The RHXL3SD handheld thermometer/hygrometer also performs data logger duties and comes with a temperature-humidity probe, 2-GB SD card, and features automatic temperature compensation for dew point, wet-bulb, and thermocouple measurements. The instrument has the ability to hold readings and display maximum and minimum readings and provides an automatic power off function that extends battery life. The backlit dual LCD display is easy to read. Price starts at $385. OMEGA ENGINEERING INC., Stamford, CT. (800) 872-9436.