Quick responding and high accuracy with LCD display. REED TM-8811 Offers This ultrasonic thickness gauge has an 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. Features Measures the thickness of steel, cast iron, aluminum, red copper, brass, zinc, quartz glass, polyethylene, PVC, grey cast iron and nodular cast iron 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 Included Ultrasonic Thickness Gauge Ultrasonic Couplant Gel Probe Hard Carrying Case Batteries