Microm HM500 OM Motorized Cryostat Microtome 115V Cat 952350 w/ Blades Pedal

Microm HM500 OM Motorized Cryostat Microtome 115V Cat 952350 w/ Blades Pedal

The Microm GmbH HM500 OM is a floor-standing motorized cryostat microtome designed for the preparation of frozen tissue sections. The "OM" designation denotes the motorized (Oriented Motor) drive system, which automates the sectioning stroke for consistent, reproducible thin sections without manual wheel operation. The unit integrates a cryogenic chamber — cooled with R 404a refrigerant — that maintains the specimen and the cutting environment at the required sub-zero temperatures for frozen sectioning. The digital control panel provides independent display and adjustment of box temperature and object temperature, plus section counter, trim/feed settings, sectioning mode selection, and a motorized start/stop function. A manual hand wheel on the left side provides coarse specimen advance for trimming.

Specifications & What's Included

• Manufacturer: Microm GmbH, Walldorf, Germany
• Model: HM 500 OM (Motorized Cryostat Microtome)
• Catalog No.: 952350
• Power: 115V ±10%, 60Hz, 16A
• Refrigerant: R 404a — Chamber charge 0.350 kg, Specimen charge 0.120 kg
• Max. refrigerant pressure: 2300 kPa (chamber and specimen)
• Drive: Motorized sectioning (OM) with manual hand-wheel for coarse advance
• Control panel: Digital displays for Box Temperature (°C) and Object Temperature (°C), Section Counter, Trim/Feed setting; Freeze Object, Defrost Time, Interrupt, Mode, Lock, Start/Stop, and emergency stop controls
• Compatible blade type: 185mm C-Profile knives
• Included — Leica 185mm C-Profile cryostat knife, PN 021608573 (Code B42710, in original plastic case)
• Included — C-Profile 185mm knife, PN 9992011 (in original wooden box; note on box reads "not facet c-35°")
• Included — Two Dorn & Hart Microedge 185mm C-profile blades (in plastic case)
• Included — Specimen chuck/holder mounting plate with multiple circular and square specimen mount recesses
• Included — Treadlite II foot pedal (cable-connected; note: rubber pad is heavily worn/cracked and may need replacement)
• Included — White 3-prong power cord
• Included — Small Leica "16 cm/c" specimen cassette accessory
• Made in Germany

Applications

Cryostat microtomes like the Microm HM500 OM are standard instruments in histopathology and pathology laboratories. Their primary role is the preparation of frozen tissue sections — typically 5–20 µm thick — for rapid intraoperative diagnosis ("frozen sections" requested during surgery), as well as for immunofluorescence, immunohistochemistry, and other techniques where chemical fixation must be avoided. The motorized drive of the HM500 OM is particularly valued in high-volume pathology settings where consistent section thickness and operator fatigue reduction matter. Microm GmbH, based in Walldorf, Germany, has been a leading manufacturer of laboratory microtomes and cryostats; their HM-series cryostats were widely adopted in hospital pathology departments, academic medical centers, and research institutions throughout the 1990s and 2000s. The HM500 OM competes in the same class as instruments from Leica (CM series) and Thermo Scientific (Shandon cryostats), and accepts standard 185mm C-profile microtome knives compatible with blades from Leica, Dorn & Hart, and other suppliers.