INSPECTOR-4M Light Weight Deflectometer LWD with Built-In GPS unit

Englo's INSPECTOR-4M is a lightweight deflectometer (LWD) designed for fast and reliable in-situ measurement of pavement bearing capacity and stiffness. The device measures surface deflection under a dynamic load and calculates deformation parameters used to evaluate the structural condition of road layers and subgrade.

Compact, robust, and easy to operate, INSPECTOR-4M is ideal for construction quality control, pavement assessment, and geotechnical field testing.

Features and Benefits

Accurate Surface Bearing Capacity Measurement

• Measures dynamic surface deflection

• Calculates deformation and stiffness parameters

• Suitable for assessing base layers, subgrade, compacted soil as well as pavement and concrete

• Calibration service available to ensure highest accuracy

Compact, Portable & Field-Ready Lightweight Deflectometer

• Unique, compact design eliminates complex operating procedures or on-site assembly

• Special casing shields the device from outdoor elements

• Ideal for on-site testing without heavy equipment

Fast & Reliable Results for Quality Control

• Built-in GPS to obtain and store measurement coordinates 

• Real-time calculation and display of measurement results with alarms

• Results stored in device memory with USB or Bluetooth computer or mobile phone connection 

• Supports construction and compaction quality control

• Enables rapid decision-making directly on site

• Reduces reliance on laboratory testing

Versatile Application Range

• Suitable for roads, airfields, industrial areas, and construction sites

• Applicable to granular layers, bound layers, and soil surfaces

• Effective for both new construction and rehabilitation projects

Typical Applications

• Pavement bearing capacity testing

• Subgrade and base layer evaluation

• Compaction quality control

• Road, airfield and building construction

• Civil engineering and geotechnical investigations

Why Choose INSPECTOR-4M Lightweight Deflectometer?

• Portable alternative to heavy Falling Weight Deflectometers (FWD)

• Fast, repeatable, and cost-effective field testing

• Unique design simplifies operator bring-up, measurements and maintenance

• Suitable for routine inspections and acceptance testing

• Calibration service available