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01Overview

Particle size distribution
from your phone.

Granumetrics turns a phone photo of coarse aggregate, 2 mm and up, into a particle-size distribution on the EN 933-1 axes your lab already uses. Run fast checks on site, as often as the material needs it, without sending every sample through the lab.

Request free pilot↗How the pilot works↗
Result time
~2 min
typical upload + analysis
Precision
±3.4 pp
interim pilot · vs. mechanical sieve
Working range
2 mm and up
coarse aggregate
Standard
EN · ASTM · ISO
933-1 · C136 · 17892-4 · cumulative-passing axes
Hardware
a phone
12 MP minimum · 48 MP preferred
02
How it works

The same answer,
in a different tool.

A mechanical sieve sorts particles by the openings they pass through. Granumetrics measures each particle directly in the photograph and returns a PSD curve and D-values in the format your lab already uses.

Built for coarse aggregate, 2 mm and up. The lab keeps the certified test and the fines; Granumetrics covers the coarse fraction, on site, as often as you need to check it.

  • MethodPer-particle boundary detection from the photograph
  • CalibrationRuler, or printed ChArUco board
  • OutputD10 · D50 · D90 · full curve on phone · CSV/PDF on web
  • Working range2 mm and up · no upper limit
  • Minimum sample800 particles per analysis · 3,000 recommended
  • RoadmapShape descriptors · Packing optimization · Fine fractions (<2 mm)
03
Evidence

What the software measured.

879 particles detected across two frames, scale set from the ruler in frame.

Detected boundariesGhvid 4–8 mm white granite on a black tray, with green outlines drawn around each detected particle and a yellow folding ruler at the top for scale calibration.
Detail · 566 particlesDensely-packed detail crop of the same Ghvid sample showing individual particle boundaries.
MaterialGhvid 4–8 mm · Danish white granite
Frame 1 · particles313 · full frame
Frame 2 · particles566 · detail crop
Scale calibrationRuler · 0.054 mm/px
04
The flow

Six screens between
a pile and a curve.

From photo to PSD, in six steps.

Step01Setup

Define the specimen.

Pick the material, name the analysis, set the photo count, and choose the scale reference.

Step02Method

Camera or gallery.

Take new photos in the field, or analyze ones already on the device.

Step03Capture

Capture the sample.

Grid, exposure lock, and a level keep the photos consistent.

Step04Calibrate

Set the scale.

Mark the ruler ends, or drop in a printed board, so sizes resolve to millimeters.

Step05Analyze

Run the analysis.

Every particle is detected, sized, and assembled into a cumulative-passing curve.

Step06Result

Review and export.

D-values and the curve appear on the phone; review and export PDF or CSV from the web app.

05
Compared

How the methods
compare.

Where each method runs, what it costs, who runs it, and the range it covers.

Sieve testLab reference
Image analysisLab camera system
Laser diffractionFines instrument
GranumetricsPhone app
Time per analysis
25-60 min + drying
~5 min
~5 min (incl. dispersion)
PSD in minutes after upload
Capital cost
$5–20K (sieves + shaker + oven)
$60–90K new · ~$30K used
$40–80K (Malvern, Beckman, Horiba)
No dedicated lab hardware
Per-test cost
Lab labor
Maintenance + filters
Dispersion solvents + maintenance
Included in the plan
Where it runs
Lab only
Lab only
Lab only
Field or lab
Operator
Trained lab tech
Trained lab tech
Trained lab tech
Field crew, after short training
Output basis
EN 933-1 reference method
ISO 13322-2; sieve-correlated output
ISO 13320; not EN 933-1
EN 933-1 cumulative-passing axes, benchmarked against the sieve
PSD range
0.063–125 mm sieve set; EN 933-1 scope to D=90 mm
~20 µm – 30 mm (lab-bench)
~10 nm – 3.5 mm (fines only)
Coarse aggregate, 2 mm and up
Time per analysis
Sieve test25-60 min + drying
Image analysis~5 min
Laser diffraction~5 min (incl. dispersion)
GranumetricsPSD in minutes after upload
Capital cost
Sieve test$5–20K (sieves + shaker + oven)
Image analysis$60–90K new · ~$30K used
Laser diffraction$40–80K (Malvern, Beckman, Horiba)
GranumetricsNo dedicated lab hardware
Per-test cost
Sieve testLab labor
Image analysisMaintenance + filters
Laser diffractionDispersion solvents + maintenance
GranumetricsIncluded in the plan
Where it runs
Sieve testLab only
Image analysisLab only
Laser diffractionLab only
GranumetricsField or lab
Operator
Sieve testTrained lab tech
Image analysisTrained lab tech
Laser diffractionTrained lab tech
GranumetricsField crew, after short training
Output basis
Sieve testEN 933-1 reference method
Image analysisISO 13322-2; sieve-correlated output
Laser diffractionISO 13320; not EN 933-1
GranumetricsEN 933-1 cumulative-passing axes, benchmarked against the sieve
PSD range
Sieve test0.063–125 mm sieve set; EN 933-1 scope to D=90 mm
Image analysis~20 µm – 30 mm (lab-bench)
Laser diffraction~10 nm – 3.5 mm (fines only)
GranumetricsCoarse aggregate, 2 mm and up
06
Pilot

Validation underway
with Danish quarries.

Methodology shared on request
Interim pilot MAE
±3.4 pp

Mean absolute error against mechanical-sieve results on Danish aggregate. When the pilot is complete, we’ll publish the full set, including the cases where it agreed least with the sieve. Until then, the method and current numbers are available on request.

Status
In pilot

Pilot projects are underway. Request a paired test on your own material and compare Granumetrics against your lab sieve result.

Run your first
analysis.

Start with a free pilot and compare Granumetrics against the sieve workflow you run today.

Request free pilot↗How the pilot works↗

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