... materials, paper making, environmental protection industry and so on. Ultrasonic can spread effective in lots of occasion, Such as: ... Plastic-sprayed surface13.Stroke : Liquid level:4m,6m,8m,12m,15m,20m,30m Material level:3m,5m,7m,10m,15m More Ultrasonic ... level controller/transmitters/switch,Capacitance position and level sensor,Ultrasonic displacement sensor/level meter for industrial,mobile and oil ...