Sling Psychrometer, to measure relative humidity, Includes two plastic-backed Celsius thermometers, one for dry bulb measurements and the other for wet bulb measurements, Includes an activity guide with relative humidity calculation table, Requires assembly,pack of 15
Digital Min/Max Thermometer, records the minimum and maximum temperatures for seven days at a time, features a water-resistant housing, a cover for protecting the LCD display, low battery indicator, selectable C or DEG F, dual channels with separate temperature readings