Ring for measuring surface tension

For measuring the surface tension of liquids, aluminium ring with sharp edge, means of suspension, cord length: approx. 200 mm
Ring D=60 mm, H=7mm, weight: 7 g

Recommended additional apparatus:
C6110-1D Petri dish D=150 mm, glass
DS504-2K Sliding saddle, height adjustable
DS103-1T Table on stand, small