• 301 Norhof LN2 Injector System
  • 600 Series Automatic Closup
  • 600 Automatic With Laptop Closup

301 LN2 injector

Specifications and Options


Norhof LN2 microdosing systems

Liquid Nitrogen (LN2) is used as the cooling medium and is taken from a storage vessel (Dewar) with low pressure (max. 300 mBar) and delivered (pumped) through a fill line to the application in a micro dosing way.

The Norhof LN2 microdosing system is designed to overcome the drawbacks of LN2 under pressure in which a solenoid valve is used to switch the supply ON / OFF. You may compare the Norhof system with a water tap, but instead of giving water, it gently gives liquid nitrogen, with an adjustable flow, possible to regulate from some drops, up to 1 Liter/minute. Our pump can pump LN2 up to 5 meters above the pump itself

The reservoir Dewar can safely stand next to your working place. When you need a small amount of LN2, the system is ready to supply by only pressing on the pump head. By pressing on the pump head, the system starts building a small over pressure, forcing the liquid gently to rise into the fill line, and fall into your little Dewar, or other small LN2 container. After your pressure on the pump head is released, the system shuts off automatically, and the flow stops.

Working principle

The pressure above the liquid level inside the Dewar is built by heating a small amount of liquid in the bottom of the Dewar. With only up to 100 mBar of over-pressure, the liquid will gentle rise out of the rise pipe and fall into the fill hose. Because we evaporate some LN2 to build pressure, there is no adding of ice inside the Dewar, such as with manual systems which use air from the environment.

When LN2 is required, a small overpressure is generated by a small heater element in the LN2, and liquid flows out of the system like water from a tap, without spilling, noise, vibrations etc.

301 series Technical Specifications

Static evaporation rate  2 liters/day
Dosing quantity per dose  0,08 to 0,5 mL. (with 1,5 mm nozzle)
Working LN2 pressure < 20 mBar
Power connection 115V / 230V AC with supplied power supply or 12 Volt AC/DC
Power consumption average 10 Watts, during pumping max. 50 watts
Storage container volume 50 Liter 100 Liter
Outside dimensions (round) 500 500 mm
Height dimensions (incl. pump) 875 1235 mm
Weight (empty, full) 17 / 51,5 kg 32 / 113 kg
System includes  Power supply, controller, all cables etc.
Options  trolley, floorstand for pump

Norhof pump stand

Norhof power transformer

Norhof Trolley

50 liter Dewar with trolley

50 liter Dewar with trolley strapped

50 liter Dewar

100 liter Dewar

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