... , liquid level, temperature and so on.5:display:2*10backlit LCD,displaying instant flow rate,velocity,positive,negative,net totaliser flow ... iron,GRP,PVC,etc. that can not be welded directly.7: SEYV75-2 style special shielded twisted pair cable8: ultrasonic thickness ... gauge(measure the thickness of pipe,reduce error,increase accuracy) module style ultrasonic flow meter