A float switch is a device used to sense the level of liquid within a tank. It may activate a pump, indicator, alarm, or other compatible device. Use with hydroponics systems, saltwater tanks, freshwater tanks, gardening setups, aquariums, power head control, pet water bowls, fish tanks, filtration systems, and heating applications. 1 pc Tank Pool Horizontal Water Level Switch – Liquid Level Sensor – PP Plastic Ball Float Switch Features: Contact rating (Max): 10 W Switching voltage (Max): 110 V DC/AC Switching current (Max): 0.5 A Breakdown voltage (Max): 220 V DC/AC Carry current (Max): 1 A Contact resistance (Max): 100 Ω Temperature rating: -10 °C to +60 °C Color: Black Material: Metal Dimensions: Cable length: 40 cm; Float length: 8.5 cm Package Contents: 1 x Liquid Level Sensor Note: The actual product color may vary slightly due to lighting conditions and screen settings. Measurement tolerance: ±1–3 cm.