THIS PORTABLE THERMO-HYGROMETER MEASURES AND DISPLAYS AMBIENT TEMPERATURE AND RELATIVE HUMIDITY SIMULTANEOUSLY. THE R6001 FEATURES DATAHOLD MIN/MAX AND RELATIVE FUNCTIONS. THIS PRODUCT INCLUDES AN ISO CERTIFICATE WITH FULL DATA AND UNCERTAINTIES. FEATURES UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" EASY-TO-USE INTUITIVE DESIGN DUAL LCD READOUT DISPLAYS TEMPERATURE AND RELATIVE HUMIDITY USER SELECTABLE °F / °C HIGH SAMPLING RATE OF 2.5 TIMES/SEC DATA HOLD MIN/MAX AND RELATIVE FUNCTIONS LOW BATTERY INDICATOR AND AUTO SHUT-OFF OPERATING TEMPERATURE -4 TO 140°F (-20 TO 60°C) STORAGE TEMPERATURE 14 TO 140°F (-10 TO 60°C) OPERATING HUMIDITY 10-80% INCLUDES UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" THERMO-HYGROMETER ISO CERTIFICATE WITH FULL DATA AND UNCERTAINTIES CARRYING CASE BATTERY APPLICATIONS UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" ENVIRONMENTAL STUDIES FOOD DISTRIBUTION HVAC/R SYSTEM INSTALLATION GREENHOUSES AND INDUSTRIAL SPACES SAUNAS HUMIDORS MUSEUMS LAB MONITORING