procurement of ash level indicator-rf type level switch probe length 610 mm of esp hopper for emd-iv, stps, mppgcl, sarni procurement of ash level indicator-rf type level switch probe length 610 mm of esp hopper for emd-iv, stps, mppgcl, sarni. , ash level indicator-rf type level switch probe length 610 mm of esp hopper , ash level indicator (rf type level switch ) consist of electronic controller, sensing probe, probe head & cable model switch electronic controller model no. 550:- line voltage – 220v ac, line voltage sensitivity - ± 10%, frequency – 50hz, power consumption – 3va, ambient temperature limit- (-) 10 to (+) 60oc, output relay- 2 sets of c/o potential free contacts ( spdt), contact rating- 5amps 220vac non-inductive, local led indications- green ( normal level), read ( alarm level), yellow ( probe healthy), cable length- electronic unit to probe – 15 mtrs, sensing probe:- ambient temp- 250 60oc, exposed metal – ss 304, insulation – ptfe, insertion length 220 mm, mounting – 40 nb bsp threaded, probe head:- construction – cast aluminum, conduit/ cable gland connection – ½ bsp, cable:- special coaxial cable, connection center wire for probe connection, middle shield for signal connection, top level wire for ground connection, cable length - 15 mtrs ( for each ash level indicator ), conductor- copper, insulation- pvc/ptfe