Features: This product appearance lightweight flexible, small size, easy installation. Can use for Water heaters, credit card machines, water vending machine, flow measurement device. Seal Rings with the upper and lower force structure never leaks. Wiring mode: red positive, black negative, yellow signal output. Scope of use: water heater, wall mounted stove, water dispenser, coffee maker, automatic water dispenser, card reader, water control integrated machine, industrial water, and other machines that need to measure liquid flow. Package Includes: 1x Water Flow Sensor Specifications: Material:ABS Thread:M16x1.25 Allowing pressure: pressure 1.75Mpa Working voltage: DC324V Max-Current: 15mA Flow Range:1-20L/min note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.