Welcome to purchase discount source dywer series ult ultrasonic level transmitter from our company, which is one ... of the best China dywer series ult ultrasonic level transmitter manufacturers and suppliers.Series ULT Ultrasonic Level TransmitterExplosion-proof, Mapping ... . 1, Groups E, F, G.Mounting Orientation:Vertical.Failsafe:On lost echo after 30 seconds, user selectable to 4, 20, 21 ...