... HL, HRC, HRB, HV, HB, HS RS232 Interface SV-T201 Ultrasonic Thickness Gauge Handy, precise, excellent EMC performanceInstrument features:Standard parameter ... various frequency and crystal size.Automatic zero adjustment, two-point correction and auto correcting system errors.Able to measure the ultrasonic ... , printing the measurement reports and so on SV-T201 High-precision ultrasonic thickness gauge