FT3470-51 FT3470-52 3288 3244-60 IR4016-20 3554. BT3554 3244 obsolete replaced by 3244-60 3801-50 obsolette repl by DT4282 HIOKI 8421 discontinued, replaced by LR8400-20 or LR8431-20;Memory Hilogger LR8400-20 LR8431-20. Measuring Rods For:3554 LR-8431 IR3455 -20