Nitrogen Dosers

How does nitrogen dosing work?

Based on the physical characteristic that one part of liquid nitrogen warms and expands into 700 parts of gaseous nitrogen at ambient temperature, Chart's automated dosers dispense a precisely measured dose of liquid nitrogen (LN2) into each container prior to sealing.

Reducing waste and cost one drop at a time

The trapped liquid nitrogen vaporizes, creating pressure, and adding rigidity to the container – allowing for a thinner container wall.  For preservation and modified atmosphere packaging (MAP) applications, the rapidly expanding gas is allowed to escape before the product is sealed, flushing out oxygen, and extending product shelf life.

nitrogen dosing reduces waste

Using Chart dosing technology in their production lines enables a vegetable oil producer to use lightweight PET bottles saving >700,000 kg of plastic. That's the equivalent of 24 adult humpback whales.

Complete Turnkey Solution

From initial design to a complete after-sales package, we work closely with our customers to ensure that the complete system is engineered and built in accordance with their requirements and always operating at peak efficiency. Chart delivers the highest levels of performance at the lowest operating cost with single source accountability for your project.

  1. Storage: complete range of liquid nitrogen storage options including portable cylinders, MicroBulk systems and bulk tanks.
  2. Withdrawal: a vacuum insulated valve has the benefit of extremely low heat leak for minimum gas boil-off and eliminates unsafe ice build-up and dripping water issues.
  3. Interconnecting Pipe: Vacuum Insulated Pipe (also referred to as Vacuum Jacketed Pipe and Super Insulated Vacuum Line) is the foundation for heat loss efficiency and long-term integrity.
  4. Phase Separator: Chart's phase separator provides extremely high-quality, low pressure liquid nitrogen on demand resulting in a continuous supply of unsaturated liquid nitrogen.



A precise dose of liquid nitrogen is delivered immediately before capping or seaming. The trapped liquid nitrogen quickly vaporizes, pressurizing the container. In hot fill applications the nitrogen pressure counteracts the vacuum created when a hot product cools.

nitrogen dosing for bottled water packing

Key Benefits: lighter weight packaging, increased packaging rigidity, glass to plastic transition, eliminates package paneling, ease of labeling, oxygen reduction

Typical Applications: bottled water, energy shots, flax seed oil, juices (hot and ambient fill), teas, vinegar

In Operation: documented 9 gram reduction in PET bottle weight with Chart's MicroDose™ technology. Assuming the PET resin cost of $0.80/lb and a single production line running at 700 bottles/minute, this equates to an annual cost saving >$2.6 million


An exact dose of liquid nitrogen is introduced seconds before the seamer or capper. The volumetric expansion of the vaporized nitrogen pushes oxygen out of the container. 

nitrogen dosing for bottled water packing

Key Benefits: oxygen reduction, extended shelf life, efficient nitrogen consumption, stabilization of organic products

Typical Applications: automobile oil, beer, condiments, wine

In Operation: documented studies show a 26% increase in shelf life and 90 to 95% reduction in headspace oxygen compared to traditional gaseous nitrogen purging


A dose of liquid nitrogen is introduced to "lock in" and surface freeze the product before it's transferred to a traditional tunnel or spiral freezer.

nitrogen dosing for freezing

Key Benefits: maintains product integrity, aids in packaging and labeling, enables new products to be brought to market, enhances flavor and texture

Typical Applications: dipped ice cream cones and iCream Café

In Operation: liquid nitrogen flash freezing of ice cream cones provides stability and support through the packaging process resulting in improved overall aesthetics

Modified Atmosphere Packaging (MAP)

A large dose of liquid nitrogen is introduced into the package seconds before the seamer or capper.

nitrogen dosing for bottled water packing

Key Benefits: extended shelf life, oxygen reduction, reduced nitrogen consumption, stabilization of organic products

Typical Applications: baby formulas, coffee, nuts, trail mix, botanicals

In Operation: 46% reduction in nitrogen consumption using a Chart doser in lieu of traditional nitrogen gas purging

Superior Dosing Technology


Places or sprays liquid nitrogen on the surface of the product rather than penetrating the product surface, essentially eliminating any product splash and delivering consistent container pressure. Can be tailored to a specific product, package or application.

Chart SoftDose versus traditional nitrogen dosing


Developed in response to market demands to precisely dose liquid nitrogen into ultra light weight packaging to comply with tight container pressure specifications. Incorporates multiple sensors to detect variables such as filling line speed and bottle presence, that the system uses for fine tune elctronic adjustments.


Permits control access to via the customer's intranet enabling engineers to view the process, create and load recipes and trouble-shoot from a desktop PC, laptop or mobile device. Actions that previously required multiple staff for a large-sized machine or long-distance application are easily accomplished with significantly fewer operators.

Choosing Your Doser

Chart liquid nitrogen dosing equipment is easy to operate and can be integrated into new or existing packaging lines.

CryoDoser FleX®

CryoDoser Flex Pack Premier nitrogen doser for higher line speeds

  • First doser with the ability to serve every dosing application within one unit
  • Can be used from the slowest production lines to the fastest
  • Most efficient dosing system to date
  • Offered with more standard functions than any other doser on the market
  • Pack Premium controller is for higher line speeds (up to 2000 containers per minute)
  • Craft Custom controller is primarily for in-line packing lines and specifically the craft beer market



  • Ideal general purpose liquid nitrogen dosing system with speed compensated controls
  • Ultra-efficient system for low to medium production line speeds



  • High volume system for full container and headspace inerting applications
  • Designed to meet ultra-low oxygen specifications in the food and beverage industry
  • When compared to traditional gaseous nitrogen flushing applications, the Inerter system provides better consistency and reduces LN2 consumption and cost

Look out for the Nitrofresh® symbol on our equipment. Nitrofresh logo

For full product details and specifications please access our product catalog.

Support Service and After-Sales

Laboratory Services - let Chart develop and improve your product packaging. Send us your samples and we'll provide preliminary data and feedback to help you evaluate the benefits of liquid nitrogen dosing

Installation and Supervision

24/7 Technical Support

International Alliances - Chart is aligned with regional partnerships worldwide to provide knowledgable and immediate service to our global customer base

Options and Accessories - range of OEM equipment for customizing your doser, including vacuum insulated transfer hoses, phase separators and automatic filling stations for refilling portable liquid nitrogen cylinders from a piping system or bulk tank

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Catalogs, Spec Sheets & Other Resources

Nitrogen Dosers Product Catalog (Global)

UltraDoser® Spec. Sheet

CryoDoser FleX® Spec. Sheet

Inerter™ Spec. Sheet

Application Focus - General Nitrogen Dosing Capabilities

Application Focus - Nitrogen Dosing for Wine

Application Focus - Nitrogen Dosing for Beer

Application Focus - PET Container Reduction & Enhancement

Application Focus - Nitro & Cold Brew Coffee

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LN2 Dosers

Fremont, CA



Europe - Chart Pershore

Pershore, Worcestershire,

+44 (0) 1386 556622

+44 (0) 1386 556622

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