Stefanelli Enterprises Internal Strip Chart Time/Temp Recorder. Product Models: 5, 10, 20, 30 Day Models. Chart reads in both Fahrenheit and Celsius. Temperature Range: -20ºF to +100ºF (-28ºC to + 38ºC). Chart: pressure sensitive, chart length 32 to 36 inches, chart width 2 inches. Packed in Case Lots of 20 units.