Description : This controller module is used for testing the water level of tower , control large current relay to achieve automatic control water tower tank pumping . The module has small size , simple wiring , lower power consumption , high switching capacity , strong anti - interference , feature high stablity . Automatically open when stably achieve pool ( tower ) water pump the water , the pump automatically stop pumping to full . Note : This contriller module is without cable ( probe ), can use household wiring replace probe . Peel the thrum of about 2cm , the bare wire into the water can be directly induced . Specification : Material : ABS Plastic Color : Blue Size : 60x50x30mm / 2 . 36x1 . 97x1 . 18 inch Package Includes : 1 Piece Liquid Level Controller Switch Module (2 Pack) Note : 1 . Due to the light and screen difference , the item &# 39 ; s color may be slightly different from the pictures . 2 . Please allow 1 - 3mm differences due to manual measurement .