Mixer mill MM 500 CONTROL

The MM 500 control is a high energy laboratory ball mill that can be used for dry, wet and cryogenic grinding with a frequency of up to 30 Hz. It is the first mixer mill in the market that allows to monitor and control the temperature of a grinding process.

THE ONLY MIXER MILL WITH TEMPERATURE CONTROL

• Max. speed 30 Hz
• Horizontal oscillation causes strong impact effects for effective sample processing
• Up to 10 mm feed size and 0.1 µm final fineness
• 2 grinding stations for jars of min. 2 ml and max. 125 ml, adapter for 18 x 2 ml single use vials
• Various possibilities for heating or cooling with thermal fluid or liquid nitrogen for cryogenic grinding, temperature regulation between -100 °C and 100 °C, monitoring of temperature
• GrindControl to measure temperature and pressure inside the jar.
• Aeriation lids to control the atmosphere inside the jar
• Bench top model, touch screen, easy jar clamping, jars can stay clamped for subsampling, storable SOPs and cycle programs, 4 different jar materials for dry and wet grinding

ADVANTAGES THROUGH DESIGN

Dry, wet and cryogenic grinding with up to 30 Hz for high energy grinding

• Fast and comfortable sample processing with two screw lock jars of up to 125 ml each
• Patented hermetically closed fluid system ensures the safe operation of thermal fluids
• Wide range of accessories available, including ventilation lids and heavy-metal-free grinding jars (also for cryogenic grinding)
• Ergonomic jar clamping, low noise level, user friendly parameter setting via touch display

TEMPERATURE MONITORING AND CONTROL

• Continuous temperature monitoring throughout a grinding process
• Cooling and heating in a range from - 100 to 100 °C
• Operation is possible with liquid nitrogen or other thermal fluid
• High flexibility in terms of selecting a tempering device for temperature regulation (LN2 supply, cryostat, chiller, …).
• Low temperature grinding is possible without LN2

CRYOPAD

• Extension device cryoPad is required for the operation with LN2
• The cryoPad regulates the flow of LN2 through the thermal plate
• The cryoPad technology allows to select and maintain a specific cooling temperature in the range between - 100 and 0 °C while using LN2

TEMPERATURE REGULATION BASED ON THERMAL PLATES

The cooling and heating of the sample material is realized with the patented concept of thermal plates, making sample cooling with, e. g., open liquid nitrogen baths or dry ice obsolete. For tempering, the grinding jars are simply placed on top of the thermal plates. When the grinding jars come in contact with the thermal plates, heat is effectively transferred from or to the jars via the tempering device. The patented hermetically sealed fluid design allows to operate the mill with different thermal fluids, ensuring a flexible and safe temperature regulation and requiring only minimal effort for the user. Depending on the operational setup that is built up, the temperature of the thermal plates can be set in the range from - 100 to + 100 °C.

CONFIGURATIONS

To control the temperature of a grinding process, the mill needs to be connected to an external tempering device. Basically, there are two options:

1. Temperature regulation with liquid nitrogen

The mill is operated with liquid nitrogen and connected to a nitrogen tank. In this setup the mill must be extended with the optionally available extension device cryoPad. The patented PID (proportional–integral–derivative) system of the cryoPad controls the flow of liquid nitrogen and herewith the temperature of the thermal plates. In this setup, it is possible to select and maintain the temperature of the thermal plates at a specific value. The desired temperature is adjusted via the touch display and can be selected within a range from - 100 to 0 °C, in steps of 10.

Setup 1: Extension device cryoPad and LN2 tank for the operation with liquid nitrogen.

2. Cooling or heating with a liquid thermal fluid

In this setup, the mill can either be connected to a cryostat, to a chiller or to the water tap. The external tempering device regulates the corresponding thermal fluid to a defined temperature and the thermal fluid transfers this temperature to the thermal plates. As during a grinding process, a significant amount of heat may also develop inside the jar, the temperature of the thermal plates may be manipulated. To sum up, the actual temperature of the thermal plates depends on both, on the temperature of the thermal fluid and on grinding parameters, like frequency, time, jar volume, size of grinding balls. For a maximum control of the grinding process, the actual temperature of the thermal plates is continuously monitored in the touch display.

Setup 2: Operation with an external tempering device; e.g. water tap, chiller or thermostat.

APPLICATION EXAMPLES

• Preserving temperature-sensitive analytes (like volatile substances or pharmaceutical and food ingredients)
• Embrittlement
• Wet grinding below room temperature
• Mechanochemistry

• Paste making (in food industry)
• Intensifying mechanochemical reactions

TYPICAL SAMPLE MATERIALS

TECHNICAL DATA

FUNCTIONAL PRINCIPLE