The TA620A High Accuracy Digital Thermo-Hygrometer is a portable environmental measurement instrument designed for accurate monitoring of ambient temperature and relative humidity. Equipped with a high-precision GXHTC3 temperature and humidity sensor, it provides fast and reliable measurements with real-time display of temperature and humidity changes. The instrument measures temperature from -20°C to 60°C and relative humidity from 0% RH to 100% RH, making it suitable for a wide range of indoor and industrial environmental monitoring applications. As a digital thermo-hygrometer, temperature and humidity meter, humidity tester, environmental meter, air condition monitor, and portable climate measurement instrument, the TA620A integrates practical functions including data hold, maximum/minimum value recording, °C/°F unit conversion, and backlight display. These functions help users quickly identify environmental variations and maintain suitable temperature and humidity conditions. With its compact handheld design, stable performance, and easy operation, the TA620A is widely used in warehousing and logistics, HVAC systems, cleanrooms, food processing facilities, pharmaceutical storage, laboratories, building inspection, indoor air quality assessment, agriculture and greenhouse management, archives, museums, electronics manufacturing, and industrial production environments. It is ideal for applications such as warehouse climate inspection, server room monitoring, cleanroom control, greenhouse management, equipment environment evaluation, and routine field inspections.