How to choose and buy Marine glass rod thermometer?

Marine glass rod thermometer is a kind of glass rod thermometer, Marine glass rod the working principle of the thermometer is the use of liquid temperature measuring principle of heat bilges cold shrink effect: when the temperature changes, the glass ball in the liquid volume expansion or contraction, will happen to change into the liquid column height in capillary, which indicates the temperature change. Marine glass rod thermometer used in pipelines, chemical equipment, special thermometer is pipes. So how to choose and buy Marine glass rod thermometer? Instrument to tell you how to choose and buy Marine glass rod Marine glass rod thermometer thermometer is the upper aluminium by polishing or sandblasting and anodic oxidation into gold, to uncover her nakedness for copper, when high temperature iron material is qualitative. Marine thermometer glass rod length of the upper have generally has three kinds, respectively is 110 mm / 150 mm / 200 mm, Marine thermometer glass rod installation way has two kinds of straight and curved type; Marine glass rod thermometer in blue or red organic thermal fluid filling. Above 300 c, filled with mercury. Based on the above introduction, we can according to the demand for Marine glass rod thermometer.