Features PP Plastic: The double float shell is made of PP plastic, aging resistance, glazed surface, excellent workmanship, and strong actual durability Automatic Pumping: Automatic pumping, stop when the water is full, use A1, A2 for automatic pumping, B1, B2 for automatic drainage, stop when there is no water Ventilation Hole Shape: The ventilation hole shape can prevent water from corroding the internal components of the switch in a humid environment to extend the life of the switch Main Body Seals: The main body of the switch is sealed, completely moisture and dust prevention, and the center of gravity of the solids float is stable and accurate Application: Suitable for automatic water level control of self provided water pumps, wells, pools and other water supply systems in factories and families Feature: 1. PP Plastic: The double float shell is made of PP plastic, aging resistance, glazed surface, excellent workmanship, and strong actual durability 2. Automatic Pumping: Automatic pumping, stop when the water is full, use A1, A2 for automatic pumping, B1, B2 for automatic drainage, stop when there is no water 3. Ventilation Hole Shape: The ventilation hole shape can prevent water from corroding the internal components of the switch in a humid environment to extend the life of the switch 4. Main Body Seals: The main body of the switch is sealed, completely moisture and dust prevention, and the center of gravity of the solids float is stable and accurate 5. Application: Suitable for automatic water level control of self provided water pumps, wells, pools and other water supply systems in factories and families How to Use: Installation Method: Fix the controller horizontally above the liquid level. The height of the controlled liquid level is determined by the upper and lower positions of the 2 floating buckets in the liquid, can be adjusted arbitrarily and can be installed on the top or side (Such as side mounting, the shape must be adjusted to the visual level) Specification: Item Type: Double Float Liquid Level Switch Material: PP Plastic Purpose: Suitable for automatic water level control of self provided water pumps, wells, pools and other water supply systems in factories and families Rated Current, Voltage: 15A 250V (380V) Control Range: Approx. 0.2-5m / 0.66-16.4ft Working Temperature: 0℃~80℃ Working Life: Package List 2 x Floating Ball 1 x Control Box 1 x Bracket