33V-5V Non Contact Water Level Sensor Capacitive Liquid Level Sensor Liquid Detection Switch Controller Water Level Detector Specification: New and high quality Product Name: Capacitive Liquid Level Sensor Product function: water shortage reminder/full water reminder Product model: need to work close to the plastic water tank Unable to detect pure alcohol/gas Use in a dry environment Avoid high temperature use Wire type: sheathed wire Product application: hand sanitizer machine/water dispenser/aroma diffuser, etc. Voltage :3.3V-5 The yellow is sign wire The red is positive wire The black is negative wire Package Included1pc Note: 1. Due to manual measurement, please allow an error of 1-3mm. 2. As different computers display different colors, thank you for your understanding, the actual product color may be slightly different from the image.