Cole-Parmer® SamplePrep CG-400 Freezer/Mill® Large Cryogenic Grinder

• Reach cryogenic temperatures in minutes.
• Equipped with liquid nitrogen (LN) level sensor that shuts shuts down the mill if LN level is too low. Liquid nitrogen required for operation.
• Lid safety interlock for operator protection prevents mill from running if lid is not latched shut.
• Grinding chamber holds one large grinding vial, one mid-size vial, four standard grinding vials, or four microvial sets.
• Auto-fill system available for automated filling with liquid nitrogen (order model 6875A Freezer/Mill).
• Touchscreen stores up to 20 user-defined grinding programs for quick and easy recall, includes run history, training videos, and manuals.
• Maintenance-free design with only one moving part.
• 1 year warranty.

The Cole-Parmer® SamplePrep CG-400 Freezer/Mill preserves sample integrity by maintaining cryogenic temperatures with continuous liquid nitrogen immersion, preventing degradation of heat-sensitive compounds like metabolites and isomers. Since the vial is securely closed the integrity of its contents is maintained, hazardous or critical samples are easily controlled, and cross-sample contamination is eliminated.

The Freezer/Mill accommodates samples ranging from 0.1 to 50 grams with multiple vial options for different sample sizes, and works with various vial materials including polycarbonate, stainless steel, and low-chrome steel.

Our proven technology uses a dual electromagnetic grinding chamber that rapidly drives a steel impactor back and forth against the two end plugs of the sample vial and pre-cools and pulverizes samples in one seamless step. An optional auto-fill system is available to automate liquid nitrogen refills for added convenience.

The CG-400 is built for safety and longevity. The liquid nitrogen sensor prevents damage by ensuring proper cooling during operation, shutting down the mill if the liquid nitrogen level is too low. The Cole-Parmer SamplePrep Freezer/Mill is designed for use in an open, well-ventilated workspace to avoid condensation-related issues. Cryogenic gloves and safety gear are recommended for safe handling.