Top mounted level transmitters from mahalaxmi instruments are based on reed resistance/permanent magnet. As liquid level float moves up or down magnet inside the float operates the reed switches there by causing a change in resistance value. The electronics unit can measure change in the resistance. Singal conditioner is head mounted and of 2-wire loop powered suitable for 12 to 24 v dc giving output of 4 to 20 ma.
Technical specifications, standard product - model [amt-04-f65-aw], [vmt-04-f92-aw] top mounted magnetic reed/resistance cascade type loop powered 2 wire level transmitter; process connection flange 78 or 120 mm diameter with 4 bolt holes of 6 mm or 14 mm dia on 65 or 92 mm pcd respectively; wetted parts flange and float stopper in ss 304; float material ss 316 and diameter 41 or 68 mm; operating pressure - 10 kg/sq.Cm and temperature - 125ºc maximum; specific gravity - suitable down to 0.7 [up to 0.5 optional]; range: 0-150 mm up to 0-3000 mm; resolution - better than ±10mm; span suppression - max 25% of span; zero elevation - max 25% span; excitation voltage - 12-36v dc; and loop resistance - max 600 ohms.
