... materials,memory of 4000 readings with location number,RS232 output Ultrasonic Thickness Gauge Features:* Pocket size, easy to operate* Suitable for ... max 9 readings* Limits setting Low-High* Standard 5.0MHz transducer included, optional transducers 7.5MHz, 2.0MHz, 5.0MHz high ... 2.0-100mm Ø 13 <350? Ø 20?mm For High tempureture Ultrasonic Thickness Gauge Ultrasonic Thickness Gauge