with the rapid development of science and technology, DNA detection and polymer analysis are becoming more and more important. ln order to maintain the original components and biological information of samples, it is necessary to adopt low-temperature pulverization. CryoGrinder LM200 chills the sample in liquid nitrogen and pulverize them with a magnetically driven impactor. The sample become brittle and the volatile components are preserved under the low temperature, so that a good grinding effect can be achieved. The automatic control function of liquid nitrogen content avoids the contact and danger of manual operation.

○  AppIication

lt is applied to samples with strong toughness and thermal sensitivity that are difficult to be ground and crushed at room temperature, such as rubber, plastic, food, mineral, animal and plant tissue analysis, drug, biochemical DNA detection, cell disruption and other fields.

○  TypicaI sampIe

polymers, rubber, textile materials, grain particles, hair, nails, skin, bones, muscle tissue， etc.

Working principIe

size reduction is taken place by electromagnetic oscillation impact. The sample and the metal impactor are loaded into the grinding jar together. The grinding jar is sealed with plug head by the two ends and put into the electromagnetic vibration drum coil. Electromagnetic coil with grinding jar immersed in liquid nitrogen to be pr-cooled. The whole grinding process is carried out in liquid nitrogen（-196 c). The magnetic force generated by the coil drives the impactor to move horizontally, thus continuously impact on then grind the sample that has been frozen and embrittled.

Features and advantages

O Electromagnetic vibration impact guarantees fast grinding speed, high precision, good uniformity and repeatability;

O The liquid nitrogen automatic filling system automatically supplement the liquid nitrogen consumed in the process of sample freezing and grinding to ensure the stability and safety;

O lndustrial touch screen control panel, impact frequency, pre-cooling time, impact grinding time, cycle grinding times can be set, easy to operate and reliable;

O safety design: when the cover of the instrument is open, the instrument cannot be started; only when the instrument cover is closed and locked can the instrument be started;

O streamlined and ergonomic design, simple and convenient operation;

O When the liquid nitrogen level is lower than the set value, the liquid sensor will alarm and automatically replenish the liquid nitrogen; and the instrument stops running to protect the electromagnetic coil fromdamage.

O Various specifications of grinding jar and impactor, suitabIe for a wider range of appIications

O provide different size grinding jars, satisfy the requirement of hard, medium hard, soft, brittle, elastic, fiber samples grinding.

O To achieve better grinding effect, the appropriate size of grinding jar should be selected according to the amount of the grinding sample. lt is suggested that the sample filling amount should be 5%-25% of the volume of the grinding jar（depending on different sample characteristics).

TechnicaI data

single grinding time	2min	Liquid nitrogen filling system	Manual/automatic optional
The shortest pre-cooling time	4.5min	lmpact frequency	5-15Hz
Batch capacity	0.1-100g	Rated power/power supply	1.9KW/220V，50/60Hz
pre-cooling chamber	400ml	lnstrument size	510*440*450mm
Grinding chamber	200ml	package size	870*720*750mm
Grinding jars	4groups（4x3二12pieces）jars of 3ml/4 jars of 20ml /one jar of 100ml/one  jar of 200m