level sensor MR1143-P 1.Low cost 2.Long life 3. simple installation 4. Wide application With CE, ISO9001, ROHS certi Liquid level sensor M1143-P Movement explaination:When the float ball rises or falls with the liquid to the level of the switch, The magnetic force of magnet which inside of the float ball will cause the reed switch to turn ON. When the float ball move away from the reed switch, ...