N-EVAP Nitrogen Evaporator Configurations and Options

    These popular instruments are ideal for someone who is working with sample tubes of various sizes, as these laboratory evaporators can accommodate different sized sample vials simultaneously.  These instruments are available in 6, 12, 20, 24, 34 and 45 positions.  They can be Teflon coated for those working with corrosive solvents that may damage stainless steel.  The instrument has many optional features which allow the N-EVAP to be ideal for almost any evaporative sample preparation process. 

    Heating Unit:

    • Water bath -A water bath is the most common choice and is what comes standard with an N-EVAP. It can heat samples to 30-90°C, and provides the most even heating.
    • Dry bath (-DA option) is for samples with a higher evaporation temperature, as it heats aluminum or glass beads to 40-130°C.  It can also be used for samples that are water sensitive, or for samples with labels that are water soluble. For more information, check out this blog post on the differences between a water and a dry bath
    • No bath (-O option) is for samples that evaporate at ambient temperature.  Instead of a heated bath, the instrument comes with a base and stand assembly.
    • Bath for Flammable Solvents (-Z option) is recommended for use with flammable solvents.  This option is offered for labs that work with highly flammable materials.  The Z-purge (-Z) reduces the classification from Division 2 (Zone 2) to unclassified/nonhazardous.  Purging is a world-wide accepted protection concept from explosion.  Explosion protection is achieved by keeping the potentially explosive atmosphere away from any source of ignition.  A small flow of nitrogen into the bath pan creates a slight positive pressure gradient inside the bath case. As the nitrogen leaks back out, the bath is continually purged. Highly flammable materials such as petroleum ether, ethyl ether and acetaldehyde should not be used unless the Type-Z Purge positive pressure bath option is installed and running.


    • We sell instruments all over the world, and therefore we can build your instrument for the correct wiring for your lab, no matter where you are located.  Wiring other than the standard US 110v requires cat# -2 option.  There are many different types of plugs.  North America, Europe, China and India all have their own type of plug--- and we can build them all.

    Acid Resistant Coating:

    • Polytetrafluoroethylene, PTFE, also known as Teflon Coating (-RT) is available for all N-EVAPs and can resist almost all corrosive solvents including organic solvents, acid and base.  Without this protective coating the use of very acidic or basic materials can damage the instrument, and is not recommended.  However, with this coating in place, the N-EVAPs can handle the use of corrosive solvents indefinitely, extending the life of the instrument.

    Pasteur Pipet Adaptors:

    • For those that would rather use their own pipets rather than needles, pipet adaptors (NA0636 or NA0637) make pipets compatible with our instruments.  Because Pasteur Pipets are considered disposable, this option is for those looking for their nitrogen blowdown vehicle to have a one-time use option.


    Don't know which configurations are best for your application? Check out our solvent compatibility table to see our recommendations.


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