Measurement Range: 0 - 70 Bé° Bomemeter is a density measuring device that works on the principle of buoyancy of liquids. There is a weight at the bottom of the closed glass tube. When immersed in a liquid, looking at which line the liquid surface reaches gives a rough idea about the density of that solution. The boom meter shows 0 in pure water. Calculation Method: For liquids denser than water: Specific density = 145 / (145 - degrees bome) For liquids less dense than water: Specific density = 140 / (130 + degrees bome)