Pressure Cooker and Canner Gauge Testing Pressure canner and cooker steam gauges should be tested for accuracy. Your pressure cooker or canner dial gauge will be tested against a Master Gauge which will determine if your gauge is accurate, if you can compensate for your gauge being off, or if your gauge needs to be replaced. Check with your County University Extension office to see if the testing is done locally. 82087 Steam Gauge $19.98 85374 Steam Gauge with Adapter $24.49 82237 Steam Gauge $24.49 33136 Pressure Gauge Adapter $2.49 Don't know which one? First, Find your model number on your cooker or canner. Then click here Can I use any pressure gauge on a pressure canner? "NO"! These are ”STEAM GAUGES”. They are specially designed to work WET and HOT. Just any pressure gauge “dry gauge” will fail and may be UNSAFE.