Echotel Model 338 is a two-wire, loop-powered non-contact transmitter for liquid level, volume, and open channel flow measurement. Featuring advanced digital signal processing and a powerful transducer, this versatile transmitter provides exceptional measurement performance in a wide variety of applications. is analyzed by the transmitter. The elapsed time between the generation of the ultrasonic pulse and the return echo is proportional to the distance between the face of the transducer and the liquid surface. The distance value is used by the transmitter to compute level, volume, or flow in the engineering units selected by the user. Fig­ure Type Hous­ing Pro­tec­tion rat­ing 1 In­puts dig­i­tal Out­puts dig­i­tal Input volt­age (sen­sor sup­ply) 2 Out­put volt­age (ac­tu­a­tor sup­ply) 3 AS-i con­nec­tion 4 AS-i ad­dress 5 Ar­ti­cle No. ??????? ??? ??????? ?? ?????? ?????????? ?????? ??? ?? ?????? ?? ??????? ??? ????????? ?????? ??????? Toll Free: 1-800-624-8765 (US) | E-Mail: mel@magnetrol.com This program will assist in selecting a Magnetrol liquid level or flow control. This program utilizes general guidelines of level/flow control selection and cannot take into account all possible variables. This program is not intended to be fully comprehensive. Search Bar Filters. Use the drop-down on the search bar to filter search results for a specific type of technical information. The different types of technical information are described below. connection at the base of the transmitter housing with the top of the probe. Hand-tighten the connection. ? Rotate the transmitter so that it is in the most convenient position for wiring, configuring, and viewing. ? Using a 11? 2" (38 mm) wrench, tighten the universal con-nection on the transmitter 1? 4 to 1?2 turn beyond hand-tight. ??????????? (level measurement) ??????????????????????????????????????????????????????????????????? ???? ??????????????????????? (temperature) ??????????? ??? Level Measuremen