How to determine accuracy of bimetallic thermometer is 1. 0 or 1. 5?

Bimetallic thermometer temperature sensing element is composed of two different pieces of metal, on principle of heat bilges cold shrink metal temperature measurement. Precision level is divided into: 1. Level 0, 1. Level 5, 2. Level 0, 2. Level 5 and 4. Level 0. 1. Level 0 is the best precision grade. 4. Using precision grades of level 0 is the worst. Usually in the industrial field, use 1. Level 0 and 1. Level 5, and some domestic areas, because do not need very accurate precision, can use poor precision grade. The process also requires high accuracy are high, and of course the price also will be more expensive. Below we introduce how to judge the accuracy of bimetallic thermometer is 1. 0 or 1. 5? Gb logo usually either above or below the hole in the center of the table card, such as onion parody, 1 in the circle. 5, it indicates that the precision of grade 1. Level 5; European standard and German standard logo below the maximum range, such as YouShangTu and upper cl1, it indicates that the accuracy grade of European standard 1. Level 0; American standard, not clearly marked on the panel, such as lower left figure, can ask the supplier the actual precision grade.