Features: High-quality water level sensor available in 4 lengths: 1.5, 2, 4, and 5 meters. Set includes 3 units. Features anti-short circuit design to prevent malfunction caused by moisture or water conductivity in tanks or well walls. Utilizes an electrode rod with a plastic insulating sleeve for safe operation. The float switch detects liquid levels in a tank and can activate pumps, indicators, alarms, or other devices. Ideal for use with hydroponics, saltwater tanks, freshwater tanks, gardening systems, aquariums, pet bowls, fish tanks, filtration systems, and heating applications. Package Includes: 1 x Water Level Sensor Specifications: Material: ABS + Stainless Steel Size: 1.5, 2, 4, 5 meters (approximately 3.3, 6.6, 13, 16 feet) Note: Please allow 1-3 cm error due to manual measurement. Ensure you are comfortable with this before purchasing. Due to differences in monitor displays, the actual color of the item may vary from the image shown.