Description Smart Sensor Model:840 Ultrasonic Thickness Gauge Meter The Smart Sensor AS-840 is a high-precision ultrasonic thickness gauge designed for non-destructive measurement of metal and non-metal surfaces. It is widely used in industrial settings, pipelines, shipbuilding, machinery, and inspection environments to measure material thickness from one side only. Key Features: Measuring Range: 1.2 mm – 225 mm (on steel) Accuracy: ±(1%H 0.1 mm) Resolution: 0.1 mm Sound Velocity Range: 1000 – 9999 m/s for different materials Probe Frequency: 5 MHz (Φ10 mm sensor) Data Storage: Stores 10 readings with 12 built-in sound velocity materials Display: Large backlit LCD screen with coupling indicator and battery warning Functions: Auto zero calibration, linear compensation, auto power-off Power Supply: 9V battery Dimensions: 150 × 80.5 × 34 mm Weight: Approximately 200 grams Contact Us for more information || Visit our Facebook Page Smart Sensor Model:840 Ultrasonic Thickness Gauge Meter