容积，1/20 cu. ft. (1600毫升)的能力

Voluvessels determine the in-place density of compacted or firmly-bonded soils using a rubber balloon apparatus viewed through a graduated, direct-reading clear plastic cylinder. 洪堡's H-4166 voluvessel is designed with a plastic cylinder, which screws into the density plate with the pump assembly mounted on top. Both voluvessels include a pressure-vacuum pump assembly, 压力计, 快速连接器阀, double-graduated cylinder, 10 balloons and a density plate. Voluvessels are not suitable for soft soils that deform under a slight pressure or where the volume of the hole cannot be maintained at a constant value. The Voluvessels are individually calibrated before leaving the factory to ensure direct readings on the scale are accurate without the need for calculations. H-4166 is used with max.-sized soil particles of 0.5" (13mm).

For more information about 洪堡's compaction/density testing solutions, 点击这里.