Description <br> 1. Working voltage: DC 5V <br> 2. Working current 7-12MA <br> 3. One power indicator light, four water level indicator lights <br> 4. Four water level output interfaces (low level 0V, high level 3.7V),for MCU IO <br> 5. Four water level sensor interfaces (2P XH2.54) <br> <br> Note:1. Package does not contain probe (wire).2P Male XH2.54mm Pitch Wire Cable can be used as a probe,which can be prepared by yourself. <br> 2. For safety, use an DC power supply with good isolation <br> Application: <br> for Arduiuo NANO IO <br> for FPGA/CPLD ARM STM32 <br> Home water tower automatic water supply system <br> Aquarium Fish tank Water Changer System <br> Fill the water tower automatically <br> Automatic pumping from water tower <br> Conductive liquid automatic control <br> Automatic feeding system for poultry and livestock <br> Farm automatic water supply system <br> And other occasions that require automatic water supply and water exchange. <br> Solenoid valve water pump motor automatic control <br> The printing/appearance from batch to batch, but it not affect the use; the actual product may have color difference due to different light or display. <br> Specification:No Pin <br> Colour:White <br> Material:PCB <br> <br> Package Contents: <br> 1 x DC 5V 4 Outputs Water Liquid Level Indicator Board <br> <br> Only the above package content, other products are not included. <br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. <br>