This is micro-processor based Donnelly Chute level Transmitter with isolated o/p (4-20 mA), 10nos digital optical o/p and 2 relay control .The instrument is field programmable and user friendly. In this Instrument user can set sensor sensitivity, sensor level selection, sample delay time and relay set point etc. The user can set level 2-10 then instrument automatically tunes for o/p 4-20 mA and display 0-100%. The instrument has five settable parameters like rL1,rL2,snt,trl,Lst. The Instrument reads input level in sequence 1 to 10 if misplaced any level then it will not show above levels.