Cryo Preparation Systems

Quick reference

Quote Request

    K850 Critical Point Dryer

    The K850 combines versatility and ease of operation. Built-in thermo-electric heating and adiabatic cooling allow precise temperature control. The vertical pressure chamber (32 mm diameter x 47 mm) has a side viewing port, which gives a clear view of the liquid meniscus during filling. A magnetic stirrer ensures optimal mixing and exchange of process fluids.

    Key features

    • Vertical chamber with top filling and bottom draining
    • Side viewing port – good visibility
    • Built-in adiabatic cooling and thermoelectric heating – accurate temperature control
    • Fine-control needle valve pressure let down – precise control of decompression avoids potential damage to specimens by uncontrolled pressure release
    • Built-in magnetic stirrer- enhanced solvent exchange
    • Pressure monitoring with safety cut-out for over pressure
    • Extended warranty option

    Click here for the product brochure download

    • Product Description
    • Images
    • Ordering information
    • Additional Information
    • Downloads & Specifications

    The K850 Critical Point Dryer is fitted with thermo-electronic heating and adiabatic cooling and temperature control of +5°C cooling and +35°C during heating. This allows pre-cooling of the chamber and ensures that the critical point is accurately obtained.

    The K850 is fitted with three valves: fluid inlet, flushing and a gas venting system which uses a fine needle valve to give controlled pressure let down at the end of the critical point drying process.

    A built-in magnetic stirrer ensures thorough mixing of specimens with circulating fluids.

    Specimen holders

    The standard specimen holder has 12 individual wells (8 mm diameter x 8 mm high) and allows easy exchange and transfer to and from the K850. For larger specimens the optional EK4150 bulk specimen holder (a single large specimen container) is recommended.

    For critical point drying very small or delicate specimens the optional CPD800A porous pots are available.

    For further details see: Ordering Information.

    This product is for Research Use Only.


    No. K850240V or K850110V

    K850 Critical Point Dryer

    Supplied with a  AL800019-1 specimen holder.

    Options and Accessories

    AL800019-1. Standard 12 specimen holder with 12 individual specimen wells (each 8 mm Ø x 8 mm H).

    EK4140. TEM grid holder.

    EK4135. Glass microscope slide holder.

    EK4130. Holder for bulk specimens (a single large container).

    CPD800A. Porous specimen pots.

    K850 Critical Point Dryer


    Vertical chamber 32 mm Ø 47 mm H with glass viewing port and safety shield.

    Magnetic stirrer located under the base of the chamber.

    Controllable adiabatic cooling and heating with digital read out.

    CO2 inlet valve, flushing valve and venting system and high pressure CO2 coupling hose.

    AL800019-1 specimen holder.

    Operating manual.

    Options and accessories

    AL800019-1. Standard 12 specimen holder. Has 12 individual specimen wells. each 8 mm Ø x 8 mm H.

    EK4140. TEM grid holder.

    EK4135. Glass microscope slide holder.

    EK4130. Holder for bulk specimens (a single large specimen container).

    CPD800A. Porous specimen pots.



    Judges House, Lewes Road,
    Laughton, East Sussex.
    BN8 6BN

    +44 1323 810981

    [email protected]


    Working Hours

    8.30 – 5.00 pm Mon – Thu
    8.30 – 4.00 pm Fri

    Follow Our Socials

    Keeping in contact with our customers via social platforms as well as traditional telephone and email.