1[Dual Ball Float Switch] This float switch uses two balls to control liquid levels, the motion range of two floats is 10mm. When a larger control range is required, you can combine two float switches for larger stroke, preventing excessive pump cycles. 2[Stainless Steel Casing] The float switch water level sensor features sturdy 304 stainless steel casing, resistant to rust and corrosion, ensuring durability even in demanding environments. 3[Highly Sensitive] This float switch water level controller offers exceptional sensitivity, accurately detecting liquid levels and providing reliable control and operation. 4[Specification and Length] With a 150mm size and a 400mm long wire, this float switch is designed to meet various installation requirements, providing versatility and convenience. 5[Wide Application] The dual ball float switch can be utilized for controlling liquid levels of water tanks, pools, sinks, aquariums, and more, or serving as an alarm switch for liquid level up and down. 1 x Dual Ball Float Switch