Why do people use north electric contact bimetallic thermometer?

With the development of the society, more and more high, the people's standard of living, all the year round temperature, but is divided into north and south, so, there are also special heat and special cold places, especially in the north, the temperature is very low, assure indoor temperature is in a person's ability to withstand the range is required, indoor requirements over the environment, so to control the temperature with a thermometer. So, what kind of thermometer is used? I want to say electric contact bimetallic thermometer. The following specific said the thermometer. Working principle of the electric contact bimetallic thermometer on the basis of the original instrument installation electric contact structure, using the drive contact changes when temperature changes, when the temperature reached or exceed the set value, when touch point contact with the upper and lower limits or disconnect at the same time, make the circuit of relay action, close contact signal, to control and alarm automatically. Electric contact bimetallic thermometer features does free of mercury pollution, easy reading, solid and resistance to vibration, can replace industrial glass mercury thermometer does can be applied to most of the corrosive medium, gas measurement does waterproof, corrosion resistance, vibration resistance, intuitive and convenient alternative to other forms of thermometer table does a variety of structural form, the main technical indicators that can satisfy different requirement does precision grades: grade 1 ~ 1. Level 5 does measuring range: - 150 ~ 500 ℃ does long tail: 40 ~ 2000 mm measurement range of 0 ~ 50 ℃, the tail should be > 75 mm long; When measuring range > 100 ℃, should > 70 ~ 100 mm, so as to ensure the accuracy of measurement. Does the use of environmental conditions: ambient temperature 25 ℃ ~ 55 ℃. Relative humidity: 5 ~ 95%; Medium pressure < 6. 4MPa。 Does the shell material: plain carbon steel plating or painting, stainless steel does material: iron, stainless steel plating can know from the above introduction, the thermometer can bring great convenience to the people in the north, it is to remind the kernel outdoor temperature changes, be sure to keep warm warm.