The introduction of a standard mercury thermometer

A standard mercury thermometer is the use of mercury ( Or mercury alloy) In thermal bubble and capillary principle of heat bilges cold shrink to measure thermometer. A standard mercury thermometer structure for rod type ( Including transparent rod type) Or internal standard type, it is mainly used for verification work thermometer, such as the bimetallic thermometer, pressure type thermometer, etc. , can also be used for precise temperature measurement. A set of measuring range is ( - 60 ~ 300) ℃ standard mercury thermometer should be not less than seven. Verification and subsequent verification standard mercury thermometer for the first time revised, zero value shall comply with the provisions of the table 1. Subsequent verification standard mercury thermometer adjacent the absolute value of the difference between the two periodic verification results revised shall comply with the provisions of the table 2.