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Active and Passive cold chain systems

Cold chain packaging solutions fall into two categories: active and passive.

When you think about temperature management, active systems like freezers, refrigerators, and cold rooms come to mind. These active devices are often put on trailers, vans, or pallets when it comes to shipments. They offer thermal control that proactively reacts to conditions outside.

Transport containers for cold chains that have current electric or battery-powered temperature controls are known as active systems. Passive containers are insulated boxes or other items without an active temperature control system. The risk profile of the product will often determine the sort of packaging that is chosen.

In an active system, cool air from the refrigeration system is pushed into the main payload area by a mechanism. Active thermal systems are not allowed to use phase change materials (PCM) like dry ice or water/ice. These systems combine mechanical or electrical components powered by an energy source with thermostatic controls to maintain the proper product temperatures.

Passive systems, on the other hand, combine ice or cool-packs with insulation to produce a set degree of thermal protection, which can be from coolers to chilly bins. Passive systems are less noticeable. Its capacity to safeguard a payload is based on the passive system's preparation and design.

To preserve the product's temperature for up to 96 hours or more, the majority of passive packaging solutions use vacuum-insulated panels, polyurethane or polystyrene insulation, or both. Passive systems are immune to internal freezing and may maintain more exact temperatures than active systems.

The main time constraint for passive systems is that they will always fail to maintain temperature if they are not delivered to the final location within the allotted time for packaging. Other disadvantages of passive systems include the need to condition the refrigerant to precise specifications, more complex shipping configurations, and the need to condition the refrigerant. Passive thermal systems commonly employ dry ice or water/ice. These are the simplest and most affordable modes of transportation.

Both techniques have advantages and disadvantages, and a lot rely on the particular requirements of your cold chain shipment. With so many options available, it's critical to pick a system or container that has been designed and thoroughly tested to maintain the necessary temperature for your application or demands.

Here at Variable watch, we strive to offer you a cost-effective way to monitor the temperature of your product, whatever it may be, throughout its life cycle. As we are the OEM of the equipment customizations are also possible should it be required.

Feel free to contact us for a solution to your needs.

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