• Fully-automatic Cryostat Microtome

Fully-automatic Cryostat Microtome


ST 550 is a fully-automatic cryostat microtome whose specimen forward and backward movement are controlled by motor. So it can get high quality section and easily operated.

  • It is designed under overall engineering and ergonomic concept. All the components are processed by computer numerical controlled machine.
  • Retraction function prevents specimen damage from blade.
  • Total thickness calculation.
  • The low temperature refrigeration system with environment friendly refrigerant R404.
  • Adopt UV and O3 sterilize for 30 minutes every time.
  • Peltier specimen clamp refrigeration may be turned on or off manually.
  • Two defrosting methods: manual and automatic.
  • Two running ways: manual and automatic.
  • Emergency stop function: Press the red button to stop running when any emergency happens.
  • The high precision unit is enclosed outside the cryostat chamber to prevent it from thermal expansion and contraction, and keep minimum maintenance requirement .
  • Artificial intelligent interface is easy for user to learn and operate.
  • LCD screen can display all information including thickness, thickness sum, controlling time, temperature, timed on/off and so on.
  • Sleep Function. After activating this function, the temperature in cryostat chamber can be kept between -1℃ and - 10℃; After stopping this function, the temperature in freeze chamber will arrive to working temperature within 30 minutes.
  • Control panel with locking function could avoid wrong operation.
  • Handwheel locking function.
  • Wide freezing shelf load 8 specimen cassettes simultaneously, and two of them are equipped with peltier to meet different temperature.





  • Freeze chamber minimum temperature:  -35℃±2℃
  • Freeze shelf minimum temperature: -45℃±5℃
  • Lowest temperature of Peltier unit on freeze shelf:-55℃±5℃
  • Lowest temperature of Peltier unit on Specimen Clamp:-50℃±5℃(working time of Peltier is 15 minutes.)
  • Maximum specimen size:35×35mm
  • Specimen vertical stroke:48±1mm
  • Specimen horizontal stroke:15±0.2mm
  • Coarse feeding speed:300μm/s (slow) or 900μm/s(rapid)
  • Section thickness range: 

   0μm~100μm adjustable;   
   0μm~3μm, in 0.5μm increments; 
   3μm~10μm, in 1μm increments; 
  10μm~20μm, in 2μm increments;   
  20μm~100μm, in 5μm increments;                             

  •  Trimming thickness range:

  10μm~600μm adjustable;
  10μm~50μm, in 5μm increments;
   50μm~100μm, in 10μm increments;
  100μm~600μm, in 50μm increments;

  • Retraction range: 0~80μm adjustable , in 5μm increments
  • Voltage and frequency:220 V ± 10% , 50 HZ / 110 V ± 10% , 60 HZ
  • Nominal Power: 1000 W
  • Weight: about 130 KG
  • Dimensions(W×D×H):805×715×1195mm