Differences of 2 inner tube colors of mercury-free thermometer

In the beginning, the inner glass tube of the mercury-free thermometer had only one color: blue. For example, the mercury-free thermometers produced by Geratherm and Syndigomed all use blue inner glass tube.

However, during the sales process, some customers complained that the liquid column in the blue inner glass tube is not very clear. Therefore, as a professional manufacturer of mercury-free thermometers, Syndigomed finally developed the yellow inner glass tube after years of painstaking research.

Compared with the blue inner glass tube, the yellow inner glass tube can better see the rise and fall of the liquid column.

Recommended inner tube color of mercury-free thermometer

Therefore, we recommend customers to buy mercury-free thermometers with yellow inner tubes.