NTC thermistor in greenhouse.Automatic machine mirror

　　At present, greenhouse has great advantages in Vegetable farming; In the vegetable market, various seasonal vegetables are often seen, most of which are grown in greenhouses and greenhouses; Vegetable farming is usually in the temperature range of 25-30 ℃ in the daytime and 15-20 ℃ at night (the best temperature difference between day and night is about 10 ℃), which is more conducive to growth; The temperature changes throughout the year, especially in the north. In winter, when the temperature is cold and low, vegetables will freeze to death or stop growing. Therefore, it is necessary to control the temperature of the greenhouse at around 15-20 ℃ at night. However, relying solely on manual control not only consumes human resources but also is prone to errors; In order to ensure that the temperature inside the greenhouse is suitable for planting, highly reliable NTC thermistors are used to make temperature controllers for temperature monitoring and control, in order to control the temperature of the greenhouse and meet the needs of production management.

　　The NTC thermistor used in greenhouse temperature controllers has a long service life. Glass encapsulated NTC thermistors are selected with resistance parameters of R25=50K Ω ± 1% and B25/50=3950K ± 1%. When the resistance value of the 50K Ω thermistor changes due to changes in the temperature of the vegetable greenhouse environment, the resistance value is small when the temperature is high, and the resistance value is large when the temperature is low. The NTC thermistor has the characteristics of small size, light weight, sturdy structure, high accuracy, fast thermal induction speed, good stability, high reliability, and high temperature resistance.

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