cryostat-cut section preserves cell density and tissue architecture

Fully-automatic Cryostat Microtome

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Why buy from Geneq? - find out more

ST 550 is a fully-automatic cryostat microtome whose specimen's forward and backward movements are controlled by the motor

So it can get high-quality sections and easily operated.

  • It is designed under overall engineering and ergonomic concept. All the components are processed by a computer numerical controlled machine.
  • The retraction function prevents specimen damage from the blade.
  • Total thickness calculation.
  • The low-temperature refrigeration system with environment-friendly refrigerant R404.
  • Adopt UV and O3 sterilization 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 .
  • An artificial intelligent interface is easy for users 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 the freeze chamber will arrive at a working temperature within 30 minutes.
  • Control panel with a locking function could avoid wrong operation.
  • Handwheel locking function.
  • Wide freezing shelf loads 8 specimen cassettes simultaneously, and two of them are equipped with a peltier to meet different temperatures.




  • 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