precisely.
Larger deflection range	± 3.5mm (± 5mm optional)
Infrared + PT100 temperature monitor to test the atmosphere and pavement temperature
Intellective remind function of operate software to guide the driver to park the vehicle at the right testing location.
Fully-automatic one-key operation for operator when arrived at the testing location, also automatically to change into lock condition after testing process done.
High deflection accuracy based on unique laser absolute calibration.
Bisync lift platforms for FWD.
Backup plan for each main function.

For this and other bitumen and asphalt testing lab equipment, schools and colleges can contact Engineering Lab Equipment, a manufacturer, supplier and exporter based in Ambala, India.

Last Updated: September 2026