The Anova Precision Cooker is designed primarily for sous vide cooking and is not officially intended for canning. Canning typically involves the application of high temperatures and pressures to preserve food, which is quite different from the low-temperature, precise cooking that the Anova Precision Cooker specializes in.
When canning, it is important to adhere to recommended practices to ensure food safety, including using methods that create a proper vacuum seal and ensuring adequate pressure during the process. The sous vide method used by the Anova Precision Cooker does not achieve the necessary conditions for safe canning; therefore, using it for this purpose could lead to unsafe food preservation.
If you are interested in canning, it is advisable to look into pressure canners or water bath canners, which are specifically designed for this purpose. For additional information on proper canning techniques, current tutorials and guidelines available on food safety websites can be helpful.