Join Our Network of Distributors Worldwide
Live Help
Quality Products since 1976

Bright OTF5000 Cryostat


Based on the long-established and reliable OTF/AS cryostat, the new OTF5000 brings the extensive range of Bright cryostats completely up to date. New styling coupled with improved user ergonomics, the latest blade systems in the ever-reliable and powerful 5040 microtome, a huge choice of options plus money-saving package deals make these cryostats absolutely unique.
They are suitable for an endless range of applications and, in the correct configuration, are capable of cutting a wide diversity of specimens from undecalcified bone to brain. Allowing full anti-roll plate adjustment for perfect results coupled with long lasting temperature stability, the OTF5000 can truly be described as the complete cryostat.

OTF5000 Series Features:

  • New contoured top for added operator comfort and usability
  • Suitable for research and clinical operation
  • 2 money-saving special packages loaded with added features are available (LS & HS models)
  • Uses solid knives or disposable blades
  • Automatic evaporator defrost supplied as standard
  • Long list of options and accessories

OTF5000 cryostats are available fitted with either a standard knife holder or with a Quick Release FeatherT Blade Holder. The Quick Release FeatherT Blade Holder can be easily changed for the standard knife holder and vice versa.
Standard Knife Holder

Quick Release Feather Blade Holder

For users wishing to use both standard blades and FeatherT blades, a Lever Release FeatherT Blade Holder is available as an accessory (Product #527842).

This fits easily into a standard knife holder. The low profile blade can be easily and safely changed without removing the blade holder from the knife holder.


The OTF5000 has at its heart the Bright 5040 microtome. This classic design copes with high cutting loads and yet performs very favorably under conditions of low temperature. The 5040 has a unique construction. By incorporating thin flexible beryllium hinges, the movement of the top arm of the microtome is strictly controlled. The design eliminates any expansion or contraction problems that might arise as a result of the large range of temperature changes which take place in a cryostat.

The mechanical pawl and ratchet wheel system guarantees accurate head advance ensuring reproducibility of section thickness.

The OTF5000 incorporates a 'quick freeze' bar. This quick freezer can accommodate 5 x 22mm diameter object holders and 4 x 37mm object holders in the positions provided. The temperature of the freeze bar is approximately 10 °C lower than the chamber temperature.

OTF-5000 Standard Model, with standard knife holder and optional fine object orientation.
(Fine object orientation is included on all LS and HS models)

Options & Accessories


The OTF5000 is available in 3 configurations (Standard, LS, and HS). All configurations can be equipped with either the Quick Release Feather Blade Holder (complete with anti-roll plates and ten Feather blades) or a Standard Knife Block and Standard Knife Set.

Standard Model

  • Quick freezer
  • Evaporator defrost
  • 5040 microtome with fixed head
  • Window demist system
  • Side mounted non-urgent controls
  • Internal shelves
  • Manual cutting system
  • Heated window surround
  • Analog defrost clock
  • Full set of accessories

LS Model
LS models, in addition to the items included in the Standard specification, also have:

  • Fine object orientation
  • Motorized advance/rewind (2 speed) 116µm/s and 164µm/s with auto-reset
  • Specimen temperature control, fast reacting from -5°C to minimum chamber temperature.
  • Microprocessor control and LED display

HS Model
HS models, in addition to the items included in the LS specification, also have:

  • Section counter, 6 digit LCD display
  • Dual refrigeration with auto compressor switch over for -40 °C chamber temperature
  • Motor drive for automation of cutting process, with variable speed control. Footswitch operation is standard on the HS mode

Model Style Blade Holder Style Price / Pkg Quantity
527506 OTF5000-002 Standard Standard Knife Set

527508 OTF5000-002 LS Standard Knife Set

527510 OTF5000-002 HS Standard Knife Set

527518 OTF5000-004 Standard Feather Blade System

527520 OTF5000-004 LS Feather Blade System

527522 OTF5000-004 HS Feather Blade System