Make refrigerator, freezer or environmental temperature readings accurately or measure and record temperature in air, gas, liquids, powders and semi solids. Temperature is displayed on a large LED display. Multiplex selection allows recording speeds of 6 hours, 24 hours or seven days with selectable temperature ranges of -40 to 30°F, -20 to 50°F or 50 to 120°F. The centigrade model records in the ranges -40 to 0°C, -30 to +10°C and 10 to 50°C. Stainless steel probe is 4" long with 15 feet of thermocouple wire. Furnished with two cartridge pens and 100 assorted charts (6" Dia). Case is Lexan® and measures 9" x 7" x 3", 110V.