Cryogenic grinding – Freezer/Mill®

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SPEX Europe‘s Freezer/Mill® is a programmable cryogenic mill specifically designed for grinding and pulverizing tough or temperature sensitive samples. Samples are placed in a sealed cryogenic grinding vial then immersed in liquid nitrogen (LN). The samples are cooled to cryogenic temperatures then pulverized by magnetically shuttling a steel impactor back and forth against two stationary end plugs. Each Freezer/Mill® cryogenic grinder has an insulated nitrogen tub equipped with an LN sensor. A touch screen control panel controls the grinding cycles, grinding time, impact rate as well as pre-cooling and cooling times.

Since the vial is closed, the cryogenic grinder maintains integrity of its contents, hazardous or critical samples are easily controlled, cleanup is simplified and cross-sample contamination is eliminated.

The mill is programmable and stores up to 20 user-defined grinding programs.

Because breaking up is hard to do…

Scroll further on this page for an overview of the different models of Freezer/Mills.

Examples from ‘before’ and ‘after’ grinding:

Polyethylene granules

milled Polyethylene granules

Potato

milled potato

Since the vial is locked, the integrity of the content remains intact; dangerous or critical samples can therefore easily be processed. Cleaning is simplified and cross-contamination is excluded.

These features make the SPEX Sample Prep Freezer/Mills the world’s most effective cryogenic grinders.

SPEX SamplePrep has 3 models available. Scroll down for information about these models. Which model is suitable for your application depends, among other things, on the size of the sample you want to pulverize and also the number of samples.

Freezer/Mill Grinding Vial Guide
Freezer/Mill
Microvial, set van 3 (0.1G – 0.5G ieder)Small Vial (0.1G – 5GMedium Vial (1 – 40G)Large Vial (1 – 100G)
6775 Freezer/Mill
1 set (3 total)1N/AN/A
6875 Freezer/Mill4 sets (12 total)411
6875D Freezer/Mill
8 sets (24 total822

6775 Freezer/Mill®

A small Cryogenic Mill with an integrated liquid nitrogen reservoir and insulated housing that processes samples between 0.1 – 5 grams. It is specifically designed for cryogenic grinding and pulverization of tough and/or temperature sensitive samples in a sealed vial that remains submerged in liquid nitrogen.

  • Via Touch Screen storage up to 20 user-defined grinding programs that are easily and quickly retrievable. Also included are run history, training videos, manuals and accessores.
  • Grinds samples between 0.1 – 5 grams. The grinding chamber holds one microvial set or one small grinding set.
  • Grinding Vials Sets are available in a variety of materials, including polycarbonate, stainless steel and Cr-free condition.
  • Liquid nitrogen is required

6875 Freezer/Mill®

A larger Cryogenic Mill with an integrated liquid nitrogen reservoir and insulated housing. Optionally, an automatic filling system is available to automatically fill the reservoir with liquid nitrogen. It pulverizes samples from 0.1 – 100 grams. It uses 1 large vial, 4 small vials or 4 Microvial sets.

  • Via Touch Screen storage up to 20 user-defined grinding programs that can be called up quickly and easily. Also included are run history, training videos, manuals and accessores.
  • Grinds samples between 0.1 – 100 grams. The grinding chamber holds one microvial set or one small grinding set.
  • Grinding Vials Sets are available in a variety of materials, including polycarbonate, stainless steel and Cr-free.
  • Liquid nitrogen is required.

6875D Freezer/Mill® – greater throughput

A Cryogenic Mill for processing a larger number of samples. It has two chambers with an integrated liquid nitrogen reservoir and insulated housing.  It pulverizes samples of 0.1 – 200 grams (100 per grinding chamber).

  • Supplied as standard with an automatic filling system that automatically fills the reservoir with liquid nitrogen.
  • Via Touch Screen storage up to 20 user-defined grinding programs that are easily and quickly retrievable. Also included are run history, training videos, manuals and accessores.
  • Two grinding chambers can hold a total of 200 grams (2 x 100 grams)
  • Maintenance-free design with only one moving part.

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