... +0.02mm 4.RS232 Port 1. Introduction Ultrasonic Thickness Gauge measuring with ultrasonic wave, is applicable for measuring the ... equipment, and monitor the thinning degree during using.Ultrasonic thickness gauge can be widely used in petroleum, chemical, metallurgy, shipping, ... +0.02)mm,depends on Materials and conditionsUnits:Metric/Imperial unit selectablePower Source:2pcs 1.5V AA size, batteries. ...