Omega Engineering’s RHXL3SD Handheld Thermometer/Hygrometer Data Logger comes with a temperature-humidity probe, 2 GB SD card and features automatic temperature compensation for dew point, wet-bulb and thermocouple measurements. It has the ability to hold readings and display maximum and minimum readings. Other features include an automatic power-off function that extends battery life and a large backlit dual-LCD display. The data logger is a good fit for clean rooms, greenhouses, and pharmaceutical industries to monitor the temperature and relative humidity of a storage room where perishable items are stored.