... channels 3. ultrasonic flaw detect 1. Big Oil and Gas Pipe and tube detection---Ultrasound 2.reach the demands of ... ,2,4,8,16 Operation mode Single probe transmitter and receiver, dual probe transmitter and receiverScan mode A,B,C type scan Surplus ... 1024 (Optional)Detector modepositive, negative, bi-directional, radio frequency (RF)Peak memoryCan choose echo peak memory display,background peak wave ...