Balloon Density Apparatus

Its elastic membrane conforms to the geometry of the excavation, allowing accurate transfer of the pit volume; the value read on the graduated indicator is used directly for volume calculation. Water pressure is controlled by a pressure gauge. The body is manufactured from corrosion-resistant alloys, with well-balanced lifting/handling points for stable weight distribution during transport. Sealing is ensured using chemical-resistant O-rings. Membrane replacement and valve maintenance can be performed quickly by the user; commonly available spare parts can be replaced in the field. The apparatus is optimized for precise volume determination in fine-grained and medium-compact soils.