BS 718 hydrometers for petroleum - S60/60F M50 SP hydrometers

BS 718 : 1960 is generally aligned with ISO 387 and ISO 650.
This sub-series has a greater accuracy than the standard M50 Series, and is only available over
a limited range of density. The length is 270mm and the range span covers 0.050 S60/60°F with
divisions to 0.001 S60/60°F. 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.