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INSPECTOR-4

Light Falling Weight Deflectometer

INSPECTOR-4 is a portable falling weight deflectometer (LWD) for measuring the ground elastic modulus, maximum deformation, compaction factor, elastic deflection and deformation time. It is ideal for testing in regular or difficult to access areas. 

The deflectometer can be used in design, construction, maintenance and quality control of buildings, subdivisions, roads, railways and other environments to measure elastic modulus of unbound or partially bound material, including asphalt, granular aggregation base, base layers, soil, concrete etc.

INSPECTOR-4 is portable, compact and can easily be used by a single operator. The device’s intelligent built-in electronic unit calculates and displays the results immediately after the series of measurements is completed. All measured data is stored and can be downloaded to a computer via USB or Bluetooth connection. The results can also be read to the user’s mobile phone and forwarded via e-mail to off-site staff for real-time verification against expected results.

A separate GPS unit is available to determine and store the exact location of the measurement, which can later be graphically displayed in Google Maps.

Features and Benefits

  • Compact and easy to set up and use

  • Real-time calculation and display of measurement results

  • Results stored in device memory

  • Computer connection with USB or Bluetooth

  • Data can be sent to user’s mobile phone

  • Display for alarms and monitoring

  • Separate GPS unit to determine and store measurement locations

  • Electronic unit can be detached for separate shipment if needed

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Technical Specifications

Metric

Units

Value

Falling weight

kg

10

Loading force

kN

23

Falling weight drop height

mm

800

Loading plate diameters

mm

140 and 200

E-modulus range

MPa

5 - 900

Supply

V

3 (2x 1.5V alkaline batteries)

Number of measurements per battery set

>1000

Operating temperature

°C

-10 to +40

Protection level

IP65

Weight (excluding carrying case)

kg

16

Dimensions

mm

1150 x 110 x 110