测量和记录现场的液位信号。
6．配温湿度变送器，实现测量和记录现场的温湿度信号。
LR1220,LR1222,LR1224,LR1226,LR1228，LR1230,LR1232,LR1234,LR1236,LR1238
LR1240,LR1242,LR1244,LR1246,LR1248，LR1250,LR1252,LR1254,LR1256,LR1258
LR1260,LR1262,LR1264,LR1266,LR1268，LR1270,LR1272,LR1274,LR1276,LR1278
LR1280,LR1282,LR1284,LR1286,LR1288