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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


  • 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

OPTIONS (Add to main Cat# when purchasing)

  • 220v wiring harness (Option Code# -2), Cat# 11645-2

  • Z-Purge/positive pressure purge case (Option Code# -Z), Cat# 11645-Z

  • Acid resistant coating on instrument and needles (Option Code# -RT), Cat# 11645-RT





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


Sarah & Connor CTA


Catalog Number Bath Type
11645 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