Family flowers without potted thermometer

Now many families like to put a few potted plants, or the balcony in the bedroom, not only can adjust indoor air, also can have the effect of ornamental. How to put their maintenance good, cannot leave the temperature is an important factor. How do us good to control the temperature? This requires a potted thermometer. Potted thermometer is bimetallic thermometer, with different expansion coefficient of solid combination together two pieces of metal heat element, generally made spiral wound, its one end fixed and the other end with a pointer. When the temperature changes, the thermal component of curvature change, free end rotation, drive the pointer indicates the temperature value on the dial. Potted thermometer is used to test the soil temperature thermometer, the soil temperature, can accurate judgment and measurement is in the garden planting more and more big, it to the growing of crops, and having the effect that cannot underestimate potted tail thermometer was pin type, can be directly inserted into the soil, soil temperature.