Tỷ trọng kế đo đất ASTM 151H, loại B
Hãng Alla- Pháp
-Thang đo : 0.995 … 1.038g
-Dùng thí nghiệm thành phần hạt của đất
-Phù hợp tiêu chuẩn ASTM 151H, loại B
Nhà sản xuất
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- Kanomax – Japan
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- Kern – Germany
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- Optima – Japan
- Palintest – UK
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- Pfeuffer – Germany
- Pharmatest – Germany
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- Quantek – USA
- Raypa – Spain
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- Rong Tsong – Taiwan _ Mill Powder Tech – Tawain
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- Schmidt + Heansch – Germany
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- Seward – UK
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- Summit – Korea
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- Takemura – Japan
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- Testing- Germany
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- Unit-Test – Malaysia
- Utest – Turkey
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- Zahm & Nagel – USA