The world's most in-depth and scientific reviews of tech gear

How We Tested Vacuum Sealers

Saturday January 5, 2019
We sealed all sorts of different types of food to score these products.
We sealed all sorts of different types of food to score these products.

To sort out which vacuum sealers actually seal the best, we evaluated and compared close to a hundred different models, then picked out the products that we thought were the best. We then bought them all and tested them head-to-head to pick out our award winners. We split our testing process into four weighted rating metrics, with our exact testing procedure outlined below.

The Hamilton Beach's sealing performance was average overall.
The Hamilton Beach's sealing performance was average overall.

Sealing Performance


The set of tests that make up this metric are the test, accounting for 40% of the final score for each vacuum sealer. To start off, we compared how long it took each product to actually vacuum and seal, using four different types of foods to assess performance.

The first food item that we tested out each sealer with was with four normal slices of store-bought white bread. We sealed the first end of each bag, then stacked up four slices of bread along the bottom seal and scored each product on the time it took for it to completely vacuum and seal each bag on its standard settings.

It is very easy to crush soft foods like bread beyond recognition.
It is very easy to crush soft foods like bread beyond recognition.

Next, we timed how long it took each vacuum sealer to handle a cup of dried rice. We again awarded point on the overall time to remove the air from the bag and finish the second seal, though we did shake each bag quite a bit beforehand to ensure the rice packed in as compactly as possible.

You can even partition a bag to more easily portion your food.
You can even partition a bag to more easily portion your food.

We followed that with four precooked sausages, arranged with a slight gap to allow uniform airflow.

The Koios failed to evacuate all of the air in our sausage sealing assessment.
The Koios failed to evacuate all of the air in our sausage sealing assessment.

Finally, we finished off our set of speed tests for this metric by sealing a pound of ground beef in each kitchen appliance. The meat was formed into an identical square patty for each vacuum sealer.

We timed how long it took each vacuum sealer to seal a pound of ground meat.
We timed how long it took each vacuum sealer to seal a pound of ground meat.

Next, we moved on to evaluating and comparing how many bags you could seal and vacuum consecutively before the machine needed a cooldown period. We scored based on the number of bags each machine successfully sealed and vacuumed to 95%, going as fast as we could with identical bags.

For the last two assessments, we compared the strength of the seal by measuring how thick the area of fused plastic actually is and checked to see if you could use the manual function to seal the bag without losing seal strength, using our vacuum gauge. This is handy when preserving delicate foods, as it offers you a bit more control, which can make all the difference between perfectly sealing berries or crushing them to a pulp.

Croissants take a bit of finesse to vacuum seal  as they are easily crushed.
Croissants take a bit of finesse to vacuum seal, as they are easily crushed.

Convenience


Following the sealing performance of each product, we moved on to evaluating how easy each of these kitchen appliances is to operate. This accounts for 30% of the final score for each vacuum sealer.

First, we awarded points to products that had built-in storage for the roll of bags and a cutter. We found it much easier to get a cleaner cut much faster with a built-in cutter than the ones that did not, though using a separate paper cutter isn't that much worse. We quickly abandoned scissors.

A built-in cutter makes it easy to get a clean cut every time.
A built-in cutter makes it easy to get a clean cut every time.

Next, we looked at the overall size and weight of each appliance, as well as if there is a removable tray in the sealing area that makes it much easier to clean up any leaks. We also scored each sealer on how responsive the interface is and if there is a locking mechanism that engages while the device is sealing.

The Nesco lacks a removable cleaning tray  making it a bit of a pain to clean out if you accidentally suck in any liquid.
The Nesco lacks a removable cleaning tray, making it a bit of a pain to clean out if you accidentally suck in any liquid.

Finally, we awarded some bonus points to products that had additional pump attachments for sealing wine bottles or other small containers.

It is almost impossible to seal berries without crushing them.
It is almost impossible to seal berries without crushing them.

Delicate Foods


For our third metric, we assessed how well each vacuum sealer did when tasked with sealing delicate food items. These tests account for 20% of the total score and we again used white bread as our primary test food item.

We put two slices of bread in a bag, then manually controlled the vacuum until the bread was sealed the perfect amount before squishing it, then sealed the bag. We scored each appliance on how responsive it was when we hit the seal button, noting if it continued vacuuming and squished the bread or if it let in additional undesired air.

Most of these products have a very simple interface.
Most of these products have a very simple interface.

We also scored each machine on how easy it is to operate manually, using a combination of the "Seal" and "Cancel" buttons.

The vacuum gauge measuring the suction power of the FM5200.
The vacuum gauge measuring the suction power of the FM5200.

Suction Power


For the remaining 10% of the total score, we awarded points based on the level of vacuum that each appliance was able to pull in our test. We used a specialized vacuum gauge in a bag, then scored each one off the strength of the vacuum that was maintained after sealing.

Conclusion


Hopefully, this article has cleared up any confusion that you may have about how we tested and scored vacuum sealers. If you are looking for more information about how specific models did, then head on over to our comprehensive Vacuum Sealer Review to see which one came out on top when it comes to vacuum food storage or check out our Buying Guide for more information on picking out the perfect vacuum sealer!