Moderate volume of the series, as required under static conditions, indoor or long-term storage of biological samples in liquid nitrogen to provide users the best choice. With static evaporation of liquid nitrogen is low, the use of economic advantages. Main features: ● using high-strength aluminum alloy; ● high vacuum multi-layer insulation design; ● Optional locking cover to protect the safety of the containers for the storage of samples; ● equipped with a protective cover to prevent the product in use bump bruises; ● life of not less than five years. Model Unit YDS-13 YDS-15 YDS-16 YDS-20 geometric volume L 13.0 16.00 17.0 20.0 Empty weight kg 7.0 8.2 8.5 11.2 Diameter mm 50 50 50 50 outside diameter mm 303 355 355 409 Height mm 600 600 620 650 static evaporation rate L / d 0.12 0.12 0.12 0.12 static preservation of d 109 134 143 168 Put tube diameter mm 38 38 38 38 mm tube height to mention the number 276 120 276 120/276 lift cylinder ea 6 6 6 6 thin tube capacity (single layer) 0.5 ml ea - 792 - 792 0.25ml ea - 1788 - 1788 thin tube capacity (double) 0.5ml ea 1284 - 1284 1284 0.25ml ea 2832 - 2834 2832 Optional lock cover sheet √ √ √ √