LWD

Light Weight Deflectometer

The Light Weight Deflectometer (LWD) is your go-to powerhouse for fast, on-the-spot soil and granular material testing. Portable and built for action, it delivers precise deformation measurements without breaking a sweat—or the ground.

Light Weight Deflectometer (LWD)

The Dynatest Light Weight Deflectometer (LWD) is a portable version of the Falling Weight Deflectometer (FWD).

The LWD uses a load cell and geophones with the same accuracy as the Falling Weight Deflectometer.

The LWD can be used to test thin asphaltic pavements, recycled materials bound with foamed bitumen and directly test unbound subbase and subgrade.

The output from the LWD can be used to calculate the strength of multiple pavement layers.

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LWD brochure LWD brochure US

The Light Weight Deflectometer (LWD) meets the ASTM 2583, the BS 1924-2 (UK) standard and more international standards for determining the modulus and compaction of the material. With this high quality LWD it is easy to do measurement in even the most rural places.

The LWD Connect packages gives a clear overview of the collected measurements and makes it a simple process to quickly collect new drops.
The LWD Connect provides export options, including export of dataset to the applied device, iCloud, or sharing through email.

When you purchase a Dynatest Light Weight Deflectometer (LWD), you will receive the LWD Connect package free of charge.

Get more information – LWD Connect

Key benefits

Single person operation
LWD Connect package free of charge.
Rapid test allows close test point spacing ensuring homogeneity of the test section.
Modulus output at time of test.
The LWD Connect packages gives a clear overview of the collected measurements.
Assessment of both the compaction and stiffness of material with the same unit.
Quality control of the subbase layers and subgrade before an overlay is applied.
Testing of trench restorations to reduce the chance of settlement over time.

More than just a product - It proves its worth.

A product designed to deliver results where it truly matters.

In this video, see how the LWD combines reliability and performance, showcasing its ability to exceed expectations in real-world applications.

Watch it in action and see the difference it makes.

LWD 3032 Base Unit!

Including:

Transportation box for base unit
One center geophone
Dual Plate System (150 and 300mm plate)
10kg weight (and 10kg weight buffer)
100mm plate
Ribbed rubber mat
Load plate centre hole plug
LWDConnect Software (LWD App + LWDmod)

Get a closer look

Drop Weight

Buffer Stack

Electronics Unit

150 mm Loading Plate

300 mm Loading Plate

Snap Lock

Watch this movie to see the smart features of the Dynatest LWD

Get to know more about the Dynatest LWD and how it works. Watch the movie.

LWD Smart Features

Optional LWD Accessories

A comprehensive optional accessory program are available to enhance your use of our LWD.

Optional LWD Accessories:

Transportation Trolley, for ease of transportation on-site
Geophone Kit, Sensor Beam incl. 2 additional geophones
Transportation box for Geophone Kit
Additional 200mm Loading Plate
Extra 5kg weights and required buffer plates (Possibility to add 2kg additional 5kg weights)

Contact us for accessories

LWD Training Courses

Our training courses are designed to provide you with in-depth knowledge ensuring effective use of our Dynatest LWD and software. These courses are tailored to meet the needs of beginners and experienced professionals.

Training Courses:

LWD Software training online – 3 hours
LWD online equipment training – 3 hours
LWD Equipment & Software Training on-line, 6 hours
LWD Equipment & Software Training, *on-site, 6 hours

*Please note that we will add costs for travel time, flight and accommodation etc. for training on-site at your location.

Get Training

Unpacking your new Dynatest Light Weight Deflectometer (LWD)

This is a tutorial video on how to go about unpacking your new Dynatest Light Weight Deflectometer (LWD)

How to unpack your LWD

The LWD App and Software Package (LWD Connect)

The LWD becomes powerful with the LWD Connect package.

The LWD Connect package comes free of charge and gives you great data collection opportunities, with market leading functionalities via an App for both iOS/Android. The LWD software LWDmod adds calculations, statistics and analysis options beyond your imagination.

Structured approach

Create hierarchal databases for data collection (Project, Session, and Location).
Input data collection attributes, assumptions & comments
Ability to collect real time GPS location
Ability to capture and tag photo images on each test location
Offline data acquisition
Instant surface modulus results, figures, and summary tables, on Location, Session, and Project level
Data export and sharing for post-processing with LWDMod or similar program
The database file from your LWD App can be shared via email or exported directly to the phone’s memory.

LWDMod software

The LWDMod software provides an ideal analysis package for the LWD collected data.

lmport and edit LWD data for removal of outliers
Export test results to Excel or Word for further analysis
Export to UK requirements
Export: point number, location, drop number, time, plate size, load, stress, geophone(s) distance(s), geophone(s) deflection(s), surface deflection moduli, deflection offset.
Export: temperature, surface temperature, material temperature, GPS/notes, time histories, CBR soil, compaction results
Data Visualization—including figures and summary tables
Calculation and Analysis: back-calculation of layer moduli, overlay design thickness calculations, subgrade no-linearity, and estimation of the layer thicknessGet more .

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Dynatest provides clients around the world with high-quality equipment for pavement evaluation.

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