BS 5470 – Specification for glass alcohol hydrometers not incorporating a thermometer
A series of 11 instruments covering the range 780 to 1000 kg/m^3, accurate to 0.2 kg/m^3 for reference temperature of 20°C. Approved by HM Customs and Excise and complies with the requirements of EEC Directive 76/765/EEC. The associated thermometer is specified in BS 5471.