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The Fully Automatic Liquid Nitrogen Knife Mill is a high-capacity cryogenic grinder designed for operation in liquid nitrogen environments. It utilizes liquid nitrogen injection to rapidly embrittle samples, ensuring excellent homogeneity and reproducible preparation results.
Product Details
The Fully Automatic Liquid Nitrogen Knife Mill is a high-capacity cryogenic grinder designed for operation in liquid nitrogen environments. It utilizes liquid nitrogen injection to rapidly embrittle samples, ensuring excellent homogeneity and reproducible preparation results.
Integrating automatic nitrogen filling, low-speed shear mixing, and high-speed grinding, it is the ideal instrument for processing food samples with high fat, high sugar, or high toughness.
Application
Analysis of organic pollutants (pesticide residues) in food.
Grinds a wide range of dry and wet samples, from soft fruits (e.g., watermelon) to muscle tissues and hard materials.

Sample Types
Fruits, vegetables, seeds, animal tissues, etc.
Working Principle
The instrument features a two-leaf blade assembly centrally located at the bottom of the grinding jar. Driven by a high-performance motor, the blades rotate with a fixed height interval. The sharp steel edges ensure reliable crushing and homogenization. Depending on the rotation direction, the blunt side can be selected for coarse crushing of large samples, while the sharp side is used for fine grinding.
Features
High Throughput: Processes up to 1kg of sample per run (grinding capacity up to 5L).
Rapid Processing: High-speed grinding ensures quick sample preparation in a short time.
Versatile Use: Compatible with both liquid nitrogen and dry ice for sample cooling.
Full Automation: Automatic liquid nitrogen filling for hands-free operation.
Technical Specifications
Model | WCKM500 |
Feed size | < 40 mm |
Final fineness | < 300 μm |
Mixing speed | 200 rpm |
Speed range | 500-3600 rpm, digital display, continuously adjustable |
Sample quantity | 1 kg |
Grinding jar volume | ≥ 5 L |
Grinding mode | Cryogenic grinding / Room temperature grinding |
Cooling method | Liquid nitrogen / Dry ice cooling, automatic LN2 addition |
Control mode | Color touch screen, 20 sets of program storage |
Communication interface | RS232/USB, connectable to PC for data export |
Sample properties | Dry, soft, elastic, fibrous, medium-hard, aqueous, oily, fatty, etc. |
Blade material | Stainless steel, Titanium |
Number of blades | 2 |
Rated power | 2 kW |
+86 21 51096910
sales@welsobio.com
marketing@welsobio.com
1-1009, National Industrial Design Park, No. 599 Jianzhu Road, Binhu, Wuxi , Jiangsu, China, 214062
Head Office: No. 439 Jinglian Road, Minhang District, Shanghai,China, 201108