Features: Made of preminum plastic, durbale & lengthy for time service. Optical sensing with pleasant reliability. for pipelines: Internal Diameter: 4-5MM. Power Supply: 3, analog voltage output Suitable for coffee maker, mop machine, floor washing machine. Specifications: Material: Plastic Power Supply: three Package Includes: 1x Water Level Sensor Note: Please allow 1-3cm error thanks to guide measurement. pls make sure you do not mind earlier than you bid. Due to the difference between assorted monitors, the image won't replicate the particular coloration of the item.