High-Quality, American-Made Lab Equipment


    45 Position N-EVAP
    Nitrogen Evaporator


    Our 45-position nitrogen evaporator (Catalog # 11645) offers the largest number of sample positions in our N-EVAP line. The sample holder has dual circular rings. The outer ring has 30 positions and can accommodate samples with an outside diameter of 10-19 mm The inner ring has 15 positions and can accommodate samples with an outside diameter of 16-30 mm and a minimum height of 70 mm. 

    This time-tested, durable system provides the least expensive price per position of all our N-EVAPs. The evaporative system, along with the standard flow control and pressure reducing regulator, enables the operator to achieve the desired level of concentration with efficient nitrogen usage. Our unique dual band spring hoist assembly ensures easy and effective operator use. Additionally, the 45 position N-EVAP includes a side control box. Timed, digitally controlled water bath temperatures provide even evaporation rates. The pressure regulator and timer combine to allow timed automatic gas flow cut off which slows evaporation to a minimum once the timed cycle has been completed. The heat can also be shut off with the gas after a timed cycle.


    N-EVAP nitrogen evaporators combine nitrogen blow down with a heated bath to gently concentrate delicate samples


    An adjustable sample holder design fits a wide variety of sample tubes and vials at once


    Digital controls allow exact temperature regulation

    Individualized Control

    Optimize evaporation of diverse samples with individual gas flow control at each vial

    HubSpot Video


    • Nitrogen filter

    • Adjustable flow meter, 0-30 lpm

    • Built-in pressure reducing regulator

    • Side control box

    • Digital temperature controller

    • Electronic timer

    • Safety control cover plate

    • High pressure phthalate free tubing

    • High temperature limit switch for safety

    • Dual band spring hoist assembly (except in dry bath model)

    • Precision needle valve tube assembly

    • Needles, 4-inch x 19 gauge with brass plated hub and stainless-steel shaft


    • 220v wiring harness (Option Code# -2) 

    • Z-Purge/positive pressure purge case (Option Code# -Z) 

    • Acid resistant coating on instrument and needles (Option Code# -RT)


    Sarah & Connor CTA


    Instrumental Name 45 Position N-EVAP 45 Position N-EVAP
    Bath Type Water None
    Instrumental Catalog Number 11645 11645-O
    Number of Sample Positions 45 45
    Overall Dimension (w x d x h) 24 x 19 x 34 in
    61 x 48 x 86 cm
    24 x 19 x 32 in
    61 x 48 x 81 cm
    Sample Holder Layout Circular Circular
    Gas Manifold Layout Dual Rings Dual Rings
    Outer Circle Sample Holder Test Tube Range 10-19mm OD 10-19mm OD
    Inner Circle Sample Holder Test Tube Range 16-30 mm OD; >70 mm height 16-30 mm OD; 70 mm height
    Gas Flow Meter 0-30 L/min 0-30 L/min
    Stainless Steel Needles (Length & Gauge) 4.0 in x 19 ga
    102 mm x 19 ga
    4.0 in x 19 ga
    102 mm x 19 ga
    Sample Tray Lift Mechanism Dual Band Spring Hoist Assembly Dual Band Spring Hoist Assembly
    Rotating, Leak Tight Gas Fitting Standard Standard
    Built-in Nitrogen Gauge Input 30-110 psig 30-110 psig
    Acid Resistant Coating Optional Optional
    Heating Device Specs
    Model Number
    13165 N/A
    Heating Medium Water None
    Inside Dimensions (Diameter x Depth) 16.0 x 4.5 in
    40.6 x 11.4 cm
    Outside Dimensions (w x d x h) 24 x 19 x 6 in
    61 x 48 x 15 cm
    Total Wattage 1300 W N/A
    Bath Temperature Range 30-90 °C N/A
    Temperature Controller Type
    Digital Electronic with LED Display N/A
    Controller Accuracy +/- 2 °C N/A
    Side Mount Control Box with Timer for Nitrogen & Heat Standard N/A



    Catalog Number Bath Type
    116455 Water Bath
    11645-O No Bath*

    *All “-O” models come with a base and stand assembly instead of a heated bath. These instruments are designed for evaporation procedures performed at ambient temperature.


    • Nitrogen generator (cat# NA1955)

    • Pasteur pipette adapters (cat# NA0636)

    • High temperature silicone fluid (cat# NA1240)

    • Various needle sizes and gauges


    • P0627: Valve Tube Assembly – Post 1997

    • P0607: Luer & washer for N-EVAP valve tube

    • P0634: Tube Fitting nylon 3 part for N-EVAP valve tube