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Milestone Rotor Technology

Flexibility and performance that make the difference

The SK-15 and the MAXI-44 new rotors feature the unique Milestone MDR technology for controlling the inner pressure of all vessels in complete safety. This 'vent- and reseal' approach (#ancora) for pressure release is the foundation of Milestone's leadership in microwave digestion.
The SK-15 and MAXI-44 offers both high quality digestion and high sample throughput.
A large selection of high purity quartz and TFM inserts are available for these rotors for smaller sample amounts or to minimize the dilution factor of the analytical solution.

MDR Rotor Technology

Two completely new rotors offering both high quality digestion and high sample throughput are available for the ETHOS UP. The SK-15 and the MAXI-44 feature the unique Milestone MDR technology for controlling the inner pressure of all vessels in complete safety. This 'vent- and reseal' approach (#ancora) for pressure release is the foundation of Milestone's leadership in microwave digestion.
Finally, a large selection of high purity quartz and TFM inserts (link) are available for the SK-15 and the MAXI-44 rotors for smaller sample amounts or to minimize the dilution factor of the analytical solution.

SK-15

High Pressure Rotor

The SK-15 is a high-pressure and high-temperature rotor featuring up to 15 TFM vessels with a volume of 100 ml and suitable for all applications. It ensures high quality digestion of even the most difficult and reactive samples, such as polymers, pharmaceuticals, alloys, geological materials and large sample amounts of food and feed with high fat content. The SK-15 rotor is fully compliant with commonly used standard methods, such as the US EPA 3015, 3051, and 3052.
  • High versatility and flexibility
  • High productivity even for challenging samples
  • Inherent ease of use

MAXI-44

High-throughput rotor

The MAXI-44 is a high-throughput rotor featuring up to 44 TFM vessels with a volume of 100 ml and suitable for a wide range of samples, typically environmental and food/feed. It is perfect for routine applications, as it combines an unmatchable ease of use with the highest sample turn-around-time available today from the market. The MAXI-44 is fully controlled by a contact less sensor to control the temperature and pressure of each vessel.
  • Unparalleled batch samples productivity
  • User friendly setup with only three components
  • Large volume, suitable for high volume digestions

Flexibility

With the comprehensive choice of rotors and accessories available, you can turn the ETHOS UP and ETHOS EASY into a versatile platform able to perform also solvent extraction, protein hydrolysis, vacuum evaporation and alkaline fusion.
  • Extraction rotor
    with 24 disposable glass vessels

    fastEX-24

    The fastEX-24 rotor extracts up to 30 grams of sample with minimal solvent volume. It uses disposable glass vials, eliminating the need for cleaning and the possibility of memory effect between different runs. The 100 mL vials can accommodate the extraction of a large sample amount.

    Read more

  • Medium-pressure digestion rotor
    14 TFM vessels

    MAXI-14

    14-position rotor with 100 mL TFM medium pressure vessels. Vent-and-reseal technology.
    Contact-less temperature control in all vessels.

    Read Brochure

  • High-pressure digestion rotor
    10 TFM vessels

    SK-10

    The high strength SK rotor body holds up to 10 digestion vessels made of high purity TFM. This rotor ensures complete digestion of any sample, including relatively difficult organic and inorganic refractory materials.
  • Medium-pressure digestion rotor
    12 TFM vessels

    SK-12

    The high strength SK rotor body holds up to 12 digestion vessels made of high purity TFM. This rotor ensures complete digestion of any sample, including relatively difficult organic and inorganic refractory materials.
  • Evaporation/Concentration rotor
    15 TFM vessels

    MMR-15

    The MMR-15 can be used for vacuum assisted sample drying prior digestion, and solution concentration at the end of the decomposition process. The MMR-15 accommodates up to 15 TFM vessels of 100 mL. They are the same vessels used in the SK-15 digestion rotor, so no transfer of the solution is required when performing drying and concentration. Microwave modular rotor that takes advantage of the US patent 5,447,077.

    Read Brochure

  • High-temperature muffle furnace
    up to 1200°C

    ultraFAST

    High-temperature muffle furnace suitable for fusions, up to 1200°C. A variety of difficult samples, such as cements, ores, slag, sediments, soils, rocks, ceramics, pigments, and glasses, can be successfully prepared for XRF, AA and ICP analysis.
  • Vessel-inside-vessel technology

    Ultratrace Inserts

    This configuration reduces the amount of acid required for digestion to near stoichiometric quantities, which reduces the dilution factor and improve the detection limit.

    Less acid volume
    Higher sample amount
    Lower dilution factor
    Increased method detection limit
    Less surface contamination
    Lower analytical blank

    Read more

Flexibility small

With the comprehensive choice of rotors and accessories available for the ETHOS UP, you can turn it into a platform able to perform also solvent extraction, protein hydrolysis, vacuum evaporation and alkaline fusion.
SK-10

SK-10

High-pressure digestion rotor
10 TFM vessels
SK-12

SK-12

Medium-pressure digestion rotor
12 TFM vessels
MAXI-14

MAXI-14

Medium-pressure digestion rotor
14 TFM vessels
MMR-15

MMR-15

Evaporation/Concentration rotor
15 TFM vessels
fastEX-24

fastEX-24

Extraction rotor
with 24 disposable glass vessels

Read more

ultraFAST

ultraFAST

High-temperature muffle furnace
up to 1200°C
Ultratrace Inserts

Ultratrace Inserts

Vessel-Inside-Vessel technology
to reduce the amount of acid required

Read more

Vessel Venting Technology

Patented "Vent-and-reseal" technology

Vent-and-reseal technology
All Milestone rotors feature an enhanced 'vent-and-reseal' technology for controlling the inner pressure of all vessels with complete safety. This patented (US Patent 5,270,010) technology provides the operator with unsurpassed safety and performance capabilities: highest temperature and pressure, highest safety standards, ease of use, and very fast cooling (180°C to 40°C in 10 minutes). While other systems use membranes or burst disks that render a vessel useless after venting, the Milestone system releases only the excess pressure from the vessel. This ensures that there is no stress to the door of the microwave system and no loss of sample as could happen in the case of a membrane or disk bursting. The illustration shows 'vent-and-reseal' in action: the vessel cap is held in place by a dome-shaped spring (1). In the case of over pressure due to a highly exothermic reaction, the spring is flattened, allowing the cap to lift up slightly (2) releasing excess pressure. Immediately the excess pressure is released, the spring reseals the vessel (3), and the digestion continues. There is no loss of sample and no clean up needed. The microwave program continues to completion and no re-run is required. While there are other methods of venting, only Milestone has 'vent-and-reseal' technology.
  • Superior performance
  • Higher safety and reliability
  • Low running costs

Self-regulating venting

The final method of venting is "self-regulating" and is used in the MAXI-44 rotor, and high-throughput rotors supplied by other manufacturers. These extreme throughput rotors were developed to address the needs of labs that process larger sample volumes on a routine basis. Self-regulating vessels are very easy to assemble/disassemble and rely on the Teflon sealing plug inside the cap deforming to release pressure. Their compact design results in more moderate temperature and pressure capabilities, but allows for a large number of vessels to fit onto the rotor. These characteristics make self-regulating rotors ideal for easy to moderate applications such as clinical, environmental, food, etc. Most recently, some manufacturers have applied the self-regulating approach to high pressure rotors designed specifically for more challenging sample types. Since self-regulating vessels are designed to vent, incomplete or unsatisfactory digestions may be observed given that the pressure loss does not allow the mandatory temperatures necessary for complete digestion to be achieved.

Other Method of Venting

There is another approach to venting, but it implies limitations compared to Milestone's Vent-and-Reseal and Self-regulating technology.
Burst Disk
This method employs a simple burst disk in the cap which is designed to fail in an over pressure situation, instantly releasing all pressure in the vessel. When this happens, instantaneous boiling occurs, the sample contents are lost and the run has to be manually stopped. Significant clean up of the cavity is required, and corrosion of the cavity and internal components will occur. The illustration compares the burst disk approach with 'vent-and-reseal': the red line shows the complete loss of pressure when a burst disk fails, and the whole run is stopped. The blue line shows what happens with Milestone's 'vent-and-reseal' technology: excess pressure is gently released at just over 30 bar, and the digestion continues to completion, with no loss of sample.
Burst Disk

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Surf on our online shop to find the components of each and every rotor and rack of our units.
Let´s find a solution that perfectly suits your specific needs.
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