... life:>100,000 times 3.Simple installation 4.Widely Use Level Switch SZ-MR1078-SPL1.Low cost 2.Electrical life:>100,000 ... can adjust the level of Barrel,Well & Trough. With resistance against the polluted water, it occupiesthe advantages for automatic ajustment, easy ... Range: ≥0.2mElectrical life: ≥100,000timesMechanical life: ≥500,000timesThe length for the wire:1m,2m,3m,4m,5m,10m, also available ...