Glass Thermometers

A candy thermometer, also known as a sugar thermometer, or jam thermometer is a cooking thermometer used to measure the temperature and therefore the stage of a cooking sugar solution. These thermometers can also be used to measure hot oil for deep frying.

The thermometer you use for checking the temperature does matter. For a refrigerator, you should use glass tube freezer thermometer.To check the temperature of a refrigerator, it's best to use food or liquid that has been in the compartment for at least 24 hours. The most common practice is to place a glass of water in the refrigerator (but not in the door) and let it sit for a day. Then place the thermometer in the glass to get a reading. If you're using an instant-read thermometer, you'll have your reading, well, instantly. For other types of thermometers, close the door and check back in a few hours, after internal temperature of the refrigerator has stabilized and the thermometer has had a chance to get a reliable reading.When you make an adjustment to the temperature of the refrigerator or freezer, you should give it at least 24 hours for the new setting to stabilize before taking another reading. Repeat the process until you reach the desired temperatures.