Wall thermometer -30 ° + 50 ° C
This wall thermometer has a range from minus 30 degrees Celsius to minus 50 degrees Celsius. The graduated scale has an accuracy of 1 ºC, covering a total of 80 temperature values.
The thermometer is an instrument used to determine the temperature or temperature changes in a place. It consists of a thin and graduated glass tube, in which mercury is present, a substance that, having a large expansion coefficient, increases its volume according to the increase in temperature. Thus, as the ambient temperature increases or decreases, it is possible to observe the mercury rising and falling, respectively, along the graduated tube.
This thermometer is designed to be placed on a wall. It has a white background and a red border.
See also a thermometer with the same operation, with minimum and maximum temperature indication here.