Mesura proveta Hellmann comercial de vidre	Mesura efectiva de la mateixa quantitat en proveta homologada Thies
0.5 mm	0.4 mm
1 mm	0.9 mm
1.5 mm	1.4 mm
2 mm	2.2 mm
2.5 mm	2.8 mm
3 mm	3.1 mm
3.5 mm	3.2 mm
4 mm	3.7 mm
4.5 mm	4.2 mm
5 mm	4.7 mm
5.5 mm	5.2 mm
6 mm	5.7 mm
6.5 mm	6.2 mm
7 mm	6.8 mm
7.5 mm	7.3 mm
8 mm	8.4 mm
8.5 mm	8.8 mm
9 mm	8.9 mm
9.5 mm	9.4 mm
10 mm	9.9 mm