Highest and lowest temperature meter, especially used in Meteorological
Type: Mercury-in-glass temperature
Structure: inner scale type
Using range: -40 centigrade to 50 centigrade, any points in this range.
1. Highest and lowest meteorological temperature is to record the highest
temperature and lowest temperature of the air in some time.
2. In this meter, right and left sizes, each has a blue indicating pointer When
air temperature rise, the blue indicating pointer rise with the mercury column,
when air temperature lower, the blue indicating pointer will not lower with the
temperature. So that could show the highest and lowest temperature in some