Pressure gauge accuracy level 2. Level 5 and 1. Which level high level 6?

The working principle of pressure gauge is a sensitive element (by table Bourdon tubes, bellows, bellows) Elastic deformation, the pressure deformation by the transformation of movement in table to Pointers, cause the hands to display the pressure. General pressure gauge accuracy grade is permissible error of pressure gauge range to represent the percentage of, usually divided into 0. 5, 1, 1. 5, 2, 2. 5, 3, 4 seven ( On the boiler without level 3 and level 4) , the smaller the value, the higher accuracy. Pressure gauge the size of the actual error, not only related to the accuracy, but also with the size of the range of pressure gauge. Range at the same time, the higher precision ( The smaller the number) The smaller, and allowed error of pressure gauge. Precision of phase at the same time, the greater the range, the greater the error of pressure gauge. So, 1. Level 6 precision is higher than 2. Level 5, 1. Level 6 on behalf of error for the full scale & plusmn; 1. 6%, so the error will be smaller.