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HMP LFG Pro Light Weight Deflectometer

Light Drop Weight Tester

The HMP LFG PRO portable light drop weight tester also referred to as Light Weight Deflectometer or LWD is a dynamic plate load test that is used to determine the soil bearing capacity and compaction quality of soils and non-cohesive sub-bases, as well as for soil improvement applications. Built-in soil layers can easily be tested without load abutment, facilitating quick assessments of test lots even under limited space conditions. The test method is suited for coarse-grain and mixed grain soils having a maximum grain size of 63mm and can be used to determine the dynamic modulus of deformation of soil (resilience) in the range Evd = 15...70MN/m2.

The equipment in conformance with the German Technical Test Standard for Soil and Rock In Road & Railway Construction TP BF-STB Part B 8.3/issue 2003, and conforms to the latest ASTM E2835 standards in relation to use of the equipment for measuring soil compaction quality or directly measure the EVD deformation modulus; The HMP LFG 4provides measurements that have direct correlation to static load test (DIN18134, BS1377, ASTM D1194/1195/ 1196) & Procter test (Dpr)*.

The LFG provides measurements that have direct correlation to:

  • Road construction.
  • Railway construction.
  • Earth works.
  • Pipe & canal construction.
  • Examination of foundation fillings.

Provided with GPS for logging test locations, Large 16 line LCD display, Thermal Printer for On Site printing of test results, USB for data transfer, Software for data analysis and a Trolley Cart to allow easy transportation of equipment at site

Contact us for HMP LFG 4 or HMP LFG Pro Light Weight Deflectometer Price in India


Product Specification
Technical Specifications :
Loading Mechanism :
Total Weight 15.0 kg
Drop Weight 10.0 kg
Max. Iimpact Force 7.07 kN
Duration of Iimpact 17.0 ± 1.5 ms
Material Zinc coated/hard-chrome plated steel
Load Plate :
Diameter 300 mm
Plate Thickness 20 mm
Total Weight 15 kg
Material Zinc coated steel
Electronic Settlement Measuring Instrument :  
Power Supply 4 X R6 batteries
Dimensions 216 mm x 90 mm x 40 mm
Settlement Measuring Range 0.1 to 2.0 mm ± 0.02 mm
Measuring range Evd Evd < 225 MN/m
Temperature range 0 to 40°C
Storage Capacity of Measured Data 1000 series
Menu Navigation Selectable
Only 2 minutes to Test Results:
Prepare :
Prepare the testing ground by positioning the machine on the surface and pre compact the test surface using the equipment itself by dropping the weight 3 times

Measure :
Press (Power) to switch on the settlement measuring instrument.
Perform 3 impacts in succession.
The settlement value in mm is displayed after each impact.
After completion of the test, the average settlement, the deformation modulus, the path to-speed ratio, and the settlement curve are calculated.
Settlement curves can be viewed on-site.
On-Screen Display to show the calculation as well as graphs:On Screen Display of Eud & Graphs
Document Measured Data By Thermal Printer
Document Measured Data by Thermal Printer:
Printing of measured data from memory for documentation purposes at any time and in any place. The thermal printer is integrated with the LFG Pro unit in the protective case.
The instrument is also compatible with an external GPS receiver (optional item).
Evaluation Via PC Software:
Series of measured data can be transferred to a PC for evaluation by software.
Connect the PC to the settlement measuring instrument (or transfer data by USB stick).
Evaluate, revise & archive measured values on PC.
Comfortable processing of the protocol by means of a special.
Evaluation Via PC Software

Read in measured data HMP LFGpro – Messgerät

For reading in measured data the following steps have to be carried out:

  • Connect the provided USB cable to a free USB interface of the PC and the settlement measuring instrument.
  • Switch on the settlement measuring instrument.
  • Select and acknowledge the transfer mode “device"
  • PC” (menu "measured data/USB”) in the settlement measuring instrument. The settlement measuring instrument appears in PC as a removable medium
  • Select the register LFGpro reading.
  • Select the appropriate removable medium and press the Reading data button. The measured data will be transferred to the PC.

 Read in measured data HMP LFGpro – USB stick

For reading in measured data the following steps have to be carried out:

  • Connect the USB stick to a free USB interface of the PC. The USB stick appears on the PC as a removable medium. On a USB stick the measured data are stored in folders. During each transfer of measured data from the settlement measuring instrument to the USB stick, a new folder will be generated. The name of the folder contains the date and time of the transfer time (format MMDDhhmm).
  • Select the register LFGpro reading.
  • Select the appropriate removable medium, open the desired folder, and press the Reading data button. The measured data will be transferred to PC




Store measured data

When data successful read in, the following display is displayed:



All read in measured data can be stored in one data file by file - save us. It is also possible to store several measured series separately. So the measured series can be assigned to the projects.

For storing several measured series:

  • Mark the measured series of the project.
  • Press the save particular data button.
  • Select the directory, type into the file name (e.g. name of the project) and click “OK”.

After opening the stored file (file- pen) additional measured series can be stored separately how described above.

For deleting several measurements please mark these measurements and press the delete button.


Head Data

 Enter head data e.g. address of customer and executive, data of measurement point, All data will be printed in protocol and stored in file. Measuring data


Measuring Data


Displaying of all stored data for this measurement point. Measure. Point window – enter specific data for this measurement point. This data will be printed in the protocol.




Calculation of statistical parameter for several test points after entering a minimum quantity.


Print graphics        Printing of data and graphics of one measurement point.
                           Select the measurement point by entering the number in the input field or by pressing the                                 arrow keys in the upper area of the program window.
Print chart               Printing of all data in a chart (without graphic)
Chart with Ev2       Printing of data and an additional column for Ev2 and remarks (without graphic)
Statistics                Printing of statistical parameter

Print chart and chart with Ev2: If only special measuring series should be printed out, mark these series in Reading data index before the print starts.

Product Info Downloads
Product Info Downloads

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