Glass Thermometer Maintenance Care of Glass Thermometers Treat glass thermometers with proper care. Never tap against hard surfaces—small fractures may result, affecting accuracy. Do not subject a glass thermometer to extreme temperature changes—the thermometer may break or the liquid column may separate.
Reuniting Separated Liquid Columns Thermometer liquid columns can become separated during shipment. This means that some gas has gotten below the top of the mercury or spirit liquid-fill. Inspect thermometers for bubbles in bulb or liquid separation before using. For reunification methods, see "Methods for Reuniting Separated Columns" link below. | |