THIS COMPACT 6-IN-1 ENVIRONMENTAL METER MEASURES AIR VELOCITY AIR TEMPERATURE AMBIENT TEMPERATURE RELATIVE HUMIDITY LIGHT AND CONTACT TEMPERATURE. THE LM-8000 FEATURES DATA HOLD MINIMUM/MAX FUNCTIONS AND HAS BEEN DESIGNED FOR ONE HANDED OPERATION. FEATURES UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" MEASURES AIR VELOCITY/TEMPERATURE AMBIENT TEMPERATURE RELATIVE HUMIDITY CONTACT TEMPERATURE AND LIGHT EASY TO OPERATE DESIGNED FOR ONE HAND OPERATION AIR VELOCITY IS MEASURED IN M/S FT./MIN KM/H MPH OR KNOTS LIGHT LEVELS ARE MEASURED IN FOOT-CANDLES OR LUX TEMPERATURE IS MEASURED IN °C OR °F DATA HOLD AND MAX/MIN FUNCTIONS ZERO ADJUSTMENT BUTTON (LIGHT METER) LOW BATTERY INDICATOR AND AUTO SHUT OFF OPERATING TEMPERATURE 32 TO 122°F (0 TO 50°C) STORAGE TEMPERATURE 14 TO 140°F (-10 TO 60°C) OPERATING HUMIDITY RANGE 10 TO 85% INCLUDES UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" MULTI-FUNCTION ENVIRONMENTAL METER WRIST STRAP BATTERY APPLICATIONS UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" HVAC/R AND REFRIGERATION SERVICING DETECTING FILTER BLOCKAGE CONDENSERS AND CHILLERS