Whose is hc-290 hygrometer?

According to the product information of hygrometer hc-290, Shanghai Fatai Precision Instrument Co., Ltd. knows that hygrometer hc-290 is produced by Shanghai Fatai Precision Instrument Co., Ltd. and its release date is 202110. Humidity meter is an instrument for measuring air temperature or water vapor content in the air. In industrial and agricultural production, meteorology, environmental protection, national defense, scientific research, aerospace and other departments, it is often necessary to measure and control the environmental humidity.