THIS ULTRASONIC THICKNESS GAUGE HAS A LARGE EASY-TO-READ LCD DISPLAY AND IS DESIGNED TO MEASURE THE THICKNESS OF 10 PRESET MATERIALS. THE TM-8811 FEATURES A BUILT-IN CALIBRATION FUNCTION LOW BATTERY INDICATOR AND INCLUDES COUPLANT. THIS PRODUCT INCLUDES AN ISO CERTIFICATE WITH FULL DATA AND UNCERTAINTIES. FEATURES UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" MEASURES THE THICKNESS OF STEEL CAST IRON ALUMINUM ACRYLIC RESIN RED COPPER BRASS ZINC QUARTZ GLASS POLYETHYLENE PVC GREY CAST IRON AND NODULAR CAST IRON LARGE EASY-TO-READ LCD DISPLAY DISPLAYS SOUND VELOCITY AT THE TOUCH OF A BUTTON AUTOMATIC MATERIAL CALIBRATION USER SELECTABLE UNIT OF MEASURE (IN/MM) LOW BATTERY INDICATOR ACCURACY ±(0.5% + 0.1MM) PROBE LENGTH 3' (36"") PROBE DIAMETER 0.4"" (10MM) POWER SUPPLY 4 AA BATTERIES OPERATING TEMPERATURE 32 TO 122°F (0 TO 50°C) PROBE OPERATING TEMPERATURE 32 TO 104°F (0 TO 40°C) STORAGE TEMPERATURE -4 TO 140°F (-20 TO 60°C) OPERATING HUMIDITY RANGE 20 TO 80% INCLUDES ULTRASONIC COUPLANT GEL PROBE HARD CARRYING CASE AND BATTERIES APPLICATION MONITORING AND VERIFYING PIPES AND PRESSURE VESSELS INDUSTRIAL MANUFACTURING