Features EASY INSTALLATION --- The liquid level sensor (sensing piece) is installed above and below the outer wall of the measured pipeline (high and low levels of the liquid). APPLICABLE LIQUID --- Suitable for liquid level detection of various liquids such as water, turbid liquid, strong acid, strong alkali, and strong corrosive liquid, etc. NON CONTACT --- The liquid level switch sensor is non contact design, with NPN normally open switch mode, ensuring stable and reliable operation. EXCELLENT CHIP --- The liquid level switch sensor adopts advanced high speed signal processing chip to detect the liquid level in sealing containers. WIDE APPLICATION --- Suitable for water tower and tank water supply, fish tank live water processing, sewage processing equipment, smart water supply, medical device, etc. Specification: Item Type: Liquid Level Sensor Model: NCLS-5002Y Product Voltage: 5-30VDC Switching Mode: NPN Normally Open Applicable Scene: Intelligent water supply for water towers and tanks, active water processing for fish tanks, environment friendly sewage processing equipment, smart water replenishment for boilers, intelligent water supply for animal husbandry, medical device, etc. Package List:1 x Sensor1 x Screwdriver1 x Cable Tie Package List 1 x Sensor 1 x Screwdriver 1 x Cable Tie