Extech 44550 Pocket Humidity Thermometer Hygrometer features: Built-in sensors provide simultaneous readings of Relative Humidity and Temperature; Humidity: 20 to 90%RH (5%RH), Temp: 14 to 122° F or -10 to 50°C, Accuracy: 5%RH; 2°
F, 1°C; Max/Min with Clear function.
Extech 445580 Humidity Temperature Pen Thermometer features: Compact, Digital Hygro-Thermometer, ideal for field use; Simultaneous display of Temperature (C/F) and Relative Humidity; Max/Min and Data Hold; Built-in self calibration utility, etc.
Extech 445702 Hygro-Thermometer with Clock features: Combines three displays for Time, Temperature, and Humidity; Clock displays 12/24 hour time; Max/Min with "reset" function; Humidity: 10 to 85% RH Temp: 14 to 140°F or -10 to 60°C Accuracy: +-6%RH; +-1.8°F, +-1°C.
Extech 445703 Hygro-Thermometer Big Digit features: 1" Digits on Super Large LCD; Max/Min with "reset" function; Humidity: 10 to 99% RH Temp: 14 to 140°F or -10 to 60°C Accuracy: +-5%RH; +-1.8°F, +-1°C.
Extech 445713 Big Digit Indoor-Outdoor Hygro-Thermometer features: Simultaneous display of Temperature/Humidity; Max/Min with "reset" function; Humidity: 10 to 99% RH; Temperature: 14 to 140°F or -10 to 60°C; Accuracy: 5%RH; 1.8°F, 1°C.
Testers and Tools 
