Precision density hydrometers acc. to DIN (DIN 标准密度比重计) Precision density hydrometers (通用密度比重计) Precision hydrometers acc. to British Standard(BS 标准密度比重计) Precision hydrometers acc. to ASTM and ASTM (ASTM 标准密度比重计) Precision hydrometers for mineral oil(矿物油密度比重计) Precision hydrometers for liquid gas (液化气密度比重计) Precision hydrometers acc. to Baumé (波美计) Precision saccharometers (糖量计) Precision hydrometers for breweries (酒厂专用糖量计) Precision alcoholmeters (精密酒精计) Precision hydrometers for must of fruits and grapes (水果/ 葡萄类精密比重计) Precision hydrometers for dairys (牛奶计) Precision hydrometers for special applications (特殊应用型比重计) Hydrometers made of plastic (塑料材质比重计) Hydrometers for testing accumulators (蓄电池专用密度比重计) Anti-freeze testers (防冻液专用密度比重计)