The SANSEL HTD 200 Precision Portable Hygrometer & Data Logger is a high-accuracy handheld instrument designed for measuring Relative Humidity, Temperature, Dew Point, and Frost Point with excellent stability and reliability. Equipped with advanced data logging functionality, the HTD 200 records live environmental data for analysis and documentation. Optional PC interface software enables graphical and tabular review of recorded measurements, making it ideal for calibration laboratories, HVAC applications, pharmaceutical facilities, food processing industries, server rooms, hospitals, and environmental monitoring. Covering a wide measurement range from -40°C to 85°C and 0 to 100% RH, this portable hygrometer serves as a reliable reference standard for temperature and humidity calibration and validation applications.