This study has been performed by Pr. Lerouge Lab (The Canada Research Chair in Biomaterials and Endovascular Implants) and published in the JOURNAL OF BIOMEDICAL MATERIALS RESEARCH B: APPLIED BIOMATERIAL.
Measurements of the ElastoSens™ family of products (Bio & X3) have been compared with those of a rotational rheometer (MCR 301, Anton Paar) on agarose gels during the gelation kinetics. The figures below show the comparison of the elastic shear modulus (G') and the phase angle tan(d) of an agarose gel (Noble Agar, Sigma, A5431, 1.4% (w/w)) during the gelation kinetics as measured with the ElastoSens™ Bio and the rotational rheometer (measurements of G', G”, and Tan(d) were performed in the linear viscoelastic region, at 1 Hz and 0.1% strain). It is noticeable that the two instruments measure identical viscoelastic properties. More details on the comparison (error bars and precision) may be found in the scientific article.
ElastoSens™ Bio has also been compared to unconfined compression tests. Compression tests have been performed using the Physica MCR 301 (Anton Paar) equipped with parallel plates (P25/P2). The comparison has been carried out on chitosan gels having different compositions and different viscoelastic properties. Compression was applied at a constant rate of 0.5 mm/s until reaching 50% deformation. The secant Young modulus was calculated from the stress-train curves at 5% strain. Since the material is incompressible, the Young modulus and the elastic shear modulus are related by the following simple equation: E=3*G. The figures below show how the measurements of the ElastoSens™ Bio compare to those of compression tests. One can see that both technologies are very well correlated.