Pilot study: Intercomparison of Soil Moisture Measurement

Project Description

The intercomparison is conducted as part of the joint research project (JRP) 21GRD08 SoMMet Metrology for multi-scale monitoring of soil moisture.

The aim of the intercomparison is to test the measurement standards and methods developed by the partners in the project using soil-samples.

Final Report 2026-04-20

The EURAMET P1685 pilot study successfully carried out an interlaboratory comparison of soil moisture measurements for both organic and inorganic soil samples using gravimetric water content as the measurand.
The study involved four participating laboratories (DTI, CETIAT, CMI, and TUBITAK-UME) and was conducted according to EURAMET Guide No. 4 and DS/EN ISO/IEC 17043:2010.

The sample homogeneity and stability were assessed. Homogeneity and stability assessments confirmed that the sample materials were suitable for interlaboratory comparison, with very low standard deviations (≤ 0.15 % w/w).

The bilateral Degrees of Equivalence (DoE) indicate that there are no significant differences between any pair of participants for both soil types.

For further details, please refer to the intercomparison report.

The report can be downloaded here>>.

Progress Report 2025-03-17

Partners have received samples and are performing measurements.

The measurements with primary measurement standards have been. Homogeneity measurements at DTI are completed.
Transport stability measurements will be completed during March