Traditional manometric technique for BOD analysis, with concentrations of up to 1000 mg/l (ppm). The BMS 6 is the traditional method for testing Biochemical Oxygen Demand, by using the traditional manometric technique for concentrations of up to 1000 mg/l (ppm); higher concentrations must be diluted before analysis. The instrument houses 6 bottles each with manometer and 4 scales for concentrations of up to 90, 250, 600 and 999 ppm BOD. The 500ml bottle can take sample quantities of from 100 to 400 ml. The 6-position magnetic stirrer incorporated in the base of the instrument ensures continuous stirring of the samples