The United States Department of Agriculture (USDA) recommends that pressure canner dial gauges be tested annually to be sure they are functioning properly.
Consumers who do home canning are advised to check with their state or county Extension Service to see if where tests can be conducted. Some local Extension Services offer the tests for free.
Pressure canners must be used to home can any low acid food including meats and poultry, vegetables and seafood.
You are in danger of botulism poisoning if using a pressure canner with a dial gauge that’s not reading accurately.
Only the pressure canner lid and dial gauge needs to be tested.