科比变频器14f5c1d-下载亚博app
科比变频器14f5c1d-380a
根据使用目的的区别,已设计制造出多种温度计。其设计的依据有:利用固体、液体、气体受温度的影响而热胀冷缩的现象;在定容条件下,气体(或蒸气)的压强因区别温度而变换;热电效应的作用;电阻随温度的变换而变换;热辐射的影响等。
1.气体温度计:多用氢气或氦气作测温物质,因为氢气和氦气的液化温度很低,接近于零度,故它的测温范围很广。这种温度计度很高,多用于精密测量。
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