Thermo Scientific HM 355S Automated Microtome
The HM 355S is a high-precision automated microtome for routine and research histology, capable of sectioning at 0.5-60 microns with cryogenic capabilities for frozen specimens. It includes ergonomic design and disposable blade compatibility for pathology workflows. Falls under HTS 9027.90.2000 as a dedicated microtome for physical tissue analysis.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If primarily marketed as cryostat with microtome function
Refrigerated microtomes (cryostats) classified by cooling function in 8418 per Chapter 90 exclusion notes.
If when importing microtome knives or cassettes separately
Accessories dedicated to microtomes go to 9027.90.4050 under Chapter 90 classification rules.
If for non-medical precision cutting machines
Medical-specific microtomes stay in Chapter 90; excludes technical uses per note 1(a).
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Import Tips & Compliance
• Provide histology lab end-use letters to prevent reclassification as general machinery
• Ensure CE marking or equivalent for quality compliance; include voltage specs for US compatibility
• Declare precise model details to distinguish from cryostats under 8418.69
Related Products under HTS 9027.90.20.00
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Microm HM 340E Rotary Microtome
The HM 340E is a manual rotary microtome for precise paraffin sectioning in research and clinical histology, with 50-60mm vertical stroke and 1-60 micron range. Its robust construction suits high-volume labs producing diagnostic slides. Properly classified in HTS 9027.90.2000 as a microtome for physical analysis.
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Boulder Ultramicrotome for Electron Microscopy
Designed for ultrathin sectioning (50nm-5μm) of specimens for transmission electron microscopy, the Boulder microtome uses diamond knives for nanoscale biological samples. Essential for cell biology and virology research. Classified under HTS 9027.90.2000 as specialized microtome for physical analysis.
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