BS 718 hydrometers for petroleum - S60/60F L50 SP hydrometers

BS 718 : 1960 is generally aligned with ISO 650.
This sub-series has a greater accuracy than the standard L50 Series, and is only available over
a limited range. The length is 335mm and the range span covers 0.050 S60/60F with divisions to
0.0005 S60/60F. They are adjusted at 60/60°F and suitable for low surface tension.
This sub-series is commonly used in the Petroleum industry and corresponds to IP 160.