Float switch

Float switches are electromechanical devices designed to detect and control liquid levels in tanks, reservoirs, and industrial vessels. These sensors operate using a buoyant float that moves with the liquid surface, actuating an internal switch mechanism—typically a reed switch or microswitch—to open or close an electrical circuit. Common configurations include vertical or horizontal mounting, with cable lengths ranging from 2 to 20 meters, and materials such as polypropylene, stainless steel, or PVC for compatibility with various fluids. Key technical parameters include maximum switching voltage (e.g., 250 VAC), current rating (up to 10 A), and protection class (IP68 for submersion). Float switches are available in normally open (NO) or normally closed (NC) contact arrangements, and some models feature adjustable switching points for precise level control.

Float switches are widely deployed in water and wastewater treatment plants, pumping stations, HVAC systems, and industrial process automation. They are essential for sump pump control, tank overflow prevention, and dry-run protection in irrigation systems. In the oil and gas sector, explosion-proof float switches are used for hazardous liquid monitoring. Other applications include chemical dosing, food and beverage processing, and marine bilge pump control. Their robust design ensures reliable operation in harsh environments with corrosive or viscous media.

Our catalog includes vertical float switches with cable outlets, horizontal side-mount models, and multi-level switches for detecting multiple liquid heights. Key article codes follow a structured format: "FS-" for float switch, followed by material code ("PP" for polypropylene, "SS" for stainless steel), cable length in meters, and contact configuration ("NO" or "NC"). For example, FS-PP-5-NO indicates a polypropylene float switch with a 5-meter cable and normally open contact. We also stock compact mini float switches for tight spaces and high-temperature variants rated up to 120°C.

At Electric Automation Network, we offer real-time pricing and express worldwide shipping for all float switch models. Our engineering team provides personalized technical support to help you select the right switch for your fluid type, temperature, and pressure conditions. Each product includes detailed documentation with wiring diagrams and installation guidelines. Whether you need a single unit for a small tank or bulk quantities for large-scale projects, we ensure fast delivery and expert assistance.