A chamber vacuum sealer versus an external vacuum(such as a nozzle sealer) both devices used to extend the shelf life of food by removing air from the packaging,  but they operate differently and are suited to different tasks. Here’s a breakdown of the main differences between the two:

Chamber Vacuum Sealer

1. Mechanism:

Internal Sealing: The entire bag is placed inside a chamber. The machine then removes air from the entire chamber, including the bag, before sealing it.

Vacuum Strength: Generally stronger and more consistent vacuum, as it evacuates air from the entire chamber.

2. Capabilities:

Liquids: Excellent for sealing liquids or foods with high moisture content since the vacuum is applied evenly around the bag, preventing liquids from being sucked out.

Bulk Sealing: Suitable for high-volume sealing tasks; often used in commercial settings.

3. Cost and Size:

Cost: Typically, Higher cost due to their robust construction and advanced capabilities.

Size: Larger, requiring more counter or storage space.

4. Applications:

Industry Use: Common in restaurants, catering businesses, and food processing facilities.

Versatility: Can handle a variety of food items, including soups, stews, and marinated meats.

External Vacuum Sealer

1. Mechanism:

External Sealing: The open end of the bag is placed into the machine, which then removes air from the bag before sealing it.

Vacuum Strength: Generally, less powerful than chamber sealers, and the vacuum can be less consistent.

2. Capabilities:

Liquids: Not ideal for sealing liquids or very moist foods, as the liquid can be drawn into the machine’s pump.

Home Use: Suitable for every day, smaller-scale tasks.

3. Cost and Size:

Cost: Lower cost, making them accessible for household use.

Size: Compact and lightweight, easy to store and transport.

4. Applications:

Home Kitchens: Perfect for home cooks looking to prolong the freshness of dry goods, meats, and vegetables.

Portability: Easy to use for occasional sealing needs, such as vacuum-packing leftovers or preparing food for sous-vide cooking.

Summary

Chamber Vacuum Sealers are robust, powerful, and versatile, ideal for commercial use and handling liquids, but they higher cost and larger.

External Vacuum Sealers are lower cost, and compact, suitable for home use and smaller tasks, but they struggle with sealing liquids.

Choosing between the two depends on your specific needs, budget, and intended use. For heavy-duty, versatile sealing, a chamber vacuum sealer would be the better choice. For occasional use, an external vacuum sealer is likely sufficient.